5-20 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
Digital Timer Alarms
CD4060 Timer Control Circuits with alarm, 19 seconds to 5 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, […]