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Newly Updated Circuit Projects:

Simplest Piezo Driver Circuit Explained

Last Updated on May 15, 2026 by Swagatam 47 Comments

piezodrivercircuit1

In the previous post I explained a piezo transducer element and learned how to use it with electronic circuits. In this article we will see how a piezo tranducer can be driven or operated using a simple circuit. As discussed earlier a piezo transducer basically requires a frequency to vibrate and reproduce the required sound. […]

Filed Under: Audio and Amplifier Projects Tagged With: Driver, Explained, Piezo, Simplest

Understanding and Using a Piezo Transducer

Last Updated on May 20, 2026 by Swagatam 11 Comments

piezotransducerelement

In this post we try to investigate what transducers are and how they need to be configured in circuits while using them in a given application Understanding Piezo Transducers A piezo transducer is a device primarily used for converting an applied frequency to audible sound. It may be compared to a loud speaker, the only […]

Filed Under: Electronics Theory Tagged With: Piezo, Transducer, Understanding

Single IC Piezo Driver Circuit – LED Warning Indicator

Last Updated on December 31, 2018 by Swagatam Leave a Comment

PiezodriverLEDdrivercircuit

The single IC piezo driver with LED explained here can be used as a warning indicator device in conjunction with some sensor for generating an audible as well as a visual indication. How the Circuit Functions The circuit of this piezo cum LED driver, warning indicator circuit utilizes just a single chip RE46C101 from microchip, […]

Filed Under: Sensors and Detectors Tagged With: Driver, Indicator, LED, Piezo, Single, Warning

Cell Phone Call Alert Security Circuit

Last Updated on May 16, 2026 by Swagatam 21 Comments

carsecuritycallbackcircuit

This circuit will give call back alerts in the form of blank calls on your cell phone whenever it senses a break in or intrusion inside the particular restricted area where it has been installed for the intended security monitoring. Introduction The cell phone call alert security system circuit which needs to be installed incorporates […]

Filed Under: Automobile Electronics Tagged With: Alert, Call, Cell, Phone, Security

Simple Water Level Indicator Circuits (with Images)

Last Updated on June 1, 2026 by Swagatam 99 Comments

IC 4049 pinout diagram

A water level indicator is an electronic circuit which indicates the various levels of water inside a tank. This happens when rising or dropping water levels come in contact with the respective water sensors arranged step wise inside the water tank at different depths. In this post I have explained 2 interesting ways to make […]

Filed Under: Indicator Circuits, Water Controller Tagged With: Circuits, Images, Indicator, Level, Simple, Water

Make This Powerful 200+200 watts Car Stereo Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 42 Comments

200wattcarstereoamplifiercircuit

No complex wiring, no costly MOSFETS and no cumbersome heatsinks, yet a powerful 200+200 watt stereo amplifier circuit, which can be built within hours using just a couple ICs, right in your home. Yes we are discussing the state-of-the-art thick film hybrid IC STK4050II, by SANYO.The IC is specifically designed for amplifying music at an […]

Filed Under: Audio and Amplifier Projects Tagged With: 200, Amplifier, Powerful, Stereo, watts

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