I have an hp2621a terminal which had a battery to keep nonvolatile settings (eg baud rate, parity &c). I want a chargeable battery to keep those settings going but to charge when I have the machine on.
I have an hp2621a terminal which had a battery to keep nonvolatile settings
(eg baud rate, parity &c). I want a chargeable battery to keep those settings
going but to charge when I have the machine on.
In <07c6dfdb-88a5-4441...@googlegroups.com> by Peter W. <peterw...@gmail.com> on Fri, 17 Mar 2023 10:23:27 we perused:
I have an hp2621a terminal which had a battery to keep nonvolatile settings
(eg baud rate, parity &c). I want a chargeable battery to keep those settings
going but to charge when I have the machine on.
*+-The issue that comes to mind is whether a/the power-supply would cause problems if connected to the terminal with or without the battery. If not, would an appropriate Zener diode do the trick?
Thanks..
THough I also realise I could get two batteries, use one, charge the other..
But I suspect it will not fit exactly so I need to solder it
--
Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
How do you use diodes and capapcitors to switch a 4v power supply
so it continuously charges a battery when not being used.
keep nonvolatile settings
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