Showing posts with label Alarm. Show all posts
Showing posts with label Alarm. Show all posts
Cheap Bicycle Alarm Schematics

Cheap Bicycle Alarm Schematics

The author wanted a very cheap and simple alarm for some of his possessions, su…
Written By Thursday, September 17, 2020
Simple Door Alarm

Simple Door Alarm

This circuit emits a beep and/or illuminates a LED when someone touches the doo…
Written By Tuesday, September 15, 2020
Car Anti-Theft Wireless Alarm

Car Anti-Theft Wireless Alarm

This FM radio-controlled anti-theft alarm can be used with any vehicle having 6…
Written By Saturday, September 5, 2020
Power Supply Failure Alarm

Power Supply Failure Alarm

Most of the power supply failure indicator circuits need a separate power-suppl…
Written By Friday, August 28, 2020
Four-in-One Burglar Alarm

Four-in-One Burglar Alarm

In this circuit, the alarm will be switched on under the following four differe…
Written By Saturday, August 22, 2020
Long-Range Cordless Burglar Alarm

Long-Range Cordless Burglar Alarm

This long-range cordless burglar alarm circuit makes use of a cordless telephon…
Written By Friday, August 21, 2020
Make a General-Purpose Alarm

Make a General-Purpose Alarm

How to make a general-purpose alarm. The alarm may be used for a variety of app…
Written By August 21, 2020
Automatic Night Lamp with Morning Alarm

Automatic Night Lamp with Morning Alarm

This circuit automatically turns on a night lamp when bedroom light is switched…
Written By Wednesday, August 19, 2020
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