Month: February 2020

I'm about to start wiring USB socket to experiment MIDI USB. But first, I wonder where I should connect the connector shield to. Should I connect the case to GND or should I do otherwise? I found a good thread in Electrical Engineering Stack Exchange. tl;dr: Never connect to GND. Leave it unconnected or connect to the shield of the rig. I should take the former in my current project. Although it's long, this thread is pretty interesting so is worth reading.

DR-110 that I am modifying currently takes 6V power supply from 4 AA batteries or 9V from an AC adapter. But since I'm thinking of connecting to USB, it's convenient if we can draw power from it. From the device circuit diagram, I found the device requires at least 6V supply although USB supply power is 5V. It's a good opportunity to learn how to use DC-DC booster since more project that uses USB will come. I live near Jameco. It's the best to use one they carry. It's even better if the package is DIP since I often use breadboards. I checked their catalog and found a switching regulator…