Automatic Fan Controller

Here is a simple Circuit to automatically switch ON and control a speed of a Fan. For the simplicity of the circuit  we have not included control to threshold level.  Circuit Diagram of Automatic Fan Controller Working: this project uses IC LM35 as a sensor for detecting accurate centigrade temperature. Output voltage of this sensor is linearly proportional...

Touch Switch

Touch Switch Project THEAFS ARE ATTRACTED TO EXPENSIVE THINGS WHEN THEY COME IN OUR HOUSES. WE CAN PROTECT OUR PRODUCT OR THING BY MAKING THEM TOUCH PROOF OR WE CAN STOP ANY UNIDENTIFIED PERSONS ENTRY IN OUR HOUSE BY MAKING DOOR AND WINDOW TOUCH PROOF.THIS CIRCUIT ALERT US WHEN ANY THEAF COME TO STOLE PRODUCTS FROM OUR HOUSE OR TOUCH ANY METALLIC THING AT DOOR / WINDOW...

Fire Alarm

Fire Alarm Project Here is a simple circuit which can be used as a Fire Alarm. 3 Volt is enough to operate this project. There is not much to the circuit. The IC UM66 is connected to its supply and its output is fed to a transistor for amplification. UM66 is a complete miniature tone generator with a ROM of 64 notes, oscillator and a preamplifier. For amplification we...

Clap Switch

Here is a Hobby Circuit for electronics hobbyists that can switch on & off a light, Fan, Radio etc., by the sound of clap. The sound of clap is received by a small microphone that is shown biased by resistor R1 in the circuit. The microphone changes sound wave in to electrical wave, which is further amplified by Q1. Transistor Q1 is used as common emitter circuit...

Rain Alarm

GIVES BEEP WHEN WATER IS IN CONTACT WITH THE WIRERain Alarm Project Here is an interesting electronics project to detect if there is raining or not. Same circuit can also be used as water level indicator or as a tank overflow indicator. Working: Water is a conductor of electricity. When water is in contact with the probe then there is a flow of current toward the...

Automatic Street Light

An introduction: Needs no manual operation for switching ON and OFF. When there is a need of light it automatically switches ON. When darkness rises to a certain level then sensor circuit gets activated and switches ON and when there is other source of light i.e. daytime, the street light gets OFF.  The sensitiveness of the street light can also be adjusted. In our...

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