[J8g8j] has been playing around with an old cellphone. He wanted to control it using a microcontroller but since there's 24 buttons he wasn't thrilled about hooking up a couple dozen relays to do the switching. Instead, he managed to control all 24-buttons using just 6-pins of a microcontroller. The proof-of-concept video that he posted on his site shows the phone responding to an arbitrary … [Read more...]