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New Circuit Projects

How To Calculate and Connect LEDs in Series and Parallel

Last Updated on November 7, 2023 by Swagatam 63 Comments

LED series

In this article I have explained how to calculate LEDs in series and parallel using a simple formula and configure your own personalized LED displays, now you don’t just have to wonder how to wire led lights? but actually can do it, know the details here. These lights are known not only for their dazzling […]

Filed Under: Electronics Theory Tagged With: Calculate, Connect, LEDs, Parallel, Series

Simple LED Tubelight Circuit

Last Updated on December 4, 2024 by Swagatam 88 Comments

LED2Btube252C2BMOV

An LED tube-light is lighting device built using high efficiency LEDs for illuminating a premise where it is installed, through the available AC mains supply. In this post I have explained the complete construction details of a simple LED light tube light circuit using 20 mA, 5 mm high bright white LEDs. The circuit can […]

Filed Under: Lamps and Lights Tagged With: LED, Simple, Tubelight

A Homemade Fence Charger, Energizer Circuit

Last Updated on November 7, 2023 by Swagatam 156 Comments

The electric fence charger circuit presented here is basically a high voltage pulse generator. The super high voltage is derived from a commonly used automobile ignition coil. An astable multivibrator is used to generate the required frequency to drive the ignition coil. Another astable is used to control the pulses supplied to the fence. Protecting […]

Filed Under: Security and Alarm Tagged With: Charger, Energizer, Fence, Homemade

Transformerless Automatic Night Lamp Circuit

Last Updated on January 3, 2024 by Swagatam 89 Comments

This transformerless solid-state automatic night lamp operates without using bulky transformer, and automatically switches ON some LEDs during night, and switches them OFF during day. In this post I have explained how to make a transformerless automatic darkness activated LED lamp circuit, using a couple of transistors and capacitive based power supply, eliminating the use […]

Filed Under: Lamps and Lights Tagged With: Automatic, Lamp, Night, Transformerless

Simple 4 Watt LED Driver Circuit Using IC 338

Last Updated on January 3, 2024 by Swagatam 23 Comments

4 watt led driver circuit

This 4 watt LED driver is a device that will illuminate a 4 watt LED safely through a constant current circuit using the IC LM338. The IC LM338 as we know is a highly versatile device when it comes to controlling voltages and current levels. Circuit Configuration In the present design, the device is configured […]

Filed Under: Lamps and Lights Tagged With: 338, Driver, LED, Simple, Watt

10 LED Simple Roulette Wheel Circuit Diagram

Last Updated on January 17, 2025 by Swagatam 20 Comments

10ledelectronicroulettewheelschematics252Cimage

A very simple 10 LED roulette wheel circuit is shown here. pressing the button starts the LEDs in a rotational motion (sequencing) at full swing initially, and gradually slows down, until it stops to a particular, randomly selected LED. The randomness of the selection depends upon the time for which the push remains switched ON […]

Filed Under: Games and Sports Projects Tagged With: LED, Roulette, Simple, Wheel

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