Counter Wall 7 Segment Circuit Diagram Schematic

Counter Wall 7 Segment Circuit Diagram Schematic

This simple adverse can be acclimated to calculation pulses, as the base for a chump adverse (like you see at the doors of some stores), or for annihilation abroad that may be counted. The ambit accepts any TTL accordant argumentation signal, and can be broadcast calmly (see Notes).

Notes

1. All pulses to be counted are to be TTL compatible. They should not exeed 5V and not abatement beneath ground.

2. You can add added digits by architecture a additional (or third, or fourth, etc…) ambit and abutting the pin 11-6 alliance of the 74LS90 and 74LS47 to pin 14 of the 74LS90 in the added circuit. You can accumulate accretion this way to as abounding digits as you want.

Part .Total Qty. Description Substitutions

R1-R7 . 7 . 470 Ohm 1/4 Watt Resistor

U1 . 1 . 74LS90 TTL BCD Counter IC 7490,74HC90

U2 . 1 . 74LS47 TTL Seven Segment Display Driver IC 7447,74HC47

DISP1 . 1 . Common Anode 7 Segment LED Display

MISC . 1 . Board, Sockets For ICs, Wire