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Newly Updated Circuit Projects:

Parallel MOSFET Calculator Tool: How to Connect MOSFETs in Parallel Safely

Last Updated on June 1, 2026 by Swagatam 2 Comments

upgrade inverter power by adding mosfets in parallel

The following calculator tool can be used to correctly calculate all the parameters essential for connecting many number of MOSFETs in parallel. This ensures the current handling by the MOSFETs is implemented optimally, without any issues or technical errors, and keeps the MOSFETs safe for long term operations. MOSFET Parallel Calculator Total Load Current (Amps) […]

Filed Under: Inverter Circuits, Voltage Control and Protection Tagged With: Calculator, Connect, MOSFET, MOSFETs, Parallel, Tool

Laptop Charger Circuit from 12V Battery

Last Updated on May 30, 2026 by Swagatam 142 Comments

In this post I have explained a simple car laptop charger circuit for charging laptops from a 12V car battery using a IC 555 based boost converter. The idea was requested by one of the avid readers of this blog. Making a 12V to 19V Converter May I request you for a circuit diagram for […]

Filed Under: Battery Charger Circuits Tagged With: 12V, Battery, Charger, Laptop

5 Simple Audio Mixer Circuits Explained

Last Updated on May 28, 2026 by Swagatam 47 Comments

cartridge

The explained 5 circuits below are universal simple audio mixer circuits, that may be customized and upgraded to 5 channel or even 10 channel mixers, as desired by the user. Contributed by: Anil Rao. Stereo Audio Mixer The operation stereo audio mixer circuit shown below is straightforward: If a mic is “being used,” its output […]

Filed Under: Audio and Amplifier Projects Tagged With: Audio, Circuits, Explained, Mixer, Simple

Freezerless Refrigerator Circuit Diagram Explained

Last Updated on May 28, 2026 by Swagatam 4 Comments

single door refrigerator circuit

Existing frost free double door refrigerators function with the help of defrost timer and defrost heater for automatic defrosting. The objective of my circuit is to convert the existing refrigerator to one, without freezer (freezerless) Written and Submitted By: Subramanian. C.N. My circuit modifies the existing circuit of my refrigerator, by replacing the existing defrost […]

Filed Under: Home Electrical Circuits Tagged With: Explained, Freezerless, Refrigerator

How to Build a Simple Cloth Dryer for Rainy Season

Last Updated on May 28, 2026 by Swagatam 12 Comments

cloth1

In this post I have explained a simple homemade electric cloth dryer circuit using iron heater coil assembly which can be used for drying clothes at home during rainy season or overcast conditions. The idea was requested by Mr. Nelson. Circuit Objectives and Requirements I have read through some of the topics explained at your […]

Filed Under: Home Electrical Circuits Tagged With: Build, Cloth, Dryer, Rainy, Season, Simple

Home EMF Radiation Protector Neutralizer Circuit

Last Updated on May 28, 2026 by Swagatam 43 Comments

EMFradiationneutrilizercircuit

The post investigates a circuit which can be used for negating or neutralizing the everlasting harmful low frequency EMFs created from our mains power line in our homes. The idea was requested by one of the interested readers of this blog. Technical Specifications I’m trying to find a device or plans to build a device […]

Filed Under: Home Electrical Circuits Tagged With: EMF, Home, Neutralizer, Protector, Radiation

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