2020-09-14, 07:19 PM
(2020-08-10, 11:58 AM)?monos1 Wrote: I'm especially interested in checking the second circuit as it incorporates the resistance - although of a value of 10k, I don't know if it will work as it is - and the third connector for 3.3V+:
![[Image: HTB1nN64MVXXXXbQXXXXq6xXFXXXJ.jpg]](https://ae01.alicdn.com/kf/HTB1nN64MVXXXXbQXXXXq6xXFXXXJ/224361831/HTB1nN64MVXXXXbQXXXXq6xXFXXXJ.jpg)
(2020-08-12, 01:26 PM)monos1 Wrote: As MatsA commented, the input resistance is not sufficient and saturates the optocoupler emitter. I have to put a resistor in the Seatalk input to use the circuit I like. I used a 10k resistor. For the other circuit it is not necessary but the resistance at the output is not built in.
I like this board too. Did you add the 10k resistor to the seatalk side in series with the existing 470 resistor? Do you think replacing the 470 by the 10K in the board should work too?