5-30 minuts timer circuit using IC 555
This is timer circuit uses a 555 IC timer. it small,compact,portable. For the snooze alarm by buzzer when some 5 to 30 minutes. It make easy with pcb layout
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March 24, 2019
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The digital clock circuit that electronic amateurs are most interested. And The clock ICs that most popular are LM8361, MM5387, [...]
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The Alarm Countdown Timer circuit Diagram
Simple 555 countdown timer circuit with alarm
The red and green LEDs will flash alternately and when time to setting the buzzer will loudly sound each time LED flashes.
October 23, 2010