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## Make this Gravity LED Lamp Circuit

Gravitational force is an awesome source of energy, amply available on this planet, and easily accessible, however, nobody yet has been able to convert this force into free energy (perpetual), simply because that's impossible.

## Make a 1 watt LED Lamp using 20mA LEDs

Today 1 watt LEDs are very poplar and these are utilized in most LED lamp applications. Although these are extremely efficient in terms of light intensity levels and current consumption, these high watt LEDs require a formidable heatsink in order to keep them functioning correctly and optimally.

## Simple Musical Door Bell Circuit

A very simple musical door bell circuit can be built and installed in homes, the design features a replaceable music chip option, and an adjustable ringtone duration, as per the user preference, we'll learn the entire circuit procedure through the following article.

## Mains Voltage Stabilizer Circuit without Relays

The article explains a solid state switch-mode mains voltage stabilizer circuit without relays, using a ferrite core boost converter and a couple of half-bridge mosfet driver circuits. The idea was requested by Mr. McAnthony Bernard.

## 3.3V, 5V Voltage Regulator Circuits

In this post we learn to make 3.3V, 5V voltage regulator circuits from higher voltage sources, such as 12V or a 24V source without ICs

In this post we'll learn about a simple circuit which allows a manual adjust feature for the spark timing of a motorcycle's CDI either to achieve an advance ignition, retarded ignition or simply a normal timed ignitions.

## How to get Free Energy from a Pendulum - Overunity Circuit

In this post we'll try to understand regarding how a pendulum mechanism can be used for achieving overunity and generate electricity in the form of free energy.

## How to Make HHO Fuel Cell in Automobiles for Enhancing Fuel Efficiency

In this post we'll try to investigate the making of HHO gas in automobiles for enhancing their mileage by approximately 50% or more, that means a reduction of petrol or diesel consumption by the same amount.

## How to Generate HHO Gas Efficiently at Home - Full Tutorial

Converting water into free HHO fuel gas can be extremely inefficient if ordinary means are employed for the involved electrolysis of water. In this post we try to investigate a circuit design which might be capable of extracting this gas from water using minimum energy and with high efficiency.

## Zero Crossing Controlled Surge Free Transformerless Power Supply

The post explains the importance of a zero crossing detection in capacitive transformerless power supplies in order to make it completely safe from the mains switch ON inrush surge currents. The idea was proposed by Mr. Francis.

## PWM Solar Battery Charger Circuit

This simple, enhanced, 5V zero drop PWM solar battery charger circuit can be used in conjunction with any solar panel for charging cellphones or cell phone batteries in multiple numbers quickly, basically the circuit is capable of charging any battery whether Li-ion or Lead acid which may be within the 5V range.

## Simplest PWM Modified Sine Wave Inverter Circuit Using IC TL494

A very simple yet highly sophisticated modified sine wave inverter circuit is presented in the following post. The use of the PWM IC TL494 not only makes the design extremely economical with its parts count but also highly efficient and accurate.

## Music Triggered Amplifier Speaker Circuit

The circuit idea explained below enables a power amplifier loudspeakers to switch ON only when there's an input music available, otherwise it makes sure that the loudspeakers remain shut off. The idea ws requested by Mr. David Alda.

## RGB LED Color Mixer Circuit

The post explains a simple LM317 IC based RGB 3 watt LED color mixer circuit, which can be used for demonstrating the color mixing effects of red, blue, green colors as specified in the standard color charts. The idea was requested by Mr.Praveen.

## What's PWM, How to Measure it

PWM stands for pulse width modulation which signifies the variable nature of the pulse widths that may be generated from a particular source such as a discrete IC, MCU, or a transistorized circuit.
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## Ultrasonic Sound Sensor Alarm Circuit

This article discusses a simple ultrasonic sound sensor alarm circuit which may be appropriately set for detecting sound pressures well above the normal human listening capacity, that may range from 20 kHz and over.

## GHz Microwave Radar Security Alarm Circuit

The post explains a GHz microwave radar security alarm circuit which is designed to detect an intruder within the critical zone only while it's moving, static objects produce no effect for the sensor.

## Using a Microwave Sensor or a Doppler Sensor

In this article we study the microwave sensor IC KMY 24 and try to understand its main features and its pinout implementation details.