The BINCO a binary counter that can be configured to count up or down. It uses Snaptron domes as buttons (on, slow/fast a,d rest). The heart of the counter is a 555 timer driving a 74HC4020D 14-bit Binary Counter from which 11 taps drive some nice reverse-mount LEDs.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
