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Newly Updated Circuit Projects:

Sleeping Aid Circuit

Last Updated on May 24, 2026 by Swagatam 12 Comments

sleeping aid circuit

The sleep aid circuit appears to be particularly effective when used with young children experiencing restless nights. This can, in turn, contribute to the entire household enjoying uninterrupted sleep. With the sleep aid device operating next to you, you can customize the volume and depth settings according to your mood. Then, recline and focus your […]

Filed Under: Health related Projects Tagged With: Sleeping

Transcranial Random Noise Stimulation (tRNS) Circuit

Last Updated on May 24, 2026 by Swagatam 8 Comments

TRNS transcranial random noise stimulator circuit

In this post I have explained a basic Transcranial random noise stimulation (tRNS) circuit diagram which can be implemented externally for stimulating brain cells, resulting in an enhanced performance of the brain. The design was requested by an avid reader of this blog “Ankita”, as given below. Design Request I’m interested in building a tRNS […]

Filed Under: Health related Projects Tagged With: Noise, Random, Stimulation, Transcranial, tRNS

Car Tank Water Sensor Circuit

Last Updated on May 22, 2026 by Swagatam 36 Comments

car2Btank

In this article I have explained a simple car tank water sensor alarm circuit using IC 555 and a pulsating signal on the sensing probes to pevent corrosion on the probes. The idea was requested by Mr. Peter. Circuit Objectives and Requirements The Design Referring to the figure below, the proposed car tank water sensor […]

Filed Under: Automobile Electronics, Water Controller Tagged With: Sensor, Tank, Water

Single Phase Voltage from Three Phase Voltage Source

Last Updated on May 21, 2026 by Swagatam 52 Comments

single phase from three phase

In this post I have explained a simple relay changeover circuit for extracting single phase AC from a three phase AC source irrespective of the condition whether all the three phases are present or not. The circuit was requested by Mr. Biannz. Technical Specifications hi sir please i need something I’ve been searching everywhere but not avail […]

Filed Under: Grid and 3-Phase Tagged With: Phase, Single, Source, Three, Voltage

2 Simple Automatic Transfer Switch (ATS) Circuits

Last Updated on May 21, 2026 by Swagatam 107 Comments

automatictransferswitchcircuit

In this article we investigate an ATS circuit for initiating an automatic changeover from mains supply to generator supply through many intermediate transfer stages which involves activating the fuel valve, choke valve and the generator starter. The circuit was requested by Mr. Hari, and another dedicated reader from this blog. Requirement for 5kva LPG Generator […]

Filed Under: Grid and 3-Phase Tagged With: ATS, Automatic, Circuits, Simple, Switch, Transfer

Simple 3 Phase Inverter Circuit

Last Updated on May 21, 2026 by Swagatam 259 Comments

3 phase driver signal 1

In this post I have explained how to make a 3 phase inverter circuit which can be used in conjunction with any ordinary single phase square wave inverter circuit. The circuit was requested by one of the interested readers of this blog. UPDATE: Looking for an Arduino based design? You may find this one useful: Arduino 3 […]

Filed Under: Grid and 3-Phase, Inverter Circuits Tagged With: Inverter, Phase, Simple

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