Class D Amplifier Circuit Using IC 555

Oct 29, 2013

A Class D amplifier also termed as a digital amplifier uses pulse width modulation technology for amplifying the fed small amplitude analogue music signal. The main benefits of this type of amplifier are high efficiency, low cost, with the only drawback being the association of distortion if not cleaned with correctly calculated filters at the output.

Customizing a Homemade Pellet Burner Circuit

Oct 28, 2013

In one of my previous posts I discussed a simple homemade pellet burner circuit which incorporated various timer stages and other control stages for carrying out some of the standard pellet burner mechanism operations automatically without any human intervention.

Simple Induction Heater Circuit - Hot Plate Cooker Circuit

The proposed induction heater circuit exhibits the use of high frequency magnetic induction principles for generating substantial magnitude of heat over a small specified radius.

Simple TV Transmitter Circuit

Oct 27, 2013

The TV transmitter circuit presented in this post incorporates the European standard FM frequency for audio and Video up-links.

Making a 3KVA Modified Sine Wave Inverter Circuit

Oct 24, 2013

The post investigtes a 3kva sine wave inverter circuit prototype made by Mr. Marcelin using only BJ transistors instead of the conventional mosfets. The PWM control circuit was designed by me.

Universal Multi-spark Enhanced CDI Circuit for Automobiles

Oct 21, 2013

The post explains an enhanced multi-spark CDI circuit which is universally suited for all types of automobiles. The unit can be built at home and installed in a particular vehicle for achieving greater speed to fuel efficiency.

Make this Simple FM Radio Circuit Using a Single Transistor

Oct 16, 2013

When it comes to making an FM receiver it's always thought to be a complex design, however the one transistor simple FM receiver circuit explained here simply shows that it isn't the case after all. Here a single transistor acts as a receiver, demodulator, amplifier to constitute a wonderful tiny FM radio.

Make this 3 Phase Inverter Circuit

Oct 14, 2013

The post discuses the how to make a 3 phase inverter circuit which can be used in conjunction with any ordinary single phase square wave inverter circuit. The circuit was requested by one of the interested readers of this blog.

Transformerless Power Supply Circuit with Surge Free Zero Crossing Switching Feature

A simple yet smart solution to the ever lasting surge problems in compact transfomerless power supplies can be effectively implemented via a zero cross switching circuit concept, wherein the input power from the mains is allowed to enter the circuit only during the zero crossings of the AC signal, thereby eliminating the possibility of surge inrushes. The idea was suggested by one of the avid readers of this blog. 

Modified Sine Wave Inverter Circuit with Waveform Images Verified

Oct 12, 2013

The following post discusses a simple modified sine wave inverter circuit with waveform images, confirming the credibility of the design. The concept was designed by me, the waveform being confirmed and submitted by Mr. Robin Peter.

12V, 24V, 1 Amp Mosfet SMPS Circuit

Oct 10, 2013

The post investigates a cheap Chinese made 12V, 1 amp mosfet based smps circuit which can be modified into 24V 1 amp, or 12V 2 amp smps circuits also. The mosfet used is STB9NK60Z which is a highly advanced, rugged 600V 7A device specially manufactured for high, unpredictable, voltage environment circuit applications.

Stabilized Transformerless Power Supply Circuit with Relay Driver Stage

Oct 9, 2013

In this post we discuss an enhanced transformerles power supply circuit design which consists a well stabilized and regulated DC stage along with a relay driver stage which operates through an external pulse. he idea was suggested by Mr. Reza.

Simple Adjustable Industrial Timer Circuit

Oct 8, 2013

The post discusses a simple and effective industrial timer circuit which can be universally used for most industrial and home timer based applications. The idea was requested by Mr. Vasilis K.

How to Make an Ultrasonic Weapon (USW) Circuit

Oct 7, 2013

With rising crime in today's society, especially against woman, carrying some sort of effective weapon has become quite imperative.

Bicycle Dynamo Battery Charger Circuit

Oct 6, 2013

The post explains a simple constant current bicycle dynamo battery charger circuit which can be used for charging a Li-Ion or Ni-Cd battery from a bicycle dynamo electricity source. The idea was requested by Mr. Saif Khan.

Low Battery Cut-off with Indicator Circuit for Cell Phone/Tablet Battery Pack Chargers

Oct 5, 2013

The post explains a simple yet effective low battery cut off with indicator circuit which can be integrated with cell phone/tablet charger battery packs in order to monitor and avoid battery draining below a set threshold. The idea was requested by Mr. David.

Make this Diwali, Christmas Running, Chasing Light Circuit

The post explains a simple, compact, transformerless light chaser circuit which can be used for illuminating mains operated lamps in a sequential chasing manner. The chasing effect can be altered by means of pot controls. The system can be used as a decorative lighting during festive seasons like in Christmas and Diwali. The idea was requested by Mr. Ashish.

Learn Electronics for Free - Become a Self-made Electronic Engineer

Oct 3, 2013

Dear friends, you can learn electronics for free here, just follow the following three easy steps and start posting your specific questions directly in this blog. Now no need of posting your precious queries in uncomfortable comments boxes, get page Admin facility here and start making your own relevant electronic tutorials, all answered and updated by me appropriately.

Accurate Proximity Detector Circuit

Oct 2, 2013

The post explains a simple infrared (IR) based motion detector circuit which incorporates the IC LM567 for ensuring reliable and foolproof operations. The circuit also works as a obstacle or a proximity detector circuit.

Sound Activated Automatic Amplifier Mute Circuit

Oct 1, 2013

The following article presents a simple sound operated/activated amplifier muting circuit which enables the amplifier to silence itself as soon a voice or an external sound occurs across the detector MIC. The circuit was requested by Mr. Seok Sothea.

Pure Sine Wave Inverter Circuit Using IC 4047

A very effective pure sine wave inverter circuit can be made using the IC 4047 and a couple IC 555 together with a few other passive components. Let's learn the details below.

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