Connect with us

Voltmeter ammeter off ebay

Discussion in 'General Electronics Discussion' started by Mr Random Guy, Jun 1, 2016.

  1. Mr Random Guy

    Mr Random Guy

    12
    0
    May 9, 2016
    I am quite confused about this dual voltmeter ammeter I want to get off eBay. Please tell me which of these two circuits is right (at least I hope one is right).

    So the first idea is that the measuring positive voltage wire and the common negative (between the ammeter and voltmeter) connect to the PSU in parallel with whatever load is connected. My PSU has screw down terminals so I'm thinking solder the two wires onto the base of this so the terminals are still available for loads. The current measuring positive wire would be also connected to the positive of the psu.

    The second idea is that the current measure wire would connect to the cathode of the load instead of the positive of the PSU.


    I think the second idea is correct because ammeters should always be in series right?
     
  2. davenn

    davenn Moderator

    13,290
    1,756
    Sep 5, 2009
    yes in series, usually between the + terminal of the PSU and the load
     
  3. Mr Random Guy

    Mr Random Guy

    12
    0
    May 9, 2016
    Agreed but since the negative wire of the ammeter is common between the ammeter and voltmeter I have to put it in series between the cathode of the load and the - terminal
     
  4. davenn

    davenn Moderator

    13,290
    1,756
    Sep 5, 2009
    ????


    it's well time you showed photos / links to these meters
    its VERY difficult to figure what you are saying otherwise
     
  5. Mr Random Guy

    Mr Random Guy

    12
    0
    May 9, 2016
    Its okay I figured it out I found a diagram :)

    The yellow wire must be measuring voltage and the thick red wire measures current
     

    Attached Files:

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

-