FI-MUNI_People-counter-board Simple board with LED displays, decade counter, BCD to 7-segment decoder Simulation of circuit in Every Circuit: first simulation (just one counter in circuit) second simulation (two counters in circuit) Parts 4x 74LS90 - Decade counter (datasheet) 4x 74LS47 - BCD to 7 segment decoders (datasheet) 4x 7 seg. display 1x 74LS08 - Quad and2 (datasheet)