2 Tone Ringtone Generator Circuit

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 when a call is received. However with little modifications the IC can be easily utilized for normal applications, in circuits where a double tone alarm … Read more2 Tone Ringtone Generator Circuit

Earthquake Sensor Circuit – Seismic Sensor

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 that it is able to detect tremor of 4 on the Richter scale, yet remains unaffected to loud sounds or irrelevant bangs or noises. Introduction … Read moreEarthquake Sensor Circuit – Seismic Sensor

2 Simple Earth Leakage Circuit Breaker (ELCB) Explained

The discussed Earth leakage circuit breaker diagrams will silently monitor the electrical condition of your appliances and the Earth connection of your house. Here we will learn 2 designs, first using transistors only and the second using IC LM324. Introduction If anything goes wrong with them it will instantly switch off the mains and stop … Read more2 Simple Earth Leakage Circuit Breaker (ELCB) Explained

A Homemade Fence Charger, Energizer Circuit

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 is used to generate the required frequency to drive the ignition coil. Another astable is used to control the pulses supplied to the fence. Protecting … Read moreA Homemade Fence Charger, Energizer Circuit