Re: Optocoupler question: Why is my rise time so high?



Is this thehttp://en.wikipedia.org/wiki/Breadboardtype breadboard ??

With so few pins, you could solder wires to the opto pins and check if
its the breadboard causing your problems, which I suspect it is.

Yes, it's a similar style breadboard.

I actually put this breadboard circuit together after I integrated the
optocouplers into my circuit, using solder and a protoboard. I
observed the problem first on a soldered circuit, and then again in
the breadboard circuit.

I have a big pile of 4.7K resistors lying around, and I thought,
"Well, if they're good enough for I2C pullups..."

.

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