yngndrw
New Member
Hi,
I just wanted to check that this configuration is incorrect. It is part of a stepper motor driver which I bought and I've traced the problem back to this. It seems that the opto-isolator's output is the wrong way around but I thought it was best to double check if this makes any kind of sense.
https://yngndrw.hostilezone.net/uploads/Stepper Driver Fail.png
At point A, I measure a high level signal to be 5V and a low level signal to be 1.7V. This means that the schmitt inverter never outputs a high signal.
Thanks,
-Andrew.
I just wanted to check that this configuration is incorrect. It is part of a stepper motor driver which I bought and I've traced the problem back to this. It seems that the opto-isolator's output is the wrong way around but I thought it was best to double check if this makes any kind of sense.
https://yngndrw.hostilezone.net/uploads/Stepper Driver Fail.png
At point A, I measure a high level signal to be 5V and a low level signal to be 1.7V. This means that the schmitt inverter never outputs a high signal.
Thanks,
-Andrew.