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Author Topic: Listening to 12V Signals with Optocouplers?  (Read 1352 times)
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Cumming, GA
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I was referring to COMMON VENDOR pricing for roughly a worst case scenario (besides Radio Shack)... but my point is  resistors are  only pennies.  Personally, I buy my resistors from places like Tayda at $0.03 each
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well i certainly didn't mind the cents that the resistor cost more the soldering of the board. anyways i agree with whats being said here i just wanted to understand the fundamentals behind it.

thx for all the input.

anyways circuit is done and its right on the sweetspot:
10mA a Pop for a total of 60mA draw at 12V...woho smiley


still have to get some experience soldering but it worked out okay..


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and the updated schematic for people to reference:
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I got these zero-ohm resistors for $4 for a batch of 500:

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