Alarms / Indicators

Alarms / Indicators

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		Simple Security Wire Loop Alarm Circuit	View 491
		A wire loop is used to protect valuable objects in this simple alarm circuit.

		Front Desk Service Beeper Circuit	View 350
		Often a simple mechanical bell is used by a customer at a store or hotel lobby...

		BASEMENT DOORBELL BEEPER	View 236
		If you can't hear your doorbell when you are in your basement try this circuit.

		ANOTHER VERY LOUD PIEZO ALARM BEEPER	View 243
		This is yet another beeper circuit that really draws attention. It sweeps the drive frequency slightly to produce a very annoying sound.

		3v Sweeping Siren Alarm	View 237
		A while back I was challenged by a visitor to the website. He needed a very loud sweeping siren type audio sound generator powered by 3v.

		Car Alarm	View 760
		This is Battery charger Alarm Circuit it connects between Charger and Battery .

		Battery Charger Alarm	View 315
		This is Battery charger Alarm Circuit it connects between Charger and Battery .

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