This simple 20 watt home tube light circuit will work with any 12V battery and uses very few components yet is able to produce a reasonable amount of white light. The components used are very common and can be easily procured from the local electronic retailer. The idea is simple, the secondary winding of Tr1 […]
Archives for December 2011
Automatic Vehicle Headlight Dipper/Dimmer Circuit
The circuit described here can be built and used in your vehicle for an automatic dipping and dimming operation of the vehicle headlamps, in response to the intense lights coming from an opposite vehicle headlamps. What’s a Dimmer/Dipper in Automobiles An automobile headlight dimmer/dipper is a circuit which automatically switches the headlight intensities of vehicles arriving from […]
How to Use LM317 for Making a Variable Power Supply Circuit
In this post I will elaborately explain how to build a simple LM317 based adjustable power supply circuit using minimum number of external components. As the name suggests a variable power supply circuit provides the user with a range of linearly varying output voltages through a manually controlled potentiometer rotation. A LM317 is a versatile […]
AC 220V/120V Mains Surge Protector Circuits
Voltage spikes can sometimes be a big nuisance as far as the safety of the various electronic appliances are concerned. I have explained how to make a simple AC Mains surge protector circuits at home. What is a Surge Protector A surge protector is an electrical device which is designed to neutralize minor electrical spikes […]
Simple Peltier Refrigerator Circuit
In this post I have explained a straightforward procedure for building a simple refrigerator using Peltier device for generating the required cooling effect inside the fridge. How Peltier Device Works We are all familiar with a Peltier device and know how it functions. A Peltier device is a 2-wire semiconductor device having two surfaces that […]
Automatic Voltage Stabilizer Circuit for TV sets and Refrigerator
Here we will study the design of a simple automatic mains AC voltage stabilizer which can be applied for safeguarding appliances like TV and refrigerators from fluctuating voltages. A voltage stabilizer is a device which is designed to sense inappropriate voltage fluctuations in AC mains supply inputs, and correct them to produce a stabilized voltage for the […]