It would be hard to find any electronics still in production which use CRT displays, but for some inscrutable reason it’s ...

The Adapter Board RA7 is an open-source hardware Arduino shield with all relevant files shared in a hardware repository with Altium schematics and PCB layout, mechanical drawings, Bill of Materials, ...

4 and 19 pins are used to adjust the display contrast through a resistor. I use a 1 Mega Ohm variable resistor. Acceptable contrast ~270kOm.

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.