2v Relay

Discussion in 'Electronics & Electrics' started by [AFX]Northy, Jan 2, 2020.

  1. [AFX]Northy

    [AFX]Northy Member

    Joined:
    Sep 24, 2003
    Messages:
    1,139
    Location:
    Brisbane
    Hi All,

    I have a little project and I have been stumped trying to find a 2v relay. The source trigger voltage is 2v DC and this will switch 12V DC on the other side. Is there another way?
     
  2. Jazper

    Jazper Member

    Joined:
    Jul 28, 2001
    Messages:
    2,632
    Location:
    Melbourne Australia
    Easy, DC-DC boost converter, what is your average relay on time?

    Alternatively you could just use a logic level mosfet....

    google mosfet as a switch
     
    Last edited: Jan 2, 2020
  3. aXis

    aXis Member

    Joined:
    Jun 27, 2001
    Messages:
    5,447
    Location:
    Kalgoorlie, WA
    Different way, use a transistor instead of a relay.

    2V is a bit low for even logic level MOSFETS but will easily drive a BJT. A power transistor could switch the load directly, or a small signal transistor could drive another P channel MOSFET.

    Edit: do the circuits have to be isolated?
     
    Last edited: Jan 2, 2020
  4. merlin13

    merlin13 Member

    Joined:
    Apr 12, 2003
    Messages:
    1,927
    Location:
    back in BrizVegas
    You'd also better confirm the ammount of current you can sanely pull out of or sink into that 2 volt signal source, if you're going to look at buck converters and directly driving high-power transistors.

    Another option could be grab some 3 volt operating relays and see if they'll reliably run on 2 volts. The operating word in that concept though is "reliably"...
     
    Last edited: Jan 4, 2020

Share This Page

Advertisement: