This hack takes advantage of all of these aspects to bring you an Arduino controlled CGA monitor. One problem with experimenting with one of these monitors is that they are not that well documented.

including the latest Arduino Nano Every model. The I2C protocol only requires two wires to connect external devices. One wire (called serial data or SDA) is responsible for transferring data ...

One of the Datalink’s main innovations was its ability to download information from your PC — either through flashing images on a CRT monitor ... Arduino. It works the same way as Timex’s ...