• Power Bank Keepalive

    From Don@21:1/5 to All on Sat Jun 11 21:04:41 2022
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From a a@21:1/5 to Don on Sat Jun 11 14:28:09 2022
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to a a on Sat Jun 11 21:43:19 2022
    a a <manta103g@gmail.com> wrote:
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    smart powerbanks come 2 usb sockets, so you just connect your MP3 player
    to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank

    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From a a@21:1/5 to Don on Sat Jun 11 15:21:51 2022
    On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
    a a <mant...@gmail.com> wrote:
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.
    MP3 player is an ancienct product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to Don on Sat Jun 11 16:42:42 2022
    On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), "Don" <g@crcomp.net> wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,

    Maybe just a capacitor would keep it alive.



    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From boB@21:1/5 to Don on Sat Jun 11 17:12:14 2022
    On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), "Don" <g@crcomp.net> wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,


    forgot the 'u' in microamps.

    I thought, what USB can supply 6 AMPS ?!?! :)

    boB

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to a a on Sun Jun 12 01:16:50 2022
    a a wrote:
    Don wrote:
    a a wrote:
    Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player >> > to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.

    MP3 player is an ancient product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.

    It sounds about right - you're probably correct in regards to what most
    people do. They use their phone to download MP3s from the Inet.
    OTOH, my phone is used strictly for phone calls, SMS, and
    photographs. By choice, it never connects to the Inet.
    A plain MP3 player appeals to me in the same manner as a unix
    command - it does only one job and it does it well. In this case, it
    plays MP3s pre-loaded onto an SD card. And it actually is still sold on
    ebay. There's a link to a retailer on my page.

    Upon further reflection, your LED idea certainly works as a replacement
    for the 555 circuit. It's a tradeoff - LED simplicity versus 555
    efficiency. As is, the 555's about 18 times more efficient. It's
    probably doable to make it 40 - 50 times more efficient.

    The simultaneous use of both USB outputs didn't work for me. Nor did the simultaneous use of an external and internal battery. The back of the
    Power Bank states "Output: 5 V DC, 1 A or 2.1 A." There's two lightening
    bolts next to one of the USB outputs, while the other has only a single
    bolt. Presumably the former's for 2A. Anyhow, it seems to imply you can
    either use one or the other, ???but not both???

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to boB on Sun Jun 12 01:25:19 2022
    boB wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    forgot the 'u' in microamps.

    I thought, what USB can supply 6 AMPS ?!?! :)

    The back label on my Power Banks boasts it can supply 5 V DC at 2.1 A
    for 5,000 mAh.

    Anyhow, my message is UTF-8 encoded. The question mark between the 6.8
    and A is actually a Greek mu character.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to jlarkin@highlandsniptechnology.com on Sun Jun 12 01:41:47 2022
    jlarkin@highlandsniptechnology.com wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Maybe just a capacitor would keep it alive.

    The Power Bank doesn't show a garbage can with an X through it as is
    typically found on Li-Ion batteries. For all I know the Power Bank /is/
    just a capacitor.
    It's the perfect size - about half the length of a smart phone. The
    whole gadget fits nicely into my pocket with plenty of space left over
    for a small flashlight and a Swiss army knife.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From rbowman@21:1/5 to a a on Sat Jun 11 20:31:06 2022
    On 06/11/2022 04:21 PM, a a wrote:
    On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
    a a <mant...@gmail.com> wrote:
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player >>> to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; >> She set out one day In a relative way And returned on the previous night.
    MP3 player is an ancienct product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.


    I was surprised a couple of years ago when I went to Best Buy to get an
    MP3 player and they only had one, one piece that is, not one model.

    The question remains which would I rather take to the gym and possibly
    destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to
    clip to my t-shirt? Even though I don't have a $1000 smart phone it's
    still not a hard question.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to Don on Sun Jun 12 10:27:48 2022
    On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), "Don" <g@crcomp.net> wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,

    When the MP3 player is drawing uA, it means that its own
    internal battery is charged up. Who cares if the external
    bank shuts down ?

