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New Circuit Projects

4 Automatic Day Night Switch Circuits Explained

Last Updated on October 20, 2022 by Swagatam 104 Comments

automatic20street20light20system

The 4 simple light activated day night switch circuits explained here can all be used for controlling a load, normally a 220V lamp, in response to the varying levels of the surrounding ambient light. The circuit can be used as a commercial automatic street light control system, as a domestic porch light or corridor light […]

Filed Under: Sensors and Detectors Tagged With: Automatic, Circuits, Explained, Night, Switch

Hi-Fi 100 Watt Amplifier Circuit Using 2N3055 Transistors – Mini Crescendo

Last Updated on December 22, 2023 by Swagatam 205 Comments

powe supply

Video Demonstration of the Crescendo Amplifier The mini crescendo 100 watt transistorized amplifier circuit explained here was built and tested by me and am extremely pleased by its performance and also its ruggedness as far as maintenance and handling is concerned. Amplifier Class Basically, the entire configuration is a symmetrical class A amplifier incorporating an […]

Filed Under: Audio and Amplifier Projects Tagged With: 100, 2N3055, Amplifier, Mini, Transistors, Watt

3 Glittering LED Christmas Tree Light Circuits Explored

Last Updated on January 20, 2025 by Swagatam 34 Comments

Flasher4060 1 compressed

In this post we present 3 circuit ideas for creating beautiful Christmas tree light decorations. The first idea explains a transistorized flashing blinking LED string light which can be mounted on a Christmas tree. The second circuit diagram describes an LED light effect generator which can be also installed over a real Christmas tree for […]

Filed Under: Mini Projects Tagged With: Christmas, Circuits, Glittering, LED, Light, Tree

Simple Timer Circuit Using IC 4060

Last Updated on January 2, 2024 by Swagatam 122 Comments

simple4060timercircuit

In this post I have explained how to build a simple yet accurate timer circuit using the IC 4060 and some ordinary passive components. Main Advantage of using IC 4060 as the Timer IC I have already discussed this IC comprehensively in one of my previous articles, everything regarding its pin outs have been discussed […]

Filed Under: Timer and Delay Relay Tagged With: 4060, Simple, Timer

Adjustable Timer Circuit Using IC 555

Last Updated on June 25, 2022 by Swagatam 163 Comments

SimpleTimer

IC 555 adjustable timer explained here can be adjusted from any time delay 1 second to 3 hours for operating any load through a relay control The produced time delay is fully adjustable and the user has the freedom to set the time period as desired. There are many ways of making simple timer circuits […]

Filed Under: Timer and Delay Relay Tagged With: 555, Adjustable, Timer

Simple Mobile Phone Detector Circuit [Tested]

Last Updated on December 13, 2024 by Swagatam 162 Comments

RFsensor

A cellphone or mobile phone detector is actually a high gain op amp amplifier which detects slightest of RF disturbance from a mobile phone, and illuminates an LED. Mobile phones today being the major generator of RF interference is easily picked up by this circuit and can be seen through an LED illumination at the […]

Filed Under: Sensors and Detectors Tagged With: Detector, Mobile, Phone, Simple, Tested

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