To do so, the Arduino was set up to monitor the BUSY line on the printer’s parallel port, setting the CTS line active whenever the busy line was inactive. With our task made clear, hours of ...

This means (again, theoretically), it’s possible to update the firmware in your DIY MIDI synth over SysEx message, or a parallel port, maybe. Someone is going to upload to an Arduino board over ...

Especially in case of unavailability of the Arduino USB port connected to the PC ... We should use a cheap parallel shift-out registers (it costs, depending on the country, a variable price around ...