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New Circuit Projects

FM Wireless Microphone Circuit – Construction Details

Last Updated on November 8, 2023 by Swagatam 45 Comments

fm 2

A wireless microphone is a portable electronic microphone which allows the user to transmit its voice to an amplifier without any wire connection, hence the name wireless microphone. Making a wireless mic at home can be real fun, here I have explained one such simple project which can be used for recording and paying back […]

Filed Under: Transmitter Circuits Tagged With: Construction, Details, FM, Microphone, Wireless

How to Make a Bicycle Horn Circuit with Ringtone

Last Updated on November 8, 2023 by Swagatam 17 Comments

inductor

A bicycle horn is normally used in bicycles for generating an amplified alarm sound with a press of a button for alerting anybody getting on the path of the running bicycle. In this post I have explained the complete construction of an electronic bicycle horn circuit which will resemble a phone musical ringtone sound. Introduction […]

Filed Under: Automobile Electronics Tagged With: Bicycle, Horn, Ringtone

Sequential LED Array Light Circuit

Last Updated on November 8, 2023 by Swagatam 32 Comments

LEDbar

In this article I have explained how to make a sequential LED array light circuit with an sequentially illuminating LED forming a bar graph kind of LED formation. Introduction In this article I have explained a simple method of making an incremental LED light using the IC 4017, which is rather equipped with specifications not […]

Filed Under: Lamps and Lights Tagged With: Array, LED, Light, Sequential

3 Tested 220V High and Low Voltage Cut OFF Circuits Using IC LM324 and Transistors

Last Updated on January 19, 2024 by Swagatam 176 Comments

over2Bvoltage2Bprotector

An AC mains high/low cut-off device will cut off or disconnect the mains supply from home electrical whenever a high voltage or low voltage situation is detected. In this way it ensures total safety to the home wiring and appliances from fire hazards, due to abnormal over voltages, brown outs or low voltages. In this […]

Filed Under: Voltage Control and Protection Tagged With: 220V, Circuits, High, OFF, Tested, Voltage

220V Solid State Relay (SSR) Circuit using Triac and OptoCoupler

Last Updated on January 19, 2025 by Swagatam 40 Comments

ssr 3

An AC mains solid state relay or SSR is a device which is used for switching heavy AC loads at mains level, through isolated minimal DC voltage triggers, without incorporating mechanical moving contacts. In this post I have explained how to construct a simple mains operated solid state relay or an SSR circuit using a […]

Filed Under: Datasheets and Components Tagged With: 220V, Relay, Solid, SSR, State, Triac

12V LED String Light Flasher Circuit for Christmas Decoration

Last Updated on January 18, 2025 by Swagatam 14 Comments

flasher

Looking for a simple 12 V LED string light flasher circuit for your next Christmas decoration project? Learn how easy it is to build a LED wig wag string light flasher using just a couple of transistors and few other passive components. LED Flashing String Lights for Decorating Homes A LED flasher schematic has also […]

Filed Under: Mini Projects Tagged With: 12V, Christmas, Flasher, LED, Light, String

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