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## Simple Solar LED Street Light System using LM338 IC

The discussed circuit for a simple solar LED street light system is specifically designed for the new hobbyist who can build it simply by referring to the pictorial schematic presented here.

## Submersible Timer Circuit with Pause Feature during Mains Failures

The post explains a submersible pump timer circuit programmed to cycle at 60 minute interval for watering the fields consistently. It also includes a time "memory" feature which ensures that the timer "remembers" the counting during mains failures, and restarts exactly from where it was interrupted when mains power is restored. The idea was requested by Mr. Siva.

## Diesel Generator RPM Controller Circuit

The post discusses a diesel generator RPM controller circuit for boats using PWM technique and also using a simple triac shunt circuit. The idea was requested by Mr. Dave.

## Calculating Capacitor Charge/Discharge Time using RC Constant

Capacitor charge and discharge periods is usually calculated through an RC constant called tau, expressed as the product of R and C, where C is the capacitance and R is the resistance parameter that may be in series or parallel with the capacitor C. It may be expressed as shown below:

## Stepper Motor Explained!

In this post we are going to learn about stepper motor. We will be exploring what stepper motor is, its fundamental working mechanism, types of stepper motor, stepping modes, and lastly its advantages and disadvantages.

## Greatest Myths about LED Lighting

LED lighting products are relatively new for the commercial market and as with any new product, they have to deal with doubt and negative comments from consumers’ side. There just is a lot of false information about LED lights that creates many misconceptions about them. So here are the greatest myths about LED lamps and also some facts that show how untrue these myths are.

## Automatic Triac Changeover Circuit for Inverter/Mains

The post discusses a simple automatic triac changeover circuit from mains to inverter and vice versa for ensuring a well isolated inverter mains transfer for the load. This is to eliminate the possibility of the grid energy meter recording the inverter supply consumption in the utility bill. The idea was requested by Mr. Puneet

## 48V 3KW Electric Vehicle Circuit

The post explains a few important parameters related to the making of  a 48V 3KW electric vehicle using solar panel, including a full fledged circuit diagram for the same. The idea was requested by Mr. Sreejith.

## Automatic Food Warmer Lamp Timer Circuit for Hotels and Restaurants

The post discusses a simple food warmer lamp timer circuit for restaurants and hotels which can be used for automatically switching OFF the lamps after a predetermined time whenever the food under the lamps are idle or in the absence of an interaction under the lamps, thus saving precious electricity. The idea was requested by Mr. Mike Sunny.

## LED Strip Light Controller Using Arduino

In this post we are going to construct LED strip controller circuit using Arduino, which can turn ON/OFF and decrease/increase brightness of LEDs using ordinary IR (Infrared) remote.

## Transistor Stray pickup False Triggering Problem

The article explains how to make any BJT or mosfet based circuit free from stray signal pickup and false triggering by simply attaching a filter resistor or a capacitor across their base/emitter or gate/source terminals. The problem was raised by Mr.Henrik.

## 3 phase Solar Submersible Pump Inverter Circuit

The post explains a simple  3 phase solar submersible pump inverter circuit which can be made by configuring a few ICs and a few power devices. The idea was requested by Mr. Lufono and Mr. Sami.

## Understanding Motorcycle Voltage Regulator Wiring

The article provides a detailed explanation regarding the various voltage regulator wiring configurations used in motorcycles. The article was submitted by Mr. Abu-Hafss.

## How to Interface Servo motors with Arduino

In this post we are going to learn what servo motor is, how it functions, how to interface with microcontroller and what make this motor special from other motors.

## Two Pipe Water Pump Valve Controller Circuit

The article explains how to control a two pipe submersible pump valve to ensure that the pipe bringing in the municipal water is always given the main preference to the bore-well water source. The circuit is also equipped with a tank overflow cut-off feature. The idea was requested by Mr. Prashant.

## Simple Arduino Modified Sine Wave Inverter Circuit

In this post we are going to construct a modified sine wave inverter using Arduino. We will explore the methodology of the proposed sine wave inverter and finally, we will take a look at simulated output of this inverter.

## Free Electricity Geneartor in Cars, Motorcycles or any Vehicle

The following free electricity generator circuit in cars and motorcycles was inspired from the oscillating dolls, and idols inside vehicles which may be seen constantly swaying and moving due to the vehicle's uneven motion or whenever brakes are applied.