- self-charging backup battery - 2 Updates
| vjp2.at@at.BioStrategist.dot.dot.com: Mar 07 10:00PM It seems what I am really seeking is a simplified UPS?? -- Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
| Jeff Liebermann <jeffl@cruzio.com>: Mar 07 06:23PM -0800 On Fri, 24 Feb 2023 14:08:02 -0000 (UTC), >I have a 1980 device (HP2621a terminal) with a now discontinued battery which >retained settings while off. I am wondering if there isn't ome sort of >continuously recharging (when on) battery that could replace this? You would need to add a charging circuit to make that work. If you just want to get it working: 1. Kindly disclose the discontinued battery voltage and part number. 2. Install a lithium (not Li-Ion) battery as used in some smoke alarms. Select the number of cells in series to be slightly more than the rated voltage of the discontinued battery. Button cells, such as CR2032 will work, but will not last as long as larger cells. 3. Install whatever number of series silicon diodes are necessary to reduce the battery voltage down to what makes the terminal happy. About 0.6V per cell. 4. Find a place to mount the battery pack inside the terminal. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
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