AW: AW: [sdiy] 3.3V and MIDI

[Ullrich Peter]

Hi!

	>Handwaving solution, for 3v3 wee need 320 ohms in circuit for 5mA
(allow
	>1v7 for photodiode)
	> 
	>> Remember that the receiver also has a 220 ohm resistor on teh input.
	> 
	>So need 100 ohms in the sender.  Should be ok.
	
	And as both MIDI pins at the sender (Midi out) have resistors you should
take half of this value in each path: 2x 50 ohms (so normally you will take the
standard 47 ohms).

	The MIDI-In circuit of course can be the same as usual as the
voltage/current for this current loop comes from another gadget (that might work
with 5V).

	Ciao
	Peter

	http://ullrich.at.tt