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You are here: Home / Archives for LM3915 IC

Light Meter Circuit with LED Bar Graph

Last Updated on May 18, 2022 by Swagatam 6 Comments

In this post we will discuss 3 different light meter circuits for measuring power of light. In the first method we will use only a solar cell and a multimeter, […]

Filed Under: LM3915 IC, Meters and Testers

LED Oscilloscope Circuit

Last Updated on February 23, 2022 by Swagatam 6 Comments

The simple LED oscilloscope circuit explained in this article can be used for analyzing low frequency waveform through a 10 x 10 LED matrix display. Due to the involvement of […]



Filed Under: 4017 IC Circuits, DIY LED Projects, LM3915 IC, Meters and Testers

LM3915 IC Datasheet, Pinout, Application Circuits

Last Updated on February 8, 2022 by Swagatam 14 Comments

If you are having difficulty in understanding how to use an LM3915 IC, this article will help you to easily construct any desired applicable circuit using this IC. Here, we […]

Filed Under: Datasheets, Electronic Components, Electronics Tutorial, LM3915 IC

Alcohol Detector Meter Circuit using MQ-3 Sensor Module

Last Updated on August 3, 2019 by Swagatam 12 Comments

MQ-3 sensor LM393 comparator circuit

An alcohol detector is a sensitive device which is able to detect the presence of alcohol molecules or any similar volatile inflammable element in the air and convert it into […]

Filed Under: LM3915 IC, Meters and Testers, Mini Projects

Wireless Music Level Indicator Circuit

Last Updated on August 9, 2019 by Swagatam 27 Comments

music light effect

A wireless music level indicator is an electronic device built for sensing the varying levels of a music signal and convert it into corresponding levels of illumination over an LED […]

Filed Under: DIY LED Projects, LM3915 IC, Mini Projects

10 LED Tachometer Circuit

Last Updated on April 6, 2021 by Swagatam 65 Comments

The post explains how an accurate 10 LED tachometer circuit can be built using ordinary parts like IC 555 and IC LM3915. The idea was requested by Mr. Munsif. What […]

Filed Under: Car and Motorcycle, LM3915 IC

Simple Tea Coffee Vending Machine Circuit

Last Updated on March 2, 2020 by Swagatam 17 Comments

A simple tea, coffee vending machine circuit idea is explained here which allows a customer to access the beverage with a press of a button and by inserting a genuine […]

Filed Under: 555 IC Circuits, Industrial Electronics, LM3915 IC, Simple Circuits

Battery Backup Time Indicator Circuit

Last Updated on July 15, 2019 by Swagatam 2 Comments

The post explains a battery backup time indicator circuit for monitoring the battery power usage by the connected load and for estimating the approximate remaining backup time of the battery. […]

Filed Under: 324 IC Circuits, Battery Chargers, LM3915 IC

Speed Dependent Brake Light Circuit

Last Updated on July 15, 2019 by Swagatam 5 Comments

The post explains an innovative brake light circuit using speed detection of the vehicle which could be a motorcycle. The circuit implements an advanced brake light switch ON ensuring a […]

Filed Under: 555 IC Circuits, Car and Motorcycle, LM3915 IC

Push Button Fan Regulator Circuit with Display

Last Updated on July 15, 2019 by Swagatam 41 Comments

A very interesting push button operated fan regulator circuit with LED display is explained in the following article, which can be built and installed at home for the suggested purpose. […]

Filed Under: 555 IC Circuits, Home Electrical Circuits, LM3915 IC



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