Season 3 of our show begins with a 2 part episode in which we build an Anti-Teen-Texting Device that parents can install in their kid’s car. Of course in my day this problem would have been solved by 1) cell phones barely existing 2) my parents would never have bought me one if they had 3) they also didn’t buy me a car …but I digress.
More photos and info can be found below.
The device consists of an MCU (the ever-useful ATMEGA328) a hand-wired MicroSD card for datalogging, and a really loud siren.
The device works by detecting the amount of current being drawn by the MicroUSB charge jack. Current being drawn = phone in dock = no alarm.
If the car is started without the phone in the jack your teen has about 10 seconds to stick it in, else there’s an alarm and the infraction is logged to the SD card.