On Wed, 17 Jan 2024 12:16:29 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:
On Tuesday, January 16, 2024 at 11:02:40?AM UTC-8, john larkin wrote:
This is a first pass at the dev board.
https://www.dropbox.com/scl/fi/709v4pqjhe91jnwqh4wvg/Z566_Sch_2.jpg?rlkey=fjq3a9re53cv5l0zn9ya00akk&raw=1
It would be used in development and production test. Every
RP2040-based board would have the small-pitch 20 pin ribbon cable
header.
Why bother with pins, and ribbon connector insertion force? Just print >>test point pads, a few alignment holes, and make a plug of
spring pins. It's not like you need this access while the unit is
bolted into its box and racked into a larger system.
Do it with two different diameter alignment pins, so it doesn't get >>reversed. A captive nut to retain it would be useful, too.
Too much work! We can buy the ribbon cables and connectors from
stock.
On 2024-01-18, john larkin <jl@650pot.com> wrote:
On Wed, 17 Jan 2024 12:16:29 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:
On Tuesday, January 16, 2024 at 11:02:40?AM UTC-8, john larkin wrote:
This is a first pass at the dev board.
https://www.dropbox.com/scl/fi/709v4pqjhe91jnwqh4wvg/Z566_Sch_2.jpg?rlkey=fjq3a9re53cv5l0zn9ya00akk&raw=1
It would be used in development and production test. Every
RP2040-based board would have the small-pitch 20 pin ribbon cable
header.
Why bother with pins, and ribbon connector insertion force? Just print >>>test point pads, a few alignment holes, and make a plug of
spring pins. It's not like you need this access while the unit is >>>bolted into its box and racked into a larger system.
Do it with two different diameter alignment pins, so it doesn't get >>>reversed. A captive nut to retain it would be useful, too.
Too much work! We can buy the ribbon cables and connectors from
stock.
True, you'd have to order from digikey and wait a day to get such a
connector (tag connect)
we use the Tag Connect TC2030IDC connector intended for PIC programming to >program our ESP32 boards one end plugs right into the ESP-prog, no >modification is needed.
The price seems to have dropped recently, perhaps a patent has
expired, also I'm seeing Chinese clones now.
On 2024-01-18, john larkin <jl@650pot.com> wrote:
On Wed, 17 Jan 2024 12:16:29 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:
On Tuesday, January 16, 2024 at 11:02:40?AM UTC-8, john larkin wrote:
This is a first pass at the dev board.
https://www.dropbox.com/scl/fi/709v4pqjhe91jnwqh4wvg/Z566_Sch_2.jpg?rlkey=fjq3a9re53cv5l0zn9ya00akk&raw=1
It would be used in development and production test. Every
RP2040-based board would have the small-pitch 20 pin ribbon cable
header.
Why bother with pins, and ribbon connector insertion force? Just print >>>test point pads, a few alignment holes, and make a plug of
spring pins. It's not like you need this access while the unit is >>>bolted into its box and racked into a larger system.
Do it with two different diameter alignment pins, so it doesn't get >>>reversed. A captive nut to retain it would be useful, too.
Too much work! We can buy the ribbon cables and connectors from
stock.
True, you'd have to order from digikey and wait a day to get such a
connector (tag connect)
we use the Tag Connect TC2030IDC connector intended for PIC programming to >program our ESP32 boards one end plugs right into the ESP-prog, no >modification is needed.
The price seems to have dropped recently, perhaps a patent has
expired, also I'm seeing Chinese clones now.
On Sat, 9 Mar 2024 01:26:48 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:
On 2024-01-18, john larkin <jl@650pot.com> wrote:
On Wed, 17 Jan 2024 12:16:29 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:
On Tuesday, January 16, 2024 at 11:02:40?AM UTC-8, john larkin wrote:
This is a first pass at the dev board.
https://www.dropbox.com/scl/fi/709v4pqjhe91jnwqh4wvg/Z566_Sch_2.jpg?rlkey=fjq3a9re53cv5l0zn9ya00akk&raw=1
It would be used in development and production test. Every
RP2040-based board would have the small-pitch 20 pin ribbon cable
header.
