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Using skin to complete a circuit

Former Member

In a recent article there was a excerpt about a Luger pistol(for those unfamiliar with firearms, a Luger is an early semi-auto pistol made in Germany), which had a special attachment flashlight. The light is activated by gripping the pistol in your hand, the are two small brass contacts that the skin touches and completes the circuit. My question is in reference to using this type of switch to turn a small laser diode, embedded in a pistol grip, on and off.

The laser diode that i have in mind is 3v and 30ma, would this be safe to use in this type of system? How much voltage and/or current could a human tolerate without death or injury?

For those interested the pistol that was my inspiration may be found here: Extremely rare Luger 'Night Pistol' featured early tactical light - Guns.com.

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  • 0

    For the use of tactics and wanting the light/laser on/off at a moments notice/when it is needed. Why not place one contact point on the trigger it's self for the laser? You only really need it when you are about to fire or if you are an actor in Holywood.

     

    as for the resistance and using gloves. This is just an idea and I don't know how it would be done safely or efficiently but why not impregnate the outer layers of the gloves in a conductive liquid with the intent that it would dry, leaving conductive residue in the material. One idea being dissolved copper. Again, I am unsure how safe that specific idea would be.

     

    A much better, alternative idea would be to use an RFID chip in a finger tip of the glove then have the receiver on the base of the flash light/laser sight then you can simply tap the receiver to toggle the light on/off quicker and easier than twisting the top of the flash light.

     

    Falney

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  • 0

    For the use of tactics and wanting the light/laser on/off at a moments notice/when it is needed. Why not place one contact point on the trigger it's self for the laser? You only really need it when you are about to fire or if you are an actor in Holywood.

     

    as for the resistance and using gloves. This is just an idea and I don't know how it would be done safely or efficiently but why not impregnate the outer layers of the gloves in a conductive liquid with the intent that it would dry, leaving conductive residue in the material. One idea being dissolved copper. Again, I am unsure how safe that specific idea would be.

     

    A much better, alternative idea would be to use an RFID chip in a finger tip of the glove then have the receiver on the base of the flash light/laser sight then you can simply tap the receiver to toggle the light on/off quicker and easier than twisting the top of the flash light.

     

    Falney

Children
  • 0 in reply to sqkybeaver

    Why would it not be safe?

     

    Because of an accidental fire?

     

    The idea was that the red dot popped up right as you were about to fire. i.e. something to give you an idea where the bullet would hit. e.g. if firing from the hip. as I said, you only really need the laser sight right as you are about to fire, which if you are going to fire, you would have your finger on the trigger. besides, bridging a connection or using an RFID chip is unlikely to cause you to involuntarily pull the trigger.

     

    If there is some other reason why I was wrong then sorry, but please correct me properly rather than just saying "It's not safe" that is hardly constructive.

  • 0 in reply to Former Member

    let me clarify.

     

    An accidental firing is always a lapse of safety protocol.


    using the trigger itself for a switch is not safe. here is why. there is only one circumstance when you should put your finger on the trigger, when you intend to put a projectile down range.

    there may be many reasons you would want to activate a laser sight or flashlight without discharging. sometimes a red dot on an assailants chest is all it takes to stop an attack. sometimes you just need to see in the dark.

     

    as far as having it dependent on another piece of hardware, I think that would not be a wise investment of r&d or money. anything that is a possible failure point usually does not catch on.

    safety interlock systems of many types been around for decades but I have yet to see one in person.