Read: 482 times
|#68293 - RE: CNY17-3 is the culprit!|
Responding to: Kai Klaas's previous message
Beside this, I think your optocoupler is responsible for the malfunction. My datasheet says: rise time 300Ásec, fall time 300Ásec!! So, for a full range swing you need 300Ásec plus 300Ásec, makes 600Ásec, which corresponds to a maximum frequency of 1.7kHz!!!
So, your observation at 3kHz is no surprise with this data.
To the best of my knowledge, CNY17-3 is not that slow. Which datasheet you are consulting?