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> Is this OK? I've not used a o-c before. I want a positive going edge
> to trigger a CMOS logic one-shot (Schmitt trigger input). The o-c is a
> FOD817 if it matters. Thanks
That looks fine.
FOD817 has 50-150% current transfer ratio (
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)So, with 3mA in you can expect at-least 1.5mA out, with the output being 10K and 12V that means the output will be saturated, and thus sutable for driving CMOS logic.