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Newly Updated Circuit Projects:

Wheel Rotation Detector Circuit

Last Updated on January 1, 2019 by Swagatam 7 Comments

wheel rotation detector circuit

In this post I have explained a simple wheel rotation identifier or detector circuit which can be used for ensuring a continuous rotating movement of a concerned wheel through an LED, photodiode arrangement. The circuit was requested by nzb109. Technical Specifications I want to generate a trigger circuit to detect that a WHEEL is stationary. […]

Filed Under: Sensors and Detectors Tagged With: Detector, Rotation, Wheel

Simplest Full Bridge Inverter Circuit

Last Updated on March 20, 2025 by Swagatam 398 Comments

Among the different existing inverter topologies, the full bridge or the H-bridge inverter topology is considered to be the most efficient and effective. Configuring a full bridge topology could involve too many criticality, however with the advent of full bridge driver ICs these have now become one of the simplest inverters one can build. What’s […]

Filed Under: Inverter Circuits Tagged With: Bridge, Full, Inverter, Simplest

Safety Buoy Switch Circuit for Human Powered Submarine

Last Updated on July 6, 2019 by Swagatam Leave a Comment

divers safety buoy switch circuit

In this post I have explained a safety mechanism circuit which can be used in human powered submarines for safeguarding the diver during emergency situations. The idea was requested by Mr. Marielle. Technical Specifications  For a (voluntary) project of the TU Delft in the Netherlands, we are building a human powered submarine. In this submarine we need a […]

Filed Under: Water Controller Tagged With: Buoy, Human, Powered, Safety, Submarine, Switch

Washing Machine Motor Agitator Timer Circuit

Last Updated on June 30, 2026 by Swagatam 59 Comments

washing machine agitator timer circuit

The article details a circuit design for controlling a washing machine motor agitator through a preset time sequence which also includes an alternate reversing of the motor rotation. The circuit was requested by Mr. E.Rama Murthy. Technical Specifications I am having old washing machine which is good working till now. Of late, its PCB has […]

Filed Under: Motor Controller Tagged With: Agitator, Machine, Motor, Timer, Washing

IC 4040 Datasheet, Pinout, Application

Last Updated on May 17, 2026 by Swagatam 5 Comments

4040 pinout diagram

The IC 4040 is technically a 12-stage binary ripple counter chip, in simple words a device which will produce a calculated delayed frequency output in response to every pulse applied at its clock input. This delay is incremented at the rate of 2n where n is the pinout order in the sequence of its outputs. […]

Filed Under: Datasheets and Components Tagged With: 4040, Application, Datasheet, Pinout

Using Aluminum Strip Heatsink for Hi-watt LEDs instead of PCB

Last Updated on June 1, 2026 by Swagatam 16 Comments

20131225 050828 2

Whenever we come across using 1 watt LEDs or other higher watt LEDs, we are always advised to use high grade aluminum based heatsinks for safeguarding the LEDs from heat, and for acquiring optimal performance from them. Double Side PCB can be Costly However as we all know such PCBs are highly costly and could […]

Filed Under: Lamps and Lights Tagged With: Aluminum, Heatsink, instead, LEDs, Strip, Watt

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