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You are here: Home / Archives for Security and Alarm

Make this Solar Powered Fence Charger Circuit

Last Updated on March 15, 2020 by Swagatam 105 Comments

A Fence charger or energizer is an equipment which is used for charging(electrifying) a fence or a boundary in order to protect the inside premise from human or animal interventions. […]

Filed Under: Security and Alarm

2 Tone Ringtone Generator Circuit

Last Updated on June 15, 2019 by Swagatam 4 Comments

The IC LS1240A from SGS Thompson is specifically designed for generating a 2 tone ringtone generator circuit. Thus the IC specifically becomes suitable for landline telephones for producing the ringtones […]



Filed Under: Security and Alarm

Earthquake Sensor Circuit – Seismic Sensor

Last Updated on January 25, 2020 by Swagatam 41 Comments

The article shows an earthquake sensor circuit idea which incorporates an innovative way of detecting the minutest of shocks caused by a possible earthquake tremor. The circuit is so sensitive […]

Filed Under: Security and Alarm

Cell Phone Controlled Door Lock Circuit

Last Updated on July 3, 2019 by Swagatam 49 Comments

Controlling your door lock through your personal cell phone was never this easy. Learn how to build a simple electronic circuit that will help in converting your ordinary door lock […]

Filed Under: Security and Alarm, Transmitter Circuits

2 Simple Earth Leakage Circuit Breaker (ELCB) Explained

Last Updated on August 29, 2019 by Swagatam 25 Comments

The discussed Earth leakage circuit breaker diagrams will monitor the leakage current level of the earthing line of your house electrical sockets and will trip the appliances as soon a […]

Filed Under: Mini Projects, Security and Alarm

A Homemade Fence Charger, Energizer Circuit

Last Updated on February 5, 2020 by Swagatam 97 Comments

The electric fence charger circuit presented here is basically a high voltage pulse generator. The super high voltage is derived from a commonly used automobile ignition coil. An astable multivibrator […]

Filed Under: Security and Alarm



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