A programmable 8-character LCD module and digital voltmeter project from Tuxgraphics:
Our 3 digit LED digital voltmeter module has been quite successful over the years. This new LCD module is basically an advanced version with a lot more capabilities. You can power it with the same voltage source that your signal is derived from. You can load your own code into this module but it has even some nice features for people who just need a voltmeter module and don’t want to play with C-code.
Project info at Tuxgraphics.
Files and source code are available at tuxgraphics.org.