electric shocker resistance and housing problem, i only have a week or two until the secret santa party Answered
in an attempt to provide a rather "interesting" christmas present as a joke for a colleague i have assembled an remote controlled electronic shocker device ( perfectly safe almost no current at all) by wiring an electric shocker of a design i am familiar with making so that it's power is provided by wires which previously went to the motor of an RC