Switched 3.5mm socket?

Discussion in 'General Electronics Chat' started by tobyw, Jun 3, 2013.

  1. tobyw

    Thread Starter Member

    Mar 21, 2013
    I want to make a small radio where the battery is connected to the socket by inserting the earphones into a 3.5mm socket - to avoid having a separate on/off switch.

    Is there such a thing as a normally open 3.5mm headphone socket? I can't find one which is described as such - but probably I just don't understand the schematics and how you would connect them to achieve this..

    I have some sockets like this


    Could anyone tell me - can I use this to connect the battery when the earphones are inserted, and if so, what pins would be connected to what?

    Last edited: Jun 3, 2013
  2. k7elp60

    Active Member

    Nov 4, 2008
    You cannot use this jack to connect the battery because contacts B&F and G&E are shorted to each other. When inserting the plug into the jacks the contacts open. Generally contacts D& E are connected to the audio output source like speakers. When the earphone plug is inserted the audio to the earphones and turns of the speakers.
    I am not aware of a jack to do what you want to dol
  3. Ramussons

    Active Member

    May 3, 2013
    Since you want to make the radio, do you have a schematic? Sometimes it may be possible to power the radio thru' the earphones itself.