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  1. 16-06-2018 #10
    Doddy's Avatar
    Lives in Preston, United Kingdom.
    Doddy
    Last Activity: 1 Week Ago Has been a member for 9-10 years. Has a total post count of 1,364. Received thanks 188 times, giving thanks to others 66 times. Referred 1 members to the community.
    Just a casual observation for anyone looking to re-use these schematics.

    Some, probably not all, but certainly the cheap and nasty BoB that I have in front of me (and I've just re-tested) - which provide a 0-10V output to the spindle, and a 12-24V supply to provide this 10V reference on board... will use this same onboard 10V supply to drive the LED anodes on the opto-isolator inputs (so to switch the input, you connect the coupler's LED's cathodes to ground [via sensors, etc]).

    My point?, for these cheap BoBs, to use the inputs you still need to supply a 12-24V supply, as well as a 5V supply to the BoB.

    Like I said, probably won't apply to all BoBs.
    Last edited by Doddy; 16-06-2018 at 02:38 PM.
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