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Newly Updated Circuit Projects:

What’s Inside a Bluetooth Headset

Last Updated on August 6, 2018 by Swagatam 5 Comments

Bluetooth headset

In this post I have explained what’s inside a Bluetooth headset gadget and also know how to hack it for using it for other useful personalized applications. The world is going digital at a rapid pace and advanced concepts such as Bluetooth are quickly replacing the other traditional form of technologies. What’s Bluetooth What’s Bluetooth? […]

Filed Under: Wireless Circuits Tagged With: Bluetooth, Headset, Inside

5kva Ferrite Core Inverter Circuit – Full Working Diagram with Calculation Details

Last Updated on August 25, 2020 by Swagatam 468 Comments

5kva inverter circuit

In this post I have explained the construction of a 5000 watt inverter circuit which incorporates a ferrite core transformer and therefore is hugely compact than the conventional iron core counterparts. Block Diagram Please note you can convert this ferrite core inverter to any desired wattage, right from 100 watt to 5 kva or as […]

Filed Under: Inverter Circuits Tagged With: 5kva, Core, Ferrite, Full, Inverter, Working

Playing a Melody Using Arduino

Last Updated on May 15, 2026 by Swagatam 2 Comments

speaker schem

In this Arduino tutorial we will learn how to execute the tone() command for producing musical notes. The configuration will play a tiny musical tone that could be familiar to you.     Required Hardware for the Project Arduino BoardLoud speaker – 8 Ohm 1 inchResistor – 100 ohmsHook-up wires Procedure: It’s rather too straightforward […]

Filed Under: Arduino Projects, Audio and Amplifier Projects Tagged With: Arduino, function, Melody, Playing, Tone

Making a Wireless Doorbell Circuit

Last Updated on January 4, 2020 by Swagatam 27 Comments

wireless doorbell transmitter circuit

Today the traditional wired type of doorbells are gradually getting obsolete and are being replaced by the advanced wireless type of doorbells that are easier to install due to their hassle free set-ups. A simple wireless doorbell circuit is discussed in the following post which can be constructed at home. Written and Submitted By: Mantra […]

Filed Under: Wireless Circuits Tagged With: Doorbell, Making, Wireless

Adjustable 0-100V 50 Amp SMPS Circuit

Last Updated on February 12, 2025 by Swagatam 153 Comments

adjustable smps circuit

The high power adjustable switching power supply is perfect for the purpose of laboratory work. The topology used to design the system is switching topology – half controlled bridge. Written and Submitted by: Dhrubajyoti Biswas Warning: The following circuit design works with a direct 220 V Mains AC without any isolation at the input side, […]

Filed Under: Power Supply Circuits Tagged With: 100V, Adjustable, SMPS

Simple Water Heater Alarm Circuit

Last Updated on January 2, 2024 by Swagatam 1 Comment

buzzer with timer circuit

In this post I have explained a simple water heater alarm circuit which may be used as a safety device for getting indications regarding the switched position of a water heater or a geyser through intermittent buzzer actuation. The idea was requested by Mr. Mathew. Technical Specifications To be frank i am new to your […]

Filed Under: Security and Alarm Tagged With: Alarm, Heater, Simple, Water

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