DaTajm is a wristwatch based on a PIC16F1824 powered by a single CR1216 lithium coin cell. I’m using a sandwich of three PCBs. The topmost pcb (0.8mm thick) have 12 leds and a resistive touchpad on the top side and all the other parts on the bottom. The middle pcb (1.6mm( is just a spacer for the battery. The bottom pcb have a contact for the positive pole of the battery and a soldered cable up to the top pcb.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.