Why bother with pins, and ribbon connector insertion force? Just print >>>>test point pads, a few alignment holes, and make a plug of
spring pins. It's not like you need this access while the unit is >>>>bolted into its box and racked into a larger system.
Do it with two different diameter alignment pins, so it doesn't get >>>>reversed. A captive nut to retain it would be useful, too.
Too much work! We can buy the ribbon cables and connectors from
stock.
True, you'd have to order from digikey and wait a day to get such a >>connector (tag connect)
we use the Tag Connect TC2030IDC connector intended for PIC programming to >>program our ESP32 boards one end plugs right into the ESP-prog, no >>modification is needed.
The price seems to have dropped recently, perhaps a patent has
expired, also I'm seeing Chinese clones now.
Why do many of the target PCBs have four additional giant holes?
On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:
On Sat, 9 Mar 2024 01:26:48 -0000 (UTC), Jasen Betts >><usenet@revmaps.no-ip.org> wrote:
On 2024-01-18, john larkin <jl@650pot.com> wrote:
On Wed, 17 Jan 2024 12:16:29 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:
On Tuesday, January 16, 2024 at 11:02:40?AM UTC-8, john larkin wrote: >>>>>
This is a first pass at the dev board.
https://www.dropbox.com/scl/fi/709v4pqjhe91jnwqh4wvg/Z566_Sch_2.jpg?rlkey=fjq3a9re53cv5l0zn9ya00akk&raw=1
It would be used in development and production test. Every
RP2040-based board would have the small-pitch 20 pin ribbon cable
header.
Why bother with pins, and ribbon connector insertion force? Just print >>>>>test point pads, a few alignment holes, and make a plug of
spring pins. It's not like you need this access while the unit is >>>>>bolted into its box and racked into a larger system.
Do it with two different diameter alignment pins, so it doesn't get >>>>>reversed. A captive nut to retain it would be useful, too.
Too much work! We can buy the ribbon cables and connectors from
stock.
True, you'd have to order from digikey and wait a day to get such a >>>connector (tag connect)
we use the Tag Connect TC2030IDC connector intended for PIC programming to >>>program our ESP32 boards one end plugs right into the ESP-prog, no >>>modification is needed.
The price seems to have dropped recently, perhaps a patent has
expired, also I'm seeing Chinese clones now.
Why do many of the target PCBs have four additional giant holes?
For the retaining hooks, AKA "legs", these are optional.
On Sat, 9 Mar 2024 19:51:58 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:
On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:
On Sat, 9 Mar 2024 01:26:48 -0000 (UTC), Jasen Betts >>><usenet@revmaps.no-ip.org> wrote:
Why do many of the target PCBs have four additional giant holes?
For the retaining hooks, AKA "legs", these are optional.
I think they are some sorts of stabilizers; must make the connections
more reliable.
They really blow up the board area. I like my 20-pin
ribbon connector better.
I can sneak the ribbon cable out of a closed box, for temperature
testing or whatever. And bring out more signals. That pogo thing
sticks up.
On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:
On Sat, 9 Mar 2024 19:51:58 -0000 (UTC), Jasen Betts >><usenet@revmaps.no-ip.org> wrote:
On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:
On Sat, 9 Mar 2024 01:26:48 -0000 (UTC), Jasen Betts >>>><usenet@revmaps.no-ip.org> wrote:
Why do many of the target PCBs have four additional giant holes?
For the retaining hooks, AKA "legs", these are optional.
I think they are some sorts of stabilizers; must make the connections
more reliable.
They are plastic hooks they make the connection more reliable by
maintaining it hands-free. Without them you must hold the connector
to the board fighting the spring force of the pogo-pins.
They really blow up the board area. I like my 20-pin
ribbon connector better.
Yes.
I can sneak the ribbon cable out of a closed box, for temperature
testing or whatever. And bring out more signals. That pogo thing
sticks up.
It seems unsuited for your application.
Sysop: | Keyop |
---|---|
Location: | Huddersfield, West Yorkshire, UK |
Users: | 415 |
Nodes: | 16 (2 / 14) |
Uptime: | 41:59:33 |
Calls: | 8,722 |
Calls today: | 5 |
Files: | 13,276 |
Messages: | 5,957,027 |