    If the MP3 player internal battery is low, it should draw
    current from the external bank, to recharge, when present.

    If your external battery bank is misbehaving, you should
    consider using another that doesn't.

    If the mp3 Player is misbehaving, then ditto.

    'Smart' battery electronics are configured, modified
    and patched by imbeciles.

    Portable MP3 players are available that offer trouble-free
    operation from a single charge, at moderate volume levels,
    for >12hrs. No fuss - no muss - no bother.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Don on Sun Jun 12 14:47:29 2022
    Don wrote:
    jlarkin@highlandsniptechnology.com wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Maybe just a capacitor would keep it alive.

    The Power Bank doesn't show a garbage can with an X through it as is typically found on Li-Ion batteries. For all I know the Power Bank /is/
    just a capacitor.
    It's the perfect size - about half the length of a smart phone. The
    whole gadget fits nicely into my pocket with plenty of space left over
    for a small flashlight and a Swiss army knife.

    In the light of a new day, my caffeine enhanced neurons now understand
    your intention to use a capacitor to replace the 555 and not the Power
    Bank. It probably won't work because MP3 chips seem super sensitive to
    the slightest power disruption, no matter how short.
    IOW the Power Bank must first automatically shutdown before the
    capacitor kicks in. And, most likely, the oh-so-brief, transient voltage
    droop triggers the MP3 player to replay its current audio track from the beginning.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to legg on Sun Jun 12 15:23:38 2022
    legg wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    When the MP3 player is drawing uA, it means that its own
    internal battery is charged up. Who cares if the external
    bank shuts down ?

    If the MP3 player internal battery is low, it should draw
    current from the external bank, to recharge, when present.

    If your external battery bank is misbehaving, you should
    consider using another that doesn't.

    If the mp3 Player is misbehaving, then ditto.

    'Smart' battery electronics are configured, modified
    and patched by imbeciles.

    Portable MP3 players are available that offer trouble-free
    operation from a single charge, at moderate volume levels,
    for >12hrs. No fuss - no muss - no bother.

    My MP3 contraption was originally connected to a half-depleted Power
    Bank (too lazy to fully charge it beforehand) with half of its power consumption LED indicators dark. And it's now been used for about fifty
    hours with no change in indicators. In the end, instead of hours, the
    Power Bank may last for /seasons/.

    My 555 keep-alive is the tail end of a long process. It entailed experimentation on a couple of different MP3 players and Power Banks.
    It all cases, the simultaneous use of internal and external batteries
    and/or USB Power Bank ports ended in failure.

    My goal never was to advance the state of the art. It was always to
    simply listen to MP3s during treks and spins, from a SD inserted into
    a cheap, disposable (eg no tears if lost/broken) MP3 player.

    From a metaphysical perspective, my keep-live functions as absurdist,
    modern art. An attempt to add an old fashioned ON/OFF switch to a
    device created by an industry with an unhealthy obsession for baroque,
    Rube Goldbergist switches.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ricky@21:1/5 to jla...@highlandsniptechnology.com on Sun Jun 12 08:45:47 2022
    On Sunday, June 12, 2022 at 11:41:11 AM UTC-4, jla...@highlandsniptechnology.com wrote:
    On Sun, 12 Jun 2022 14:47:29 -0000 (UTC), "Don" <g...@crcomp.net> wrote:

    Don wrote:
    jla...@highlandsniptechnology.com wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Maybe just a capacitor would keep it alive.

    The Power Bank doesn't show a garbage can with an X through it as is
    typically found on Li-Ion batteries. For all I know the Power Bank /is/
    just a capacitor.
    It's the perfect size - about half the length of a smart phone. The
    whole gadget fits nicely into my pocket with plenty of space left over
    for a small flashlight and a Swiss army knife.

