Connect with us

Ex-Genius needs help

Discussion in 'General Electronics Discussion' started by VictorTango, Jul 8, 2009.

  1. VictorTango

    VictorTango

    1
    0
    Jul 8, 2009
    I am working on a project and I need a bit of help. Here's the scenario;

    I am using a CYC63743C USB controller and want to run an isolated 17V relay. I am trying to use a 4n35 optocoupler to run the relay but can't seem to get the 4n35 to fire (or so it seems). I have tried using a 1k resister (and many other values) in line with the 5v i/o pin on the USB controller but can't get the relay to fire (on the output side of the 4n35). I believe I have everything wired correctly as far as polaruty is concerned.

    Perhaps I am incorrect in believing I can use the 4n35 to act like an analog switch. I need some way of firing the 17V relay and definately want an isolated circuit. Anybody have any ideas? I need to keep it as low cost as possible.

    :confused:
     
  2. neon

    neon

    1,325
    0
    Oct 21, 2006
    a rerlay means mucho power you are killing the 4n35 try to add a power transistor or some kind of power driver then it will work.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-