Electronic Load Controller Circuit Using Triac Dimmer Phase Chopping Concept

Mar 31, 2014

In the previous post we learned an effective electronic load controller circuit using a sequential multiple dummy load switcher concept, here we discuss a much simpler design of the same using a triac dimmer concept and with a single load.

Electronic Load Controller (ELC) Circuit for Windmill Generators

The articles explains a home-built ELC circuit which may be used for regulating the speed and frequency of a windmill generator unit. The idea was requested by Mr. Nilesh Patil.

UPS Relay Changeover Circuit with Zero crossing Detector

Mar 30, 2014

The following post explains a simple relay changeover circuit with zero crossing detector which may be used in inverter or UPS changeover applications, for switching-over the output from AC mains to inverter mains during inappropriate voltage conditions. The idea was requested by Mr. Deepak.

Fast Battery Charger Circuit

Mar 24, 2014

While checking for a fast battery charger circuit on the web, I came across a couple of designs which were not only useless but dangerous too. It seemed that the concerned authors had no idea what a fast charger actually needs to be like.

1.5 watt Transmitter Circuit - 500 meter Range

Mar 20, 2014

This little transmitter will allow you to communicate, chat, send music transmission on any standard FM Radio tuned within the existing band, across a radial distance of not less than 500 meters or half a kilometers.

1000 watt UPS Circuit

Mar 19, 2014

In this article we discuss a 1000 watt UPS circuit powered with a +/- 220V input, using 40 nos of 12V/4 AH batteries in series. The high voltage operation renders the system relatively less complex and transformerless. The idea was requested by Aquarius.

Solar Charger Using Flyback Converter Circuit

Mar 15, 2014

The post analyzes a solar charger circuit which includes an I/V tracking feature for implementing an efficient battery charging operations.

Programmable Humidity Controller Circuit

Mar 14, 2014

The simple programmable humidity sensor circuit explained in this article can be used for controlling or maintaining a suitable level of humidity inside a close premise. The circuit could be used in poultry farms or similar areas where humidity level becomes crucial for keeping the animals healthy. The idea was requested by Mr. Tanvir

Mosquito Swatter Bat Circuit

Mar 13, 2014

Mosquitoes are a big menace to humankind and these are present in every corner of the world. A cool way of avenging yourself could by eliminating these "devils" through electrocution. A mosquito swatter bat is designed just for this. Let's learn how to build its electronic circuitry. The idea was requested by Mr. kathiravan d.

Make this Red LED Sign Circuit

Mar 12, 2014

The post presents a simple transformerless red LED sign circuit which can be made even by a novice. The circuit uses only a few high voltage capacitors, two resistors, and a few red LEDs.... nothing more. The circuit idea and the images were submitted by Mr. John Hungerford.

How to Make Car LED Bulb Using 3020 SMD LEDs

Mar 11, 2014

Typically all car turn signal lamps are around 12 to 20 watt rated which are traditionally incandescent bulb types and produce much lower light intensities compared to LED lights. Here we learn how these lamps can be replaced with high efficiency, high intensity car LED bulbs.

Simple Automatic Plant Watering Circuit

Mar 5, 2014

The post explains a simple yet effective automatic plant irrigation system circuit which can be used for automatically sensing soil humidity and triggering a water pump when the ground gets parched below a predetermined level (adjustable).

12V, 5 Amp Transformerless Battery Charger Circuit - SMPS Based

Mar 4, 2014

In this article we study a simple flyback converter design which is implemented as an SMPS 12V, 5amp battery charger power supply. 

Linear Hall-Effect Sensors Explained

Mar 1, 2014

Linear Hall-effect ICs are assigned with a feature which enables them to respond to both north and south poles of a magnet and over a wide range of magnetic strengths.

Transistor Bistable Flip Flop Circuits

In this article we learn a couple of transistorized flip flop circuits which can be used for toggling a load ON/OFF through a single push button trigger. These are also called transistor bistable circuits.

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