Connect with us

Running a 24v relay from mains voltage?

Discussion in 'Electronic Basics' started by DaveC, Nov 21, 2003.

Scroll to continue with content
  1. John Fields

    John Fields Guest

     
  2. DaveC

    DaveC Guest

    Thanks, John. One more option.
     
  3. Hello Dave,

    I just installed my newsreader, so I do not know if anyone reads this, but
    here goes:

    I had a problem like that once, I solved it with a rectifier for the mains
    and a 4093 as a gated oscillator to drive a 600V switsch mosfet.
    Very small circuit, not a lot of heat generation.

    In your case, you can use one of the spare ports on the 4093 to generate the
    time delay again with small parts.
    You can use a resistor/zener to generate the low voltage rail for the 4093.
    Don't forget to add a clamp diode, otherwise the mosfet will probably not
    survive.
    Oscillator frequency is not critical, I used 50KHz.

    Hope this helps.

    Kind regards,
    Jochem.
     
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

-