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New Circuit Projects

Electronic Scoreboard Circuit Using IC 4033 Counter

Last Updated on January 3, 2024 by Swagatam 12 Comments

simple4033counterscoreboardcircuit

A simple multi-digit electronic score board system can be built using a basic 4033 IC counter circuit. The whole procedure is explained in the following article. So far we have learned quiet a lot about this interesting IC 4033 through the following posts that have comprehensively discussed the pinouts and cascading procedures of the chip. […]

Filed Under: Games and Sports Projects Tagged With: 4033, Counter, Electronic, Scoreboard

Treadmill Motor Speed Controller Circuit

Last Updated on January 3, 2025 by Swagatam 356 Comments

In this post I have explained a simple, accurate, high torque treadmill motor speed controller circuit which may be effectively installed in similar units for acquiring PWM controlled variable speed feature. The idea was requested by Mr. Samuel. Technical Specifications I’ve a treadmill whose power failed completely…it had been imported from china and it’s like […]

Filed Under: Motor Controller Tagged With: Controller, Motor, Speed, Treadmill

Operating Single Rice Bulb Lamp with 220V AC

Last Updated on June 20, 2019 by Swagatam 12 Comments

In this post I have explained a simple 220V mains operated transformerless single rice bulb power supply circuit, which may be used for illuminating electronic rice lamp diyas replacing traditional oil lamp type diyas during festivals or for decorating sacred idols. The idea was requested by Ms. Rashmi. Technical Specifications I want to make a rice […]

Filed Under: Power Supply Circuits Tagged With: 220V, Bulb, Lamp, Operating, Rice, Single

1 to 10 minutes Timer Circuit Diagram

Last Updated on January 17, 2025 by Swagatam 26 Comments

Simple Frequency Counter Circuit Diagram

The post narrates a simple yet highly accurate adjustable 1 to 10 minute timer circuit with display. The idea was requested by one of the dedicated readers of this blog. Technical Specifications I am trying to build a circuit to help me with giving speeches. I have a bunch of parts already and I would […]

Filed Under: Timer and Delay Relay Tagged With: Minutes, Timer

Control Two Submersible Pumps Alternately

Last Updated on June 20, 2019 by Swagatam 31 Comments

submersiblewaterpumpcontrollercircuit

In this post I have explained a simple water level controller circuit applicable for automatic toggling of two submersible water pumps alternately in response to a predetermined water level switching. The entire circuit is built using just a single IC and a few other passive parts. The idea was requested by one of the interested members of […]

Filed Under: Water Controller Tagged With: Alternately, Control, Pumps, Submersible

How to Cascade IC 4033 in Multiple Digit Counter Display

Last Updated on July 13, 2024 by Swagatam 9 Comments

cascadingIC4033circuit

In this article I will comprehensively explain how to cascade many 4033 ICs together for driving multiple 7 segment counter displays. In one of my previous articles I have uniquely explained the role of pin#3 and pin#4 which become crucial when the IC 4033 are intended to function for driving multiple displays. Multiple Digit Display […]

Filed Under: Electronics Theory Tagged With: 4033, Cascade, Counter, Digit, Display, Multiple

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