[sdiy] MIDI cable impedance and MIDI In ESD protection?

[Ben Stuyts]

On 26 Jun 2024, at 15:51, Roman Sowa via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> Maybe better to use TVS across the LED and another one, say 300V or more, from there to GND, as it was already suggested by Ben. Their capacitance in nowhere near our concern here.

You’re quite right. I didn’t do the math before. Midi current loop is 5 mA, so charging a 4n7 cap to 2 V for the optocoupler takes about 2 us. 1 midi bit is about 32 us, so should indeed be no problem.

Ben