Polar V800 Salvage - lime with video

lime with video — Fri, 30 Aug 2019 11:27:13 GMT

Glad that worked! Your technique made me a bit nervous because I don't think it's as safe as you're assuming. Depending on the type of protection the circuit has, 500mA may be way too much reverse current. And typically USB data pins are 3.3v tolerant only. It's safer to positively identify ground first, using continuity to the metalwork or ground plane. If you need to test all combinations, I'd use the smallest current limit you can.