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Newly Updated Circuit Projects:

How to Build an Ozone Water/Air Sterilizer Circuit – Disinfecting Water with Ozone Power

Last Updated on May 28, 2026 by Swagatam 49 Comments

We are all familiar with thundering and lightning during stormy weathers and know how the effect is responsible of producing a lot of ozone and negative ions in the atmosphere. The same concept has been employed in the proposed water and air sterilizer circuit. Properties of Ozone Ozone is a pale blue gas having a […]

Filed Under: Home Electrical Circuits Tagged With: Build, Disinfecting, Ozone, Power, Sterilizer, Water

Automatic Evaporative Air Cooler Circuit

Last Updated on May 28, 2026 by Swagatam 10 Comments

automatic2Bcooler

In this post we study a simple moisture sensor circuit which enables an evaporative air cooler to automatically restore the wetness level of its evaporative pad by detecting its moisture level and by activating the water pump accordingly. The idea was requested by Mr. Ankur shrivastava Technical Specifications sir could you please help me to […]

Filed Under: Home Electrical Circuits Tagged With: Automatic, Cooler, Evaporative

Simple Home Automation Circuits

Last Updated on May 28, 2026 by Swagatam 2 Comments

frequency controlled door lock circuit

In this article I have explained a few useful yet easy to build home automation circuits which will help the user to create automatic electronic systems at home. What is Home Automation Home automation basically means converting many of the manually operated home electrical devices into automatically operated devices, through electronics. Today’s real home automation […]

Filed Under: Home Electrical Circuits Tagged With: Automation, Circuits, Home, Simple

2 Simple Washing Machine Circuits Explained

Last Updated on May 28, 2026 by Swagatam 9 Comments

simple2Bwashing2Bmachine

In this post I have explained how to make a couple of simple washing machines using a bidirectional single motor with timer and a simple version using cam shaft mechanism, cheaply. In the first design we use a bidirectional, alternately rotating clockwise and counter clockwise with a pause in the middle: Audio/Video Representation Circuit Working […]

Filed Under: Home Electrical Circuits, Motor Controller Tagged With: Machine, Simple, System, Washing

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

Last Updated on May 27, 2026 by Swagatam Leave a Comment

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

How to Upgrade EGS002 Inverter to 5kVA Level

Last Updated on May 26, 2026 by Swagatam Leave a Comment

In this article I will explain how to upgrade an EGS002 inverter board to 5kVA power level using the HCPL-3120 or HCPL-J312 opto isolated drivers with isolated inputs and isolated power supply stages. However, the low side MOSFETs are driven through ordinary BJT totem pole configuration such as by using BD139 and BD140 transistor pairs. […]

Filed Under: Inverter Circuits Tagged With: 5kva, EGS002, Inverter, Level, Upgrade

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