Blinking an led without firmware and micros
Galvanic isolation
I need more power
Digital inputs
Adventures in charging while in host mode
Forget the arduino. Forget purchasing microcontrollers. Forget writing firmware. All you need to control the world is your Android phone (or tablet), a little Java code, and a box of scraps. In this talk I’ll show you how to put together an opto-isolated, software-controlled power switch using just scrap parts you can find in the nearest dumpster: a half-broken USB keyboard, a faulty notebook power supply, an ATX power supply from a discarded PC. No custom kernel required: works with standard AOSP. No rooting required either. No firmware to be written, no need to flash anything. All you need is some Java magic and a decent Android device. Be a superhero, save the environment, learn some low-level stuff and brush up on a little electronics. It’s all quite simple, and actually fun.
Intermediate
