IC 74LS90 including
14 receiving pulses to Chan
Chan 12,11,9,8 output data.
Legs 10 GND connection.
Leg 5 VCC connection
is not used 13.4 Chan.
Chan 2,3,6,7 RESET
Legs 1 receiving overflow alarm clock, lED displays from 9 to 0. for every 1 pulse counting on it forward 1 and is encoded into 4 feet. When the count to 10, then it automatically resets and returns to the original
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