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Newly Updated Circuit Projects:

Maintenance Tips for Lead Acid Battery

Last Updated on July 18, 2019 by Swagatam 3 Comments

In this post I have explained some of the crucial parameters related to lead acid battery maintenance tips for ensuring longer life to the device. The questions were asked by Mr. Raja Gilse, answered by me. What is Full Charge Voltage of a 12V Battery Question: What is the full charge volt of the 12 […]

Filed Under: Inverter Circuits Tagged With: Acid, Battery, Lead, Maintenance, Tips

Electronic Load Controller (ELC) Circuit

Last Updated on May 21, 2026 by Swagatam 86 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

I/V Tracker Circuit for Solar MPPT Applications

Last Updated on July 15, 2019 by Swagatam 24 Comments

iv curve tracker circuit 1

Optimizing power by tracking is the key feature which makes solar MPPT concept so unique and efficient, where the complex and non-linear I/V curve of the solar panel is tracked and switched for creating maximum optimal conditions for the connected load. The Circuit Concept I have been trying hard to design something that would in […]

Filed Under: Solar Controller Circuits Tagged With: Applications, MPPT, Solar, Tracker

Single Phase Variable Frequency Drive VFD Circuit

Last Updated on June 30, 2026 by Swagatam 324 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

How to Protect MOSFETs – Basics Explained

Last Updated on May 20, 2026 by Swagatam 76 Comments

howtostopmosfetfromburning

In this post I will comprehensively explain how to protect mosfets and prevent mosfet burning in electronic circuits by following some basic guidelines related to correct PCB layout, and careful manual handling of these sensitive devices. Introduction Even after connecting everything correctly you find the mosfets in your circuit becoming HOT and blowing off within […]

Filed Under: Electronics Theory Tagged With: Basics, Explained, MOSFETs, Protect

Connecting Voltage Regulators 78XX in Parallel for High Current

Last Updated on November 24, 2022 by Swagatam 61 Comments

78XXinparallelforhighercurrent

In this post we investigate how to connect popular voltage regulator ICs such as 7812, 7805 in parallel for acquiring high current output from the ICs. Voltage regulator chips mostly have their maximum current output specs fixed to some predetermined levels. Increasing them to a higher level would normally call for external out board transistors […]

Filed Under: Power Supply Circuits Tagged With: 78XX, Connecting, High, Parallel, Regulators, Voltage

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