My child has a toy kitchen, with two LED „cooking plates“ which drain the 6 AA batteries within a few days, despite them automatically turning off.
I opened it up and googled the serial number of the IC and the first thing that popped up was a 10 year old thread of two guys having the same problem. They reverse engineered the board and build a replacement based on a MSP430.
https://forum.43oh.com/topic/3425-nano-project-fix-an-ikea-toy/
#hacking


