This temperature alarm circuit permits a concurrent checking of a maximum of four temperatures. The individual detectors are attached to the main control unit by using a set of wires. […]
Single IC High Power Siren Horn Circuit
You might have come across may great siren circuits from this website, however this siren circuit has its own advantages such as a high gain and high power output along […]
Automatic LDR Switch Circuit with Flashing Lamp
This simple flashing LED light will begin flashing as soon as darkness sets in, and will shut off in the morning when day light arrives back. The operation of the […]
Bicycle Light and Alarm Circuit
The post illustrates a simple bicycle light circuit which can be used as a normal front/back indicator lights, and also as an emergency alarm signal such as an SOS signal. […]
Dog Barking Sound Simulator Circuit
In this post we learn how to make a simple dog barking sound generator, which will simulate an exact dog bark sound through an electronic circuit. The music synthesizer was […]
Simple Burglar Deterrent Circuit
The basic principle applied to create burglar deterrent circuits the world over is to detect an unwarranted presence and ring an alarm or effect some kind of activity to alert […]