Programmable 8-character LCD module and digital voltmeter

Signal and power from the same voltage source

Most hobby electronics store carry cheap and ready to use digital voltmeter modules (DVM) the problem with those is that they do usually require an independent power source to power the DVM-module. Many circuits are made such that you have one power supply and you would like to power your circuit and the voltmeter module from this one single power supply.

This is exactly how you can use our 8-character LCD module and it saves you a lot of headaches on the power supply side. The module can either be powered with exactly 5V DC (without the voltage regulator installed) or it can be powered with a DC voltage of 6.5V or more.

Programmable 8-character LCD module and digital voltmeter

A display that works in the dark and in full sun light

We have used an LCD display that has back lighting but is at the same time able to take advantage of any surrounding light sources. In other words you get a module that works well in the dark and in full sun light. The readability is very good.

Space for your own sensor and components

This module is not just a display. It has as well a dot-matrix area where your can add your own components.

How can I program this 8 character display module?

The system has an atmega328p (or atmega328) chip and you can basically program it in any way you like and make it do anything that a microcontroller can do: Time events, read digital or analog signals, output digital signals, interact with the users.

The display is 8 characters long and fully alphanumeric. You can display letters, punctuation and numbers.

The possibilities are almost endless you just need to write the software for it. We provide some basic examples in the download section at the end of this article. You can take that code and use it to build your own application.

A configurable DVM module: flexible with no need to write any software

You can write your own software for this module but it is optional. It comes with software loaded and this default software covers a wide range of applications.

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About The Author

Ibrar Ayyub

I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation, and engineering. I have a clear and simple writing style and am skilled in using infographics and diagrams. I am a great researcher and is able to present information in a well-organized and logical manner.

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