Hi,
i have some question on MIDI test, I have a midi out from keyboard, i would like to connect it to a MIDI synthethiser and go to the Amp and speakers.
Please correct me if i m wrong and give me some input.
1, i would like to know the MIDI out pin config, pin 1,3 are NC, pin 2 is GND, pin4 current source, pin5 current sink, are they correct?
2, wat kind of output waveform do i expect? i tested on a LED, when the key is pressed the LED blink once but the light is very dim. do i getting the correct signal?the signal seem to be quite low.
3, i was trying to use a 4N32 opto coupler to isolate the signal, but failed, did not receive any signal at the output, the output is going to my MIDI synth, i checked on internet, found that 6N138 time rise/fall is faster, i ordered it. stil waiting... just curious on...the output signal i can get?
FYI, i tested on a LED, the LED keep on, i should get a blink on the LED to the midi syth but i did not get the signal, so the speaker don have any sound output.
i am using the ATMEL, ATSAM2195 3.3V fixed supply circuit design provided on the datasheet as my MIDI synth.
Thanks for help...is my design has any problem? the speakers don work...