Variable Range LED Voltmeter

This project is a Variable Range LED voltmeter. Description This is a variable range LED bar graph voltmeter project. It is a simple and less expensive project that displays voltage of a given source with the help of 10 LED’s. The project is based on the famous LM3914 IC from Texas instruments. Working The project is used as a Variable Range LED Voltmeter. The LED’s indicate the range of the input voltage a ...

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How To Make a Simple Variable Frequency Generator Using Arduino

A frequency generator is a very handy device in electronic design, development, testing and trouble shooting. It is such a kind of device which can generate the required frequencies which can be then applied directly to the target device for testing it. There are frequency generators which can generate the required waveform like sine wave, saw tooth wave etc. but for normal applications the square wave gene ...

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