Yeah, exactly like this. Will try it tonight. Opto (I used EL357N SMD) is fast enough, raise/fall times are 3 microseconds, compared to 3.3 millisecond impulse by 300 baud.
Yeah, exactly like this. Will try it tonight. Opto (I used EL357N SMD) is fast enough, raise/fall times are 3 microseconds, compared to 3.3 millisecond impulse by 300 baud.