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Archives for 2012

Adding a Soft Start to Water Pump Motors – Reducing Relay Burning Problems

Last Updated on April 30, 2026 by Swagatam 140 Comments

In this post I have explained a few innovating and simple soft start circuit examples which may be implemented with heavy duty motors so that they are able to initiate with a soft start or a slow sluggish start instead of a sudden, bumpy start Why Soft Start is Crucial for Heavy Motors When heavy […]

Filed Under: Water Controller Tagged With: Adding, Motors, Pump, Soft, Start, Water

9 Simple Solar Battery Charger Circuits

Last Updated on March 31, 2026 by Swagatam 540 Comments

garden2Blight

Simple solar charger circuits are small devices which allow you to charge a battery quickly and cheaply, through solar panels. A simple solar charger circuit must have 3 basic features built-in: In this post I will comprehensively explain nine best yet simple solar battery charger circuits using the IC LM338, transistors, MOSFET, buck converter, etc […]

Filed Under: Solar Controller Circuits Tagged With: Battery, Charger, Circuits, Simple, Solar

Make This 1KVA (1000 watts) Pure Sine Wave Inverter Circuit

Last Updated on March 8, 2026 by Swagatam 294 Comments

A relatively simple 1000 watt pure sine wave inverter circuit is explained here using a signal amplifier and  a power transformer. As can be seen in the first diagram below, the configuration is a simple mosfet based designed for amplifying current at +/-60 volts such that the connected transformer corresponds to generate the required 1kva […]

Filed Under: Inverter Circuits Tagged With: 1000, 1KVA, Pure, Sine, watts, Wave

How to Generate Electricity from Sea Waves – 2 Simple Methods

Last Updated on January 21, 2026 by Swagatam 4 Comments

seawaterelectricity

In this post we investigate a couple of quick and efficient methods of generating free electricity from the sea waves which is limitless and an infinite source of energy. Introduction Just like wind and sun, sea is another example of massiveness and a potential raw energy source that may be harnessed for acquiring electrical power. […]

Filed Under: Renewable Energy Tagged With: Electricity, Generate, Methods, Simple, Water

How to Build a Pyro-ignition Circuit – Electronic Pyro Igniter system

Last Updated on September 20, 2025 by Swagatam 7 Comments

pyroignition 2

The following conversation was made by Mr.Tom and me regarding the circuit idea of a pyro-iginition system. I was asked to design the particular circuit idea by Mr.Tom in Fiverr.com. Technical Specifications The discussion explains the details of his requirement and how it was almost fulfilled by me Hi Swagatam, I was wondering if you […]

Filed Under: Temperature Controllers Tagged With: Build, Electronic, Igniter, Ignition, Pyro, System

How to Make a 220V to 110V Converter Circuit

Last Updated on July 5, 2025 by Swagatam 69 Comments

220v AC to 110v DC converter circuit diagram

In this post we will unravel a few homemade crude 220V to 110V converter circuits options which will enable to user the user use it for operating small gadgets with a different voltage specs. UPDATE: An SMPS circuit is the recommended option for building this converter, so for an SMPS 220V to 110V converter design […]

Filed Under: SMPS and Converters Tagged With: 110V, 220V, Converter

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