Incoming Phone Ring Light Flasher

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Model No: 212 A circuit is designed which flashes a light whenever there a call in phone. The circuit uses ...
Model No: 212 A circuit is designed which flashes a light whenever there a call in phone. The circuit uses an Optoisolator and relay is used to make the load ON and OFF driven by a transistor. This system can be very useful in a situation where there is lots of noise and it is impossible to hear the phone, such as a workshop, factory etc. The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier. The ripples are removed using a capacitive filter and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of the microcontroller and other components. For more details visit www.efxkits**** or www.facebook****/edgefx
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