I have a core and 2 DOUT modules to midify a band organ. When the core is powered up midi note 45 is always on ( LED shows 1|note C_2 Oo) With no midi input connected to the core the note is on, if I connect my midi file player and play a tune it will play all notes just fine BUT midi 45 will always be on. Any suggestions please? I'm stumped.
note always on!
Started by
maxx11
, Jan 10 2012 18:29
3 replies to this topic
#2
gomiboy99
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Posted 10 January 2012 - 20:10
I assume that the DOUT is connected to the organ so as to operate that key on the organ, in which case check the wiring. You could supply the DOUT with +5V and 0V without the core connected, this would help narrow down where the fault lies.
#3
sparx
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Posted 10 January 2012 - 23:03
What happens if you swap the 2 DOUT's around?
#4
maxx11
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Posted 11 January 2012 - 22:59
looks like it might be a bad uln2803, new ones on order
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