Connect with us

Help with circuit

Discussion in 'General Electronics Discussion' started by waltztj, Oct 13, 2018.

Scroll to continue with content
  1. waltztj

    waltztj

    3
    0
    Oct 12, 2018
    On this circuit I am going to change the sol to 24 volts from 12 volts. I am wondering if all the parts will work with 24 volts.If some need to change what should I use. I am changing the power supply to 24 v also.

    Walt
     

    Attached Files:

    Last edited: Oct 13, 2018
  2. Externet

    Externet

    754
    164
    Aug 24, 2009
    The 1K resistor should be raised to maintain the same current specified, and it may not shut-off if the base is not connected to emitter with another resistor to ensure it.
     
  3. waltztj

    waltztj

    3
    0
    Oct 12, 2018
    OK thanks...what would you recommend ? I can build it but I can't design it.
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

    10,834
    2,443
    Nov 17, 2011
    Use a 2.2 kΩ resistor instead of 1 kΩ.
    Of course the relay must be a 24 V type also.
    Photocoupler and transistor are o.k.

    The circuit is good for a relay current of up to ~400 mA.
     
  5. waltztj

    waltztj

    3
    0
    Oct 12, 2018
    Thanks
    This is what the sol draws.
    I have more info ….the sol is 24 v at 4.8 watts it will be on for no more than 50 milliseconds at a time. This is for a high speed drip machine.
     
  6. Alec_t

    Alec_t

    2,911
    791
    Jul 7, 2015
    Depending on the inductance of the solenod, 50ms may not be long enough to allow the current to build up sufficiently for the solenoid to pull in.
     
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

-