If you take a look at the MIDI DIN in schematics for Teensy devices, you'll see that a different optocoupler is recommended for Teensy 2 and Teensy 3.x.
About three years, that same page recommended the PC900 for both T2 and T3. Does anyone know why this has changed? Is there an issue running the PC900 (H11L1 in my case) at 3.3 volts?
About three years, that same page recommended the PC900 for both T2 and T3. Does anyone know why this has changed? Is there an issue running the PC900 (H11L1 in my case) at 3.3 volts?