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
CD4060 Timer Circuit 22 seconds to 4 hours
This is IC 4060 Timer circuit. When rises time that is set, Suppose set 5 minutes time. after all time to 5 minutes. the circuit will emit a sound of buzzer once. [...]
LM8365 alarm digital clock for beginners
The digital clock circuit board using LM8365,alarm and relay control, alert 2 times in 24 hour,backup battery power outage. Show dates, months or seconds [...]
LM8560 Digital clock circuit diagram with alarm
The digital clock circuit that electronic amateurs are most interested. And The clock ICs that most popular are LM8361, MM5387, [...]
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.