A wave of nostalgia motivated me to try building an accurate frequency counter using an inexpensive microcontroller. I think I got there... what do you think?
Last year I made a GPS enabled Christmas decoration and I just got round to writing about it. There was a good reason.... I promise.
Putting together a combination of hardware and software to create an electronic lock. It has it all: kubernetes, python, MQTT, redis & 3d printing!
Controlling 196 LEDs using 3 pins on an arduino including PWM to create hundreds of colours (well 729).