    In the light of a new day, my caffeine enhanced neurons now understand
    your intention to use a capacitor to replace the 555 and not the Power >Bank. It probably won't work because MP3 chips seem super sensitive to
    the slightest power disruption, no matter how short.
    IOW the Power Bank must first automatically shutdown before the
    capacitor kicks in. And, most likely, the oh-so-brief, transient voltage >droop triggers the MP3 player to replay its current audio track from the >beginning.

    Danke,
    Maybe a cap across the UPS ac output will make current that fools the
    load sensor into thinking there is always a load. The cap will
    dissipate no power.

    It wouldn't be hard to try.

    Not a UPS, a power bank. No AC output.

    --

    Rick C.

    - Get 1,000 miles of free Supercharging
    - Tesla referral code - https://ts.la/richard11209

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to All on Sun Jun 12 12:02:08 2022
    On Sat, 11 Jun 2022 20:31:06 -0600, rbowman <bowman@montana.com>
    wrote:

    On 06/11/2022 04:21 PM, a a wrote:
    On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
    a a <mant...@gmail.com> wrote:
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player >>>> to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; >>> She set out one day In a relative way And returned on the previous night. >> MP3 player is an ancienct product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.


    I was surprised a couple of years ago when I went to Best Buy to get an
    MP3 player and they only had one, one piece that is, not one model.

    The question remains which would I rather take to the gym and possibly >destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to
    clip to my t-shirt? Even though I don't have a $1000 smart phone it's
    still not a hard question.

    It is a little disappointing; how the original, simple MP3 players
    disappeared from the local retail market.

    I think it was the introduction of early small screens that killed
    them. Fashion trends are a bitch.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to Don on Sun Jun 12 08:40:59 2022
    On Sun, 12 Jun 2022 14:47:29 -0000 (UTC), "Don" <g@crcomp.net> wrote:

    Don wrote:
    jlarkin@highlandsniptechnology.com wrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Maybe just a capacitor would keep it alive.

    The Power Bank doesn't show a garbage can with an X through it as is
    typically found on Li-Ion batteries. For all I know the Power Bank /is/
    just a capacitor.
    It's the perfect size - about half the length of a smart phone. The
    whole gadget fits nicely into my pocket with plenty of space left over
    for a small flashlight and a Swiss army knife.

    In the light of a new day, my caffeine enhanced neurons now understand
    your intention to use a capacitor to replace the 555 and not the Power
    Bank. It probably won't work because MP3 chips seem super sensitive to
    the slightest power disruption, no matter how short.
    IOW the Power Bank must first automatically shutdown before the
    capacitor kicks in. And, most likely, the oh-so-brief, transient voltage >droop triggers the MP3 player to replay its current audio track from the >beginning.

    Danke,

    Maybe a cap across the UPS ac output will make current that fools the
    load sensor into thinking there is always a load. The cap will
    dissipate no power.

    It wouldn't be hard to try.



    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From a a@21:1/5 to legg on Sun Jun 12 09:14:24 2022
    On Sunday, 12 June 2022 at 18:01:21 UTC+2, legg wrote:
    On Sat, 11 Jun 2022 20:31:06 -0600, rbowman <bow...@montana.com>
    wrote:
    On 06/11/2022 04:21 PM, a a wrote:
    On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
    a a <mant...@gmail.com> wrote:
    On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player >>>> to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me. >>> It was eventually, reluctantly, rejected because it doesn't work out so >>> well in practice. Read the link to find out why.
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night. >> MP3 player is an ancienct product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.


    I was surprised a couple of years ago when I went to Best Buy to get an
    MP3 player and they only had one, one piece that is, not one model.

    The question remains which would I rather take to the gym and possibly >destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to >clip to my t-shirt? Even though I don't have a $1000 smart phone it's
    still not a hard question.
    It is a little disappointing; how the original, simple MP3 players disappeared from the local retail market.

    I think it was the introduction of early small screens that killed
    them. Fashion trends are a bitch.

