Glad you got it working. Played with a Shottky bridge in front of the opto for receive and needed to drop the opto's series R from 220R to 200R to compensate for forward drop.
With the bridge in...
Type: Posts; User: MatrixRat
Glad you got it working. Played with a Shottky bridge in front of the opto for receive and needed to drop the opto's series R from 220R to 200R to compensate for forward drop.
With the bridge in...
Looks good to me.
Ok, mockup completed. Along the way noted circuit post #12 shows R118 as 10K, should be 110R.
23288
Don't have any BAT54s so D21/22 are 1 Amp Shottky. R204 and Red Led serve as a visible...
Just adding, in hindsight should have mentioned in my first reply that 1/8" TRS Midi hardware is on the build bench and although I don't have gear with CV or Gate (yet), a colleague does so the...
MC74HC1GT04DFT2 has HC family input thresholds so probably won't work with +3.3v input signal. You need to look at 74HCTxxx family.
74HCT04 is a hex inverter and its outputs can source or sink...
How about using a 74HCTxxx for U5, U15 and U16 to buffer and level shift to 5v and power protection circuits with +5v?
Having said that, I think the forward drop of two BAT54s needs to be taken...