The only electronic website that replies to every comment, and addresses all circuit related issues.

How a Relay Works

In this post we learn comprehensively regarding how relay works in electronic circuits, how to identify its pinouts of any relay through a meter and connect in circuits.

How to Make Your Own Active Loudspeakers - Speaker Amplifier

With the advent of ultra modern cell phones, now it has become possible to store huge music data and listen to them with just a flick of your finger. But listening to music becomes significantly pleasing only if it’s hugely amplified and reproduced over active loudspeakers or with systems incorporating a speaker amplifier circuit.

How to Understand and Use Capacitors in Electronic Circuits

Seen those colorful, cylindrical and chocolate shaped parts on a PCB? These may be actually the capacitors of different makes and brands used extensively in electronic circuits. To know more regarding what is a capacitor, just go through the article.

How to Understand Diodes and Build a Bridge Rectifier


Diodes are one of the important electronic components used for rectifying an AC into DC. Diodes have the property of allowing DC through a specified direction and rectifying AC across its pin outs. Let’s learn the components more elaborately.
Diodes are tiny electronic components which are normally recognized by their cylindrical black colored body having a white band at the edge of their body. 

How to Understand and Use Transistors in Circuits

Transistors are the building blocks of all semiconductor devices found today. If there wouldn’t be transistors there wouldn’t be any ICs or any other semiconductor component. Even ICs are made up of millions of closely knit transistors which constitute the features of the particular chip.

Simple Hobby Electronic Circuits

A few of the interesting and useful hobby electronic circuit diagrams already published in this blog have been selected and compiled here for quick reference and understanding.

NiMH, NiCd Battery Charger Circuit

A single state-of-the-art chip, a transistor and a few other inexpensive passive components are the only materials required for making this outstanding, self regulating, over charge controlled, automatic NiMH, NiCd battery charger circuit. Let’s study the whole operation explained in the article.

How to Make a Simple Metal Detector Circuit Using IC CS209A

The principle of operation of the proposed metal detector circuit is quite basic yet very interesting. The detecting function is triggered by sensing the decrease in the Q level of the LC network associated with the circuit in the presence of a metal at a specified proximity level.

How to Understand Proximity Detector IC CS209A Pinouts - Datasheet Explained

The device CS209A is a bipolar monolithic IC specifically designed for metal detecting circuit applications. The IC fundamentally has a built-in oscillator stage, a couple of current regulator stages, a low level feed back circuit, and a few other relevant stages like peak detection/demodulation stage, a comparator stage and  a couple of complementary output blocks.

How to Make a Simple Frequency Counter Circuit

A very simple frequency counter circuit is shown below and can be easily built by any electronic enthusiast for the intended purpose. The circuit diagram was provided by Mr.Kapital through an order in Fiverr.com, I was asked to explain the functioning by him.

The Circuit can be understood with the following points: 

Simple Ignition Code Lock Circuit for Your Vehicles

This innovative circuit can be used for locking a vehicle’s ignition by typing a hidden code over the given micro switch keypads. So now you can use this simple code lock ignition circuit for probably securing your car from a possible theft. Alternatively the circuit may be used for any application requiring security or safeguarding from external intrusions and thefts.

How to Make a Ghost Detector Circuit

Do you believe in the existence of ghosts? Well some of you may answer positively while some may just nod their heads showing sheer skepticism regarding the issue. Whatever may be the reactions; nobody just can’t deny or ignore the responses delivered from the circuit explained in this article.

Wireless Li-Ion Battery Charger Circuit

Charging batteries through inductive wireless charging is one of the applications that’s becoming very popular and getting appreciated by the uses. Here we’ll study how to make a wireless Li-Ion battery charger circuit using the same concept.

How to Make an Outstanding Home Theater System Circuit

The article discussed here provides a simple, cheap home theater system circuit that may be built at home and used for the desired purpose. The results from this circuit design are outstandingly rich and have the capabilities comparable with the costly hi-end types available in the market.

How to Generate Electricity from Vegetables and Fruits - Making a Potato Battery

Alessandro Volta was probably the first man to devise the method and idea of generating electricity from electrolytic solutions. According to his concept, two dissimilar metals when brought in contact with an electrolytic solution would initiate electron movement across the two metals, joined externally together using a conductor.

Water Level Indicator with Controller Circuit

The circuit provided in this article performs a dual function of both, as an over head tank water level indicator circuit as well as an overflow controller. The indications of the rising water are provided by five LEDs, which light up sequentially in response to the rising water level inside the tank.

Simple Timer Circuit Using IC 4060

I have already discussed this IC comprehensively in one of my previous articles, everything regarding its pin outs have discussed there in detail. We studied there that the IC 4060 is specifically suited for timer applications and also as an oscillator. In this article we’ll study how a simple versatile timer can be built using the IC 4060.

Adjustable Timer Circuits Using IC 555

A timer is a device which produces a delay period after which an external connected electrical load is triggered. The produced time delay is normally adjustable and the user has the freedom to set the time period as desired. There are many ways of making simple timer circuits using different ICs and discrete components; here we discuss one such circuit using the ubiquitous IC 555.

Simple PWM Controlled DC to DC Cell Phone Charger Circuit – Science Fair Project

The explained circuit can be easily made at home by any school kid and used for displaying in his science fair exhibition. The circuit is a simple cell phone charger that may be operated in conjunction with any DC source, from a car or a motorcycle battery or from any ordinary 12 V AC DC adapter.

GSM Based Cell Phone Remote Control Switch Circuit


Now you can control any electrical gadget from any part of the world through your cell phone, that too without spending a penny for the individual commands. Whether it’s you vehicle, your basement door, your mansion gate or simply the air conditioner of your house, everything can now be switched by just a flick of your cell phone button. And mind you, it’s completely fool proof, meaning no false triggering is possible through any other cell phone signals, it works only through the owners cell phone commands.

How to Make an Electronic Toggle Switch Circuit

A toggle switch refers to a device which is used for switching an electrical circuit ON and OFF alternately whenever required. Normally mechanical switches are used for such operations and are extensively employed wherever electrical switching is required. However mechanical switches have one big drawback, they are prone to wear and tear and have the tendency of producing sparking and RF noise.

How to Generate Electricity from Sea Water - Simple Experimental Project

Just like wind and sun, sea is another example of massiveness and a potential raw energy source that may be harnessed for acquiring electrical power. Yes, just as solar or wind power, sea surfs can also be effectively dimensioned and converted for generating electricity. How? We’ll learn in this article through one simple experimental set up.

Rain Sensor Circuit

This is a simple rain sensor circuit which can be built by a school grade student very easily and can be used for displaying its relatively useful feature, probably among his friends or in a science fair exhibition.