    RL
    MP3 player is off-line device, so no more hot since you need to get one connected to smaretphone or PC to get music files copied.

    MP3 is dead horse today , worth nothing

    You risk nothing if you wear bluetooth earphones at the gym.

    Destroy available MP3 devices and forget the problem

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Doe@21:1/5 to a a on Sun Jun 12 16:27:42 2022
    a a <manta103g@gmail.com> wrote:

    legg wrote:
    rbowman wrote:
    a a wrote:
    Don wrote:
    a awrote:
    Don wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses a 555 to
    nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    smart powerbanks come 2 usb sockets, so you just connect your MP3
    player to one usb socket and LED light to 2nd usb socket to keep
    it on.

    Smart MP3 platers come with internal battery, you can charge from
    power bank

    Your blatantly obvious approach was the first solution attempted by
    me. It was eventually, reluctantly, rejected because it doesn't
    work out so well in practice. Read the link to find out why.
    Danke,

    -- Don, KB7RPU, https://www.qsl.net/kb7rpu There was a young lady
    named Bright Whose speed was far faster than light; She set out one
    day In a relative way And returned on the previous night.

    MP3 player is an ancienct product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.

    I was surprised a couple of years ago when I went to Best Buy to get
    an MP3 player and they only had one, one piece that is, not one model.

    The question remains which would I rather take to the gym and possibly
    destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient
    to clip to my t-shirt? Even though I don't have a $1000 smart phone
    it's still not a hard question.

    It is a little disappointing; how the original, simple MP3 players
    disappeared from the local retail market.

    I think it was the introduction of early small screens that killed
    them. Fashion trends are a bitch.

    MP3 player is off-line device, so no more hot since you need to get one connected to smaretphone or PC to get music files copied.

    MP3 is dead horse today , worth nothing

    You risk nothing if you wear bluetooth earphones at the gym.

    Destroy available MP3 devices and forget the problem

    Run that through Google Translate again, this time choose English as the
    target language.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Cydrome Leader@21:1/5 to Don on Sun Jun 12 18:41:39 2022
    Don <g@crcomp.net> wrote:
    a a wrote:
    Don wrote:
    a a wrote:
    Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ??A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )
    smart powerbanks come 2 usb sockets, so you just connect your MP3 player >>> > to one usb socket and LED light to 2nd usb socket to keep it on.

    Smart MP3 platers come with internal battery, you can charge from power bank
    Your blatantly obvious approach was the first solution attempted by me.
    It was eventually, reluctantly, rejected because it doesn't work out so
    well in practice. Read the link to find out why.

    MP3 player is an ancient product, no more offered on a market.
    Most guys prefer smartphone to get and play back music.

    It sounds about right - you're probably correct in regards to what most people do. They use their phone to download MP3s from the Inet.
    OTOH, my phone is used strictly for phone calls, SMS, and
    photographs. By choice, it never connects to the Inet.
    A plain MP3 player appeals to me in the same manner as a unix
    command - it does only one job and it does it well. In this case, it
    plays MP3s pre-loaded onto an SD card. And it actually is still sold on
    ebay. There's a link to a retailer on my page.

    Check out this dusty fool foaming over some trash mp3 player that requires
    an external battery pack plus some 555 hack nonsense to even stay powered
    on.

    Rediculous.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to manta103g@gmail.com on Mon Jun 13 05:00:10 2022
    On a sunny day (Sun, 12 Jun 2022 09:14:24 -0700 (PDT)) it happened a a <manta103g@gmail.com> wrote in <5f238ad3-dc3e-4fe5-830c-898dfed23cfen@googlegroups.com>:

    MP3 player is off-line device, so no more hot since you need to get one connected to smaretphone or PC to get music files
    copied.

    MP3 is dead horse today , worth nothing

    Bull, I have many mp3 capable things, credit card size mp3 / video player, what not, phone
    But my mp3 player is a 20 year old or so Creative Muvo, runs on an AAA Eneloop battery all day if needed,
    easy to charge or swap, I concatenated all my favorite music into one long mp3 so it
    can run unattended for many hours, and is small and simple to use.



