Vermes
Advanced Member level 4
It is a design of new electronics for a fleshlight with accumulator and charger. Old electronics needed to be changed, because it looked like that:
MCP-73831 was used in this project. You have to remember that the PCB should be designed so that it fits the housing. It can be made in Eagle in surface assembly. Schematic was taken from data sheet of mentioned above chip. The whole is powered from an USB port.
The charger charges accumulators up to 4,2V, and the accumulator does not heat up too much.
Pictures of the PCB in housing:
Operating charger:
Link to original thread (useful attachment) - Ładowarka Li-ion na bazie MCP-73831