I remade it with a schematic
Added 2022-12-19 03:53:13 +0000 UTCHere's the video as it should have been. I did the full reverse engineering and schematic this time, and the bulk of the circuitry is just to turn the LED on to display charging and discharging.
The first part of the video is the same, as the case was destroyed while opening it. But at about 5 minutes in it goes onto the new video section.
While neatening up the complex schematic I missed an important 10K resistor. See if you can work out where it goes on the first page of the schematic. The answer is at the bottom of the YouTube video description.
https://www.youtube.com/watch?v=UN0IXJbpsXQ
Comments
Thank you Clive. We do really appreciate you. Having a good work / life balance can be difficult. We hope that you are taking care of yourself too. Yes, I’d guess new / old stock too.
Miek Buchanan
2022-12-21 17:36:27 +0000 UTCI do an abstract "rats nest" sketch on the back of paper I've printed listings or datasheet pages on for previous videos.
Big Clive
2022-12-20 05:29:14 +0000 UTCI didn't guess right, but when I read your text it's obvious. A neat illustration in how fiddly reverse engineering a board can be. I assume you have a good supply of paper scraps, pencils and rubber!
Mike Page
2022-12-19 22:07:27 +0000 UTC
