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Bicycle Dynamo Battery Charger Circuit

Last Updated on September 1, 2023 by Swagatam 32 Comments

dynamobatterychargercircuit

In this post I have explained a simple constant current bicycle dynamo battery charger circuit which can be used for charging a Li-Ion or Ni-Cd battery from a bicycle dynamo electricity source. The idea was requested by Mr. Saif Khan. Technical Specifications I want to charge a battery through a dynamo fitted to a cycle. […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Bicycle, Charger, Dynamo

Pure Sine Wave Inverter Circuit Using IC 4047

Last Updated on December 11, 2024 by Swagatam 785 Comments

A very effective pure sine wave inverter circuit can be made using the IC 4047 and a couple IC 555 together with a few other passive components. I have explained the details below. The Circuit Concept In the previous post I explained the main specifications and datasheet of the IC 4047 where I have explained […]

Filed Under: Inverter Circuits Tagged With: 4047, Inverter, Pure, Sine, Wave

Electronic Load Controller (ELC) Circuit

Last Updated on January 8, 2024 by Swagatam 83 Comments

ELCvoltagemonitorcircuit

In this post I have explained a simple electronic load controller or governor circuit which automatically regulates and controls the rotational speed of a hydro-electric generator system by adding or deducting an array of dummy loads. The procedure ensures a stabilized voltage and frequency output for the user. The idea was requested by Mr. Aponso […]

Filed Under: Grid and 3-Phase Tagged With: Controller, ELC, Electronic, Load

Single Phase Variable Frequency Drive VFD Circuit

Last Updated on February 9, 2025 by Swagatam 314 Comments

In this post I have explained a single phase variable frequency drive circuit or a VFD circuit for controlling AC motor sped without affecting their operational specifications. What is a VFD Motors and other similar inductive loads specifically do not “like” operating with frequencies that might be not within their manufacturing specs, and tend to […]

Filed Under: Motor Controller Tagged With: Drive, Frequency, Phase, Single, Variable, VFD

3-Phase Signal Generator Circuit using Opamp

Last Updated on January 8, 2024 by Swagatam 116 Comments

Screenshot2014 11 2200.58.38

Many a times we find it crucial and handy to possess a true three phase signal for evaluating many different electronic configurations such three phase inverters, three phase motors, converters etc. Since it’s not so easy to incorporate single phase to three phase conversion quickly we find this particular implementation difficult to acquire and enforce. […]

Filed Under: Oscillator Circuits Tagged With: Generator, Opamp, Phase, Signal

Making a Parasite Zapper Circuit

Last Updated on January 2, 2024 by Swagatam 4 Comments

An interesting electronic parasite zapper circuit shown below was successfully built and tested by my friend Mr. Steven. I have explained more about the proposed circuit. The Circuit Idea Email received from Mr. Steven:”Hey swagatam did you see the latest pictures I put in my SkyDrive, 4060 integrated circuit type parasite zappers built before but […]

Filed Under: Pets and Pests Tagged With: Making, Parasite, Zapper

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