Connect with us

PIC outputs driving relays directly?

Discussion in 'Electronic Design' started by Steve Sousa, Oct 3, 2003.

Scroll to continue with content
  1. Steve Sousa

    Steve Sousa Guest

    Hello:

    Has anyone used PIC outputs to drive small relays directly?
    Would there be any advantage in using a driver transistor, provided the high
    side of the relay is the same supply as the PIC, 5 Volts.

    Thank you.
     


  2. I've driven small reed relays directly from the PIC's outputs with no
    problems. The relays were rated at 5V 20mA and had internal diodes to
    suppress inductive transients from the coil at turn off. I guess it should
    be OK, as long as you are within the PIC's outout current spec and always
    use a diode (reverse-biased across the coil terminals).

    cheers,
    Costas
     
  3. Steve Sousa

    Steve Sousa Guest

    Hello:

    Thank you both for your answers.
     
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

-