Protection against 230 Vac when input port should receive signal btw 0-24Vdc

Discussion in 'General Electronics Chat' started by flote21, Mar 31, 2016.

  1. flote21

    Thread Starter New Member

    Mar 19, 2016
    Hello guys!

    I need to design a protection circuit to avoid the destruction of a digital input port. This digital port should accept signals between 0Vdc and 24Vdc. However it is pretty easy to connect a power supply connector with 230 VAC to this input port because both connectors are very similar. Therefore to avoid this wrong connection i need to design an easy protection circuit with some LEDs in order to indicate to the user that the connection is wrong. Anyone has an idea about what component can i use?

  2. vk6zgo

    Active Member

    Jul 21, 2012
    Don't use connectors that are very similar!

    Change one to be completely different.
    Even if you have to retrofit each & every unit in existence.

    If you blow up a device,or a person,or start a fire,having a magic gadget that is supposed to warn people won't get you far in court!
  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    I second the change connectors..
    Silly/Dangerous to use similar connectors in the first place.. Fix that big problem..