A binary counter
BINCO is an 11-bit binary counter that can be configured to count up or down. It uses tactile domes as buttons, one of which can control the counter to count slow or fast. Another resets the counter. It is powered by a 3V CR2032 and the circuit is designed for it to last a long time while not being used.
BINCO was supported by the kind donation of metal domes from Snaptron.
BINCO was project #19 of the Boldport Club.
1x 14-bit binary counter IC, Nexperia 74HC4020D,652
1x 555 timer IC, TI TLC555QDRG4
11x Reverse mount green SMD LEDz, Kingbright KPTL-3216CGCK
1x N-channel MOSFET SMD transistor, ON Semi BSS123
16x 1.5KΩ 0805 resistors, Multicomp MCWR08X1501FTL
2x 47KΩ 0805 resistors, Multicomp MCWR08X4702FTL
2x 1µF 0805 capacitors, Multicomp MC0805F105Z160CT
1x CR2032 battery clip, Multicomp BC-2001
1x Dome (reset), Snaptron GX05300
1x Double action dome (count slow/fast), Snaptron DT10340N
1x Dome (on/off), Snaptron F10450
1x Piece of adhesive sheet