This library is the result of reverse-engineering the communication protocol of a Chinese USB 125Khz RFID Reader/Writer. A detailed document describing the whole procedure can be found at the wiki ...

In the summer of 2017, I bought a Huion Kamvas GT-191. It's a device that combines a stylus digitizer tablet with a full HD display. The idea is that you use the stylus to draw right on the screen.

There was a time when instruments sporting a GPIB connector (General Purpose Interface Bus) for computer control on their back panels were expensive and exotic devices, unlikely to be found on the ...