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TheKikGen / USBMidiKliK4x4

UMK4x4 - 4-16 in/out and 3-15 IN/3OUT USB MIDI interface for STM32F103 series board
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Bluepill board - Opto replacement 6N138 - 6N137 ? #3

Closed orzdk closed 5 years ago

orzdk commented 5 years ago

Hi, Can 6N138 be replaced with 6N137, by replacing R1, R3 and R7 with 10K ? Thank you, BR Jesper

orzdk commented 5 years ago

Let's close this, 38's should be here next week, so soon no issue : )

TheKikGen commented 5 years ago

38 are usuals for MIDI. Fully possible to use others opto....but you have to adapt the schematic. Better to stay close to the midi standard....