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Simple Peak Detector Circuit to Detect and Hold Peak Voltage Levels

Last Updated on May 31, 2024 by Swagatam 9 Comments

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In this article I have explained about a peak detector circuit, its working principle and how to implement it in clap operated circuits for illuminating an LED in response to clap sounds. What is Peak Detector A peak detector is a circuit which holds maximum amplitude value of a signal. If a signal varies rapidly […]

Filed Under: Sensors and Detectors Tagged With: Detect, Detector, Hold, Peak, Simple, Voltage

Simple Soil Moisture Tester Circuit with a Single IC 741

Last Updated on January 4, 2024 by Swagatam 49 Comments

A very simple mud or soil moisture tester circuit can be built by using a single opamp and a few passive components, I have explained the details through the following article. Circuit Objective After water and sunlight the earth or the soil is the next most important natural gift that this planet has provided us […]

Filed Under: Sensors and Detectors Tagged With: 741, Moisture, Simple, Single, Soil, Tester

Simple Vertical Axis Wind Turbine Generator Circuit

Last Updated on December 24, 2021 by Swagatam 8 Comments

In this post I have explained a simple vertical axis wind turbine generator circuit using ready made high power generator dynamo and a vertical axis wind turbine mechanism. The idea was requested by Mr. Taibani. Circuit Objectives and Requirements Hope you’re doing well. Firstly thanks for all the great knowledge & information you have given […]

Filed Under: Solar Controller Circuits Tagged With: Axis, Generator, Simple, Turbine, Vertical, Wind

5 Simple Preamplifier Circuits Explained

Last Updated on May 15, 2026 by Swagatam 125 Comments

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As the name suggests a preamplifier circuit pre-amplifies a very small signal to some specified level that can be further amplified by an attached power amplifier circuit. It basically acts like a buffer stage between the input small signal source and a power amplifier. A preamplifier is used in applications where the input signal is […]

Filed Under: Audio and Amplifier Projects Tagged With: Circuits, Explained, Preamplifier, Simple

2 Simple Light to Frequency Converter Circuits for Transforming Light into Pulses

Last Updated on January 19, 2025 by Swagatam 9 Comments

In this article we are going to see what is a light to frequency converter circuit, how it works, how to use it in a project, and its specifications. No matter which category you belong to, professional, hobbyist, engineer or student, modular components always reduce half of our headache while designing circuits. They eliminate the […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Converter, Frequency, Light, Simple, Transforming

How to make simple a LI-FI (Light Fidelity) Circuit

Last Updated on June 1, 2026 by Swagatam 172 Comments

LI-FI is buzzing around the Internet since past few years; recently LI-FI is gained more popularity around the internet and developers. LI-FI stands for Light Fidelity which was coined by Harald Hass. Circuit Objective The objective of LI-FI is transfer data through visible light. Since the bandwidth of visible light is 10,000 times more than […]

Filed Under: Lamps and Lights Tagged With: FI, Fidelity, LI, Light, Simple

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