Fastest Finger First Indicator

348

03:57:11

This circuit is intended for Quiz competition for two teams.You can extend by adding more 555 IC.IC1 trigger(Quiz contestant Team1)and IC3 buzzer Push switch should be on one push switch(dual). IC2 trigger(Quiz contestant Team2) and IC3 buzzer Push switch should  be on one push switch(dual). You may use 556 IC intead of 555 to avoid circuit complication.

published 7 years ago

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