There are some power saver devices shown in TV advertisements that they can save electricity bills. But, does they really cut down electricity bills as advertised? Does they really cut […]
Automatic Inverter and Mains Supply Changeover Circuit
There are many types of Inverters to build. Once you build one inverter, you can light bulbs, or other electrical equipments by battery. But, you had to do a boring […]
Reuse Old Mobile Phone Battery for LED lighting
Do you have old unusable Mobile battery? Normally mobile batteries have a lifespan of 2-5 years under normal usage. But then we have to replace them. Nowadays there are cheap […]
Simplest Modified SineWave Inverter without Microcontroller
There are basically three types of Inverters in the market. These are, Squarewave Inverter Sinewave Inverter Modified Sinewave Inverter Waveform Comparison Most of the inverters in the market uses modified […]
2$ DIY Low cost USB Oscilloscope
Were you going to buy a 100-1000$ valued USB oscilloscope? No need of that when you can make one at just 2$. An Oscilloscope is a device which can analyze […]
100VA to 220VA MOSFET based Inverter kit circuit
This is a basic square-wave oscillator based inverter kit. Based on the 4047 I.C oscillator, we discussed here, it is a finalized PCB version of that inverter with MOSFETs. Here […]
Professional PCB making at home
We know that PCB has a great role in our circuits. It not only keep parts arranged, but also makes the connections smartly navigated so that future parts change requires […]
Cheapest Mobile signal booster external antenna
There are some pretty signal boosters available in market which can only boost or amplify weak signal. But these products can’t bring unavailable towers. You can buy external antenna for […]
Cheapest High power LED driver circuit diagram
If you're looking for a simple high power LED driver circuit, then it's here. Driving a high power LED is not that easy. First you've to apply proper voltage to get the […]
Miniature electric fence circuit used in Mosquito Racket
There are these types of mosquito killer racket are easily available in market at some 150 rupees. This consist an electric fence in the bat portion which has 5000-10,000 volts […]
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