I am planning on building a teensy 4.0 midi circuit, and have been looking at the info at https://www.pjrc.com/teensy/td_libs_MIDI.html.
However, i wanted to ask about the power supply. In the schematics, it looks like an external 5V source is required to be connected to Vin and pin 8 on the opto ic (apparently the 3.x and the 4.x versions share the same schematics):
What's confusing me is that - judging by the photos of the finished circuit - the power supply seems to come from the teensy alone.
I'm asking because - ideally - i'd like to build the circuit in a fashion that allows tapping power from the teensy alone. It would be nice to have the sole USB connection power everything.
Could someone please clarify? Thanks in advance!
However, i wanted to ask about the power supply. In the schematics, it looks like an external 5V source is required to be connected to Vin and pin 8 on the opto ic (apparently the 3.x and the 4.x versions share the same schematics):
What's confusing me is that - judging by the photos of the finished circuit - the power supply seems to come from the teensy alone.
I'm asking because - ideally - i'd like to build the circuit in a fashion that allows tapping power from the teensy alone. It would be nice to have the sole USB connection power everything.
Could someone please clarify? Thanks in advance!