Here’s a fun project making a geeky wristwatch, using the QDSP-6064 bubble LED display. The clock components are plugged in to a “breadboard”. These type of boards are usually used for prototyping electronic circuits. Now you can have an electronics prototyping platform on your wrist at all times! There is an rechargeable PSU underneath the bread board, delivering 3.1V. The PSU is charged via an USB-micro connector on the side.

The MCU chosen for this project is an 14 pin ATtiny84A. The MCU is run of a 32768Hz crystal, used both for CPU clock and RTC timer (using