reboot Posted May 30, 2008 Report Posted May 30, 2008 helloi want to ad a midi thru to my 6582....so let's for a part of ltc but i need just the minimal parts ....if i understand i keep ic3+j4 and j1...do i have to keep ic2 ? thank you Quote
Pascal Posted May 30, 2008 Report Posted May 30, 2008 You need only a 74LS14, 2 x 220 Ohm Resistors. Thats it ;-) Look Attachementmidi-thru-1.pdfmidi-thru-1.pdf Quote
Wilba Posted June 2, 2008 Report Posted June 2, 2008 I once bypassed the two NOT gates... i.e. connected the output of the optocoupler directly to the 220 Ohm resistor of the MIDI Thru jack. It worked... I did loopback tests with a PC via this MIDI Thru port and didn't get any errors. My theory was, if the optocoupler output could drive the PIC's Rx pin (which doesn't actually draw much current at all) then it could probably drive another optocoupler at the other end of a cable attached to a MIDI Thru port.It works, but the buffers are a better idea and the right way to do it. Quote
reboot Posted June 2, 2008 Author Report Posted June 2, 2008 thank you Pascal and Wilba i will experiment next week... Quote
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