FM adaptor circuit for car stereo

jacky April 7, 2010 7 Comments
Description. With this compact FM adaptor circuit plugged into the audio out of your cassete player or i Pod out put,you can listen your favorite music on your car stereo.This circuit is very useful if your car stereo doesnot have an auxillary in socket.The circuit is nothing buy  an short range  FM transimitter. The FM transmitter circuit is based on low power NPN transistor 2N2222.The tank circuit consisting of L1 & C1 producess the necessary oscillations at the collector...
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Shock alarm circuit

admin April 7, 2010 22 Comments
 Description. Here is a simple shock sensitive alarm circuit that has many many applications fro home to automobiles.The main application of this circuit is to use it as an anti theft alarm in automobiles.A peizo electric sensor is used as the shock sensor which has to mounted on the door which you have to protect. Here the IC1  LM 3558 is wired as an inverting Schmitt Trigger.The POT R1 sets the threshold voltage of the circuit.R1 is used as...
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Automatic headlight dim switch.

admin April 7, 2010 24 Comments
Description. With this cool circuit integrated to your cars headlight system , you can drive cool headed in high beam.The circuit will take over the duty of low beaming the headlight when vehicles approach against , and high beams the lights when they pass over. The circuit is based on a photo transistor(Q1) for sensing the approaching vehicles and transistor Q2 (BC177) for switching the relays for controlling the headlight.When the light from the opposite vehicle falls on Q2...
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Converting CD-ROM drive to audio CD player

admin March 8, 2012 7 Comments
Description. Here is the simplest scheme for converting a CD ROM drive of your computer to a Audio CD player. The minimum requirement for the player is that, it should have a audio output and skip button. Luckily most of the CD ROM’s are equipped with both of these.  The CD ROM drive needs two voltages, 12V & 5V for its operation. So the main objective is to build a suitable power supply for the CD ROM drive. The...
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Simple battery charger circuit

admin August 13, 2017 28 Comments
How to make a 12V battery charger at home? Description  Here is the circuit diagram of a simple and straight forward 12 V battery charger circuit with diagram. This circuit can be used to charge all type of 12V rechargeable batteries including car batteries. The circuit is nothing but a 12V DC power supply with an ammeter for monitoring the charging current. The two diodes forms a centre tapped full wave rectifier. The capacitor filters the rectifier output to...
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Voltmeter circuit using LED

admin November 7, 2018 20 Comments
Car Battery Voltmeter Circuit Description The main onjective of the car batter voltmeter circuit using LED is to work as a warning inducator using a voltmeter circuit to test the life of car batteries. A voltmeter, though can be bought from a store, is designed as a circuit to make the whole arrangement a lot more interesting. A voltmeter is basically a testing device that is used to measure the potential difference between two points of either AC or...
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Automatic Head Lights Turn Off Circuit

admin October 30, 2018 17 Comments
How cool is it to design an Automatic Car Head Lights Turn Off Circuit ? Well, I’ve always fascinated myself playing with car electronics. And today is my day! I’ve come up with a really cool circuit, where you can turn the car headlights “OFF” after a preset time. This cool circuit is designed using the popular NE 555 IC, and a bunch of associated components. You should be a little careful while testing this circuit actually in a...
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Automatic Wiper Control Circuit

jacky October 30, 2018 14 Comments
In this project, let’s learn about automatic wiper control using NE555 IC. As you all know, NE/SE 555 is one of the most common timer IC ever created in the world. There is absolutely no electronics enthusiast who has never played with the 555 IC. We’ve extensively covered 555 IC, where we have a big list of 555 based projects This circuit is pretty simple, where it has a 555 IC, a couple of passive components, a motor, two...
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