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  1. 28-06-2019 #8
    john swift's Avatar
    Lives in merseyside, United Kingdom.
    john swift
    Last Activity: 18-01-2021 Has been a member for 9-10 years. Has a total post count of 257. Received thanks 53 times, giving thanks to others 0 times.
    looking at the photo of the opto-isolator board
    it has 3K resistors fitted as shown on the chinese circuit diagram
    so the output current is even more limited

    with a 3K or 3.3K resistor between the gate and source of the Fets you have you could wire the opto-isolator to pull the gate upto +12V (half of the 24V supply ) to switch the FET on

    Click image for larger version.  Name: opto-isolator with FET lamp driver.jpg  Views: 1874  Size: 187.2 KB  ID: 25986

    the BOB is like this I have looked at before
    Click image for larger version.  Name: CNC BOB .jpg  Views: 1951  Size: 265.9 KB  ID: 25985

    John
    Last edited by john swift; 28-06-2019 at 08:57 PM. Reason: add FET lamp driver
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