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Newly Updated Circuit Projects:

Beacon Level Indicator Circuit for Combine Harvester Grain Tanks

Last Updated on June 8, 2026 by Swagatam 2 Comments

grainindi

In this post I have explained a beacon indicator circuit for combine harvester grain tanks. The idea was requested by Mr. John Bosch. Circuit Objectives and Requirements I would like to retrofit the rotating beacon grain tank level indicator system shown below,  to my older combine harvester. The particular part of the system I want […]

Filed Under: Lamps and Lights Tagged With: Beacon, Combine, Grain, Harvester, Indicator, Level

Corona Effect Generator Circuit

Last Updated on June 1, 2026 by Swagatam 2 Comments

mon thumb1 2

In this post we study regarding what is corona effect and how to make a corona effect generator circuit at home using a CDI coil and a tesla coil configuration. Then idea was suggested by Mr. Sanjoy Corona Treatment for Paper Coating Many many thanks for posting the alternate switching timer circuit as requested. Although […]

Filed Under: Lamps and Lights Tagged With: Corona, Effect, Generator

Make this 7 Segment Digital Clock with Beep Alert Circuit

Last Updated on May 14, 2026 by Swagatam 58 Comments

P 20150830 153854

In this post I will show how to construct a digital clock using 7 segment LED display with Arduino controlled design. How the Circuits Works The proposed 7 segment clock circuit is inexpensive and even beginner in Arduino can accomplish it with ease. This clock consists of four 7 segment displays, two for hours and […]

Filed Under: Arduino Projects Tagged With: Alert, Beep, Clock, Digital, Segment

Battery Full Charge Indicator Circuit using Two Transistors

Last Updated on May 17, 2026 by Swagatam 104 Comments

Highbatteryindicatorcircuit

This little circuit will alert the user regarding a battery reaching its full-charge level (over charge) while it’s being charged, by illuminating an LED. The circuit uses just a couple of transistors as the main active components. Main Feature The main feature of this design is not only its mini design but also its supply […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charge, Full, Indicator, Transistors

Simple Faraday Flashlight – Circuit Diagram and Working

Last Updated on June 8, 2026 by Swagatam 14 Comments

torchdia

In this article I will show how to construct a Faraday flashlight circuit using only a coil/magnet assembly which requires no battery. It’s not radiant energy, but it converts oscillatory motion to electricity, which can power the flashlight for a couple of minutes. This flashlight will be useful in emergency situations where no access to […]

Filed Under: Lamps and Lights Tagged With: Faraday, Flashlight, Simple, Working

Simple Tea Coffee Vending Machine Circuit

Last Updated on May 16, 2026 by Swagatam 17 Comments

coinslot

A simple tea, coffee vending machine circuit idea is explained here which allows a customer to access the beverage with a press of a button and by inserting a genuine 5 rupee coin. The idea was requested by Mr. Ramesh. Circuit Objective and Requirement I need the water puling mechanism like coffee vending machine if […]

Filed Under: Automation Projects Tagged With: Coffee, Machine, Simple, Vending

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