    You risk nothing if you wear bluetooth earphones at the gym.

    I prefer no RF shit next to my head, you see what it can do to people ;-)


    Destroy available MP3 devices and forget the problem

    Silly

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jasen Betts@21:1/5 to boB on Sat Jun 18 01:33:04 2022
    On 2022-06-12, boB <boB@K7IQ.com> wrote:
    On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), "Don" <g@crcomp.net> wrote:

    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 ?A drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,


    forgot the 'u' in microamps.

    He used a mu symbol, just your newsreader apparently can't
    handle the way he did that.

    --
    Jasen.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rich S@21:1/5 to Don on Sat Jun 18 15:40:58 2022
    On Saturday, June 11, 2022 at 9:04:48 PM UTC, Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.

    Hello Don, you're obviously a handy guy, so
    why not just open up the power bank, and
    bypass that 'auto-shut-off' circuitry?

    Maybe you use this power back for other uses?
    So you still want the auto-shut off?

    I don't see the logic why that feature is needed
    in the power bank, anyway. Any electronic device (beyond
    a simple thing like a light) is likely to have its own auto-shut
    -off function.

    But you do want to preserve it, then I'd install a simple
    SPST switch to select bypassed- or native-behavior
    as you like.

    cheers, Rich S.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Rich S on Sun Jun 19 18:26:03 2022
    Rich S wrote:
    Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Hello Don, you're obviously a handy guy, so
    why not just open up the power bank, and
    bypass that 'auto-shut-off' circuitry?

    Maybe you use this power back for other uses?
    So you still want the auto-shut off?

    I don't see the logic why that feature is needed
    in the power bank, anyway. Any electronic device (beyond
    a simple thing like a light) is likely to have its own auto-shut
    -off function.

    But you do want to preserve it, then I'd install a simple
    SPST switch to select bypassed- or native-behavior
    as you like.

    One reason for me to leave the Power Bank unopened is it may open a can
    of worms. Especially if it uses an undocumented, expoxied, exposed-lead
    chip to control its charge cycle /and/ perform an automatic shutdown.
    Also, my tear-down of the MP3 player to remove its battery and USB-B
    port already sated my appetite to take things apart (for now). :)
    You didn't comment on my MP3 player. Muchas Gracias. After all, the player's merely an available adjunct to test my keepalive with a field
    trial.

    Although the keepalive functioned as originally intended, the prospect
    to double its efficiency tempted me to replace R2's original 150 K ohm
    value with a 300 K ohm. So my page now reflects R2's new value: <https://crcomp.net/mp3mod/index.php>
    The keepalive successfully functions on two distinct Power Banks
    with different capacities, marketed under separate brands. Besides auto- shutdown, both Power Banks also share similar design language [1], as if
    they both originate from the same factory in China.

    Note.

    [1] https://encyclopedia.thefreedictionary.com/design+language

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From a a@21:1/5 to Don on Sun Jun 19 11:58:34 2022
    On Sunday, 19 June 2022 at 20:26:10 UTC+2, Don wrote:
    Rich S wrote:
    Don wrote:
    Many consumer grade USB power banks come with a built-in
    automatic shutdown circuit. Light loads, such as the nominal
    6.8 μA drawn by a portable MP3 player, are not enough to
    prevent shutdown. To compensate, this project uses
    a 555 to nominally pull 100 mA every 5.5 seconds.

    ( excerpt - read more at https://crcomp.net/mp3mod/index.php )

    Hello Don, you're obviously a handy guy, so
    why not just open up the power bank, and
    bypass that 'auto-shut-off' circuitry?

    Maybe you use this power back for other uses?
    So you still want the auto-shut off?

    I don't see the logic why that feature is needed
    in the power bank, anyway. Any electronic device (beyond
    a simple thing like a light) is likely to have its own auto-shut
    -off function.

