Original thread with background on this problem:
http://www.picaxeforum.co.uk/showthread.php?26183-Picaxe-battery-charger-issues
I've tried the suggestions and had a couple of the circuit boards work, and some not work. I've tried diodes on the output, both in series with the battery being charged, and across the output reverse-biased (like for a relay coil). I've even tried separate power supplies for the charging power and for the Picaxe power and still have issues. I'm seriously thinking of abandoning this project because I seem to have gotten in over my head.
http://www.picaxeforum.co.uk/showthread.php?26183-Picaxe-battery-charger-issues
I've tried the suggestions and had a couple of the circuit boards work, and some not work. I've tried diodes on the output, both in series with the battery being charged, and across the output reverse-biased (like for a relay coil). I've even tried separate power supplies for the charging power and for the Picaxe power and still have issues. I'm seriously thinking of abandoning this project because I seem to have gotten in over my head.