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Newly Updated Circuit Projects:

Modify Human Speech with this Digital Voice Changer Circuit

Last Updated on May 15, 2026 by Swagatam 24 Comments

voicechangercircuit

In this post I have explained a voice modulator circuit which will change or transform an individuals unique voice into a completely new form. The new voice will be different to the original voice tone and unrecognizable. The Circuit Concept The characteristic tone of  every individuals voice is specifically unique in all circumstances. How often […]

Filed Under: Audio and Amplifier Projects Tagged With: Changer, Digital, Human, Modify, Speech, Voice

Music Triggered Amplifier Speaker Circuit

Last Updated on May 15, 2026 by Swagatam 8 Comments

buzzercoil

The circuit idea I have explained below enables a power amplifier loudspeakers to switch ON only when there’s an input music available, otherwise it makes sure that the loudspeakers remain shut off. The idea ws requested by Mr. David Alda. Technical Specifications Your site is just awesome. I’m hoping you can post a tweak to […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Music, Speaker, Triggered

Selecting Power Supply for Car Amplifiers

Last Updated on May 15, 2026 by Swagatam 43 Comments

49060

The following discussion informs us regarding how to select the right power supply for a car amplifier which needs to be operated at home. The questions were raised by Mr. Gyaneshwar Singh. Questions and Answers Regarding Selecting Car Amplifier Correctly Question: Thanks for creating awareness on your own concept and resolving problems of others.I am music […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifiers, Power, Selecting, Supply

Making a Stethoscope Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 47 Comments

stethescopeamp

In this post I have explained how to make an electronic stethoscope amplifier circuit for enabling a loud audible reproduction of the heart beats which is being diagnosed. The article also reveals how the same can be applied within a cellphone through a wireless circuit. The idea was requested by Dr. Ankit. Main Requirements The […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Making, Stethoscope

How to Design High-Pass and Low-Pass Filter Circuits Quickly

Last Updated on May 15, 2026 by Swagatam 34 Comments

high2Bpass2Bgraph

In this post I have explained how to design audio filter circuits such as high pass filter and low pass filter circuits effortlessly without going through the hassles of complex simulation and calculations. The presented designs will enable creating filter circuits only for the desired specific frequency bands and block all other unwanted frequencies. What’s […]

Filed Under: Audio and Amplifier Projects Tagged With: Circuits, Design, Filter, High, Pass, Quickly

Music Power Level Indicator Circuit using IC LM3915

Last Updated on May 15, 2026 by Swagatam 9 Comments

level2Bmeter2Bcircuit

In this post I have explained a  LED music power level indicator for indicating a subwoofer bass power range, which can be also modified as an effective dancing Electroluminescent Wire light show. The idea was requested by Mr. David. Technical Specifications Here’s an idea or suggestion for your projects or what ever lol My son […]

Filed Under: Audio and Amplifier Projects Tagged With: Indicator, Level, LM3915, Music, Power

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