    But you do want to preserve it, then I'd install a simple
    SPST switch to select bypassed- or native-behavior
    as you like.
    One reason for me to leave the Power Bank unopened is it may open a can
    of worms. Especially if it uses an undocumented, expoxied, exposed-lead
    chip to control its charge cycle /and/ perform an automatic shutdown.
    Also, my tear-down of the MP3 player to remove its battery and USB-B
    port already sated my appetite to take things apart (for now). :)
    You didn't comment on my MP3 player. Muchas Gracias. After all, the
    player's merely an available adjunct to test my keepalive with a field trial.

    Although the keepalive functioned as originally intended, the prospect
    to double its efficiency tempted me to replace R2's original 150 K ohm
    value with a 300 K ohm. So my page now reflects R2's new value: <https://crcomp.net/mp3mod/index.php>
    The keepalive successfully functions on two distinct Power Banks
    with different capacities, marketed under separate brands. Besides auto- shutdown, both Power Banks also share similar design language [1], as if they both originate from the same factory in China.

    Note.

    [1] https://encyclopedia.thefreedictionary.com/design+language
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.
    https://crcomp.net/arpanet/index.php
    fake
    https://crcomp.net/beebivouac/index.php
    fake
    https://crcomp.net/pseudocell/index.php
    fake
    replace AA cell by Li-Ion battery + step down controller + solar cell https://crcomp.net/mp3mod/index.php
    fake

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Doe@21:1/5 to All on Sun Jun 19 19:02:02 2022
    a a <manta103g@gmail.com> wrote:

    Are you from Poland?

    I would make sense. Poland sucks.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Doe@21:1/5 to All on Sun Jun 19 19:04:51 2022
    *it

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From a a@21:1/5 to John Doe on Sun Jun 19 13:09:30 2022
    On Sunday, 19 June 2022 at 21:02:08 UTC+2, John Doe wrote:
    ..
    John Doe’s profile photo
    John Doe
    03:32 (19 hours ago)
    to
    Eddie, the Astraweb nym-shifting stalker is flagging off-topic posts
    with its forgery of my ID, then replies to its own forgery. Strange but true.

    Eddie has never posted anything NORMAL except when it got a spanking...

    https://groups.google.com/g/sci.electronics.repair/c/MesPLcGU4BE

    See also...
    John Doe <always.look message.header> (Astraweb, Aioe.org)
    Peter Weiner <dtgamer99 gmail.com>
    Edward H. <dtgamer99 gmail.com>
    Edward Hernandez <dtgamer99 gmail.com>

    --
    John Doe <alway...@message.header> wrote:

    Path: eternal-september.org!reader02.eternal-september.org!aioe.org!news.uzoreto.com!news-out.netnews.com!news.alt.net!fdc2.netnews.com!peer02.ams1!peer.ams1.xlned.com!news.xlned.com!peer03.ams4!peer.am4.highwinds-media.com!news.highwinds-media.com!
    fx03.ams4.POSTED!not-for-mail
    From: John Doe <alway...@message.header>
    Newsgroups: sci.electronics.design,free.spam
    Subject: You have won an John Deere Mower
    Followup-To: alt.test.group
    References: <13751d9d-2179-4542...@googlegroups.com>
    Injection-Date: Sat, 18 Jun 2022 19:02:40 -0000 (UTC)
    Injection-Info: reader02.eternal-september.org; posting-host="aefae07b417003b570527823e77a9930"; logging-data="29200"; mail-complaints-to="ab...@eternal-september.org"; posting-account="U2FsdGVkX18QBXYPJWay5G0R7zD10mjY5gUD5xOvt6I="
    User-Agent: Xnews/2006.08.05
    Lines: 28
    Message-ID: <kQsrK.200683$BZ99...@usenetxs.com>
    X-Complaints-To: https://www.astraweb.com/aup
    NNTP-Posting-Date: Sat, 18