Philips Sonicare

A closer look at the hardware. Opening the toothbrush Thanks to iFixIt we got it open fairly quickly. The bottom cap has the following information The FCC ID is 2ADZNHX68 and tell us that it’s using 13.56 Mhz, so NFC. Based on Cyrill’s information, that’s used for saving the toothbrush run time. The whole disassembly looks like this. SOC The best shot of the SOC I found is here The chip is a Cypress CY8C4146AZI-S433, now acquired by Infineon....

I woke up to a strange buzzing sound coming from my bathroom. It turns out that one of our toothbrushes started it’s own life and turned itself on and then off again after a while. So I did what any self-respecting hacker would do: I threw it out the window and let the battery run out, and went back to sleep. The next morning I take the toothbrush and put it on my lab bench to be disassembled, hoping that it could be salvaged by cleaning it out or replacing an obvious part....