. .

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. 28-06-2019 #5
    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.
    found this circuit of the 4ch opto-isolator board online
    Click image for larger version.  Name: BUCCK-817-4-1.jpg  Views: 1935  Size: 44.0 KB  ID: 25980

    looking at this photo it looks like the resistors are 1K (marked 102) and not the 3K on the circuit diagram !!!
    Click image for larger version.  Name: s-l1600.jpg  Views: 1861  Size: 202.1 KB  ID: 25981

    John

    PS
    once the details of the breakout board are known it will be possible to workout if the 1K resistor connecting the photo transistor to the output terminal will stop the BOB seeing the output switch

    PPS
    example
    two possible ways of connecting the opt-isolator board to a C11G breakout board

    Click image for larger version.  Name: revised C11G and opto-isolator.jpg  Views: 2294  Size: 239.5 KB  ID: 25982

    Click image for larger version.  Name: revised C11G and opto-isolator v2.jpg  Views: 2965  Size: 239.7 KB  ID: 25983

    revised diagram for your BOB can be made once I have details of the BOB

    with the 1K resistor on the opto-isolator board the opt-isolator board limiting the current
    I think your going to need to add some form of lamp driver to operate the bulbs on your iluminated switches
    an octal darlington array - possibly ULN2803 should work
    ULN2803 pdf data
    Click image for larger version.  Name: uln2803a.pdf  Views: 327  Size: 230.2 KB  ID: 25984


    what current does the bulbs take ???
    Last edited by john swift; 28-06-2019 at 05:58 PM. Reason: add PPS ref to lamp driver
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Opto isolated Bob and drivers causing a strange fault.
    By lucan07 in forum General Electronics
    Replies: 2
    Last Post: 02-05-2016, 09:28 PM
  2. NEW MEMBER: Re my question
    By oldwoodworker in forum New Member Introductions
    Replies: 32
    Last Post: 20-09-2013, 09:07 PM
  3. To usb,or not to usb,that is the question.
    By Jumbo in forum General Discussion
    Replies: 11
    Last Post: 17-10-2011, 09:21 PM
  4. question ...
    By Wobblybootie in forum General Discussion
    Replies: 6
    Last Post: 04-01-2010, 12:04 AM
  5. 3 axis opto for £75
    By irving2008 in forum Motor Drivers & Controllers
    Replies: 4
    Last Post: 02-07-2009, 11:44 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules