04-21-2021, 03:11 AM
(This post was last modified: 04-21-2021, 03:14 AM by dsimic.
Edit Reason: Clarified a bit
)
(04-21-2021, 02:28 AM)Pine Wrote: As for the battery holder, just for future readers who want it off without desoldering it, here is what I did with an Exacto knife tip:
Then people can take their time with the battery posts. I just use a Dremel now to trim the posts away for my diode fix. Yes, this is a one-way procedure - not getting the battery holder back.
Got it now, there's no intention of putting the battery holder back on. In that case, I agree that a slightly destructive approach is better when it comes to preserving the solder pads for the two battery holder pins.
(04-21-2021, 02:28 AM)Pine Wrote: I had a thought experiment where the second diode could be soldered to the untouched battery holder +RTC post (maybe at the base) in my third photo, and the other leg could be soldered to a thin square of metal, and an insulator between the original +RTC post and the new thin metal square. Then the battery + side makes contact not with the original post, but with this new interstitial metal square and the diode does its thing. The second diode leg could come up and over from the outside of the holder and enter down from the top. Then the battery holder can still be used. Thought experiment. This is what I was visualizing FWIW.
Nice, the goal would be to create a modified battery holder that contains an "invisible", "built-in" barrrier diode.
A less complicated (and possibly cleaner-looking) approach could be to uncrimp only the "+" battery terminal, leaving the "-" terminal untouched. Then, unsolder the "+" pin, which should be easier to do separately. Then, use a through-hole Schottky diode as the new "+" pin: simply put the cathode leg through the pin hole and solder it to the pad, and twist the other end into a loop, just like the original "+" pin. After that, the original "+" battery terminal could be crimped back, finishing the modification.
There should be more than enough space inside the battery holder for the body of a small Schottky diode. However, crimping the original terminal back might prove troublesome, as I already noted in my earlier post, but it would need to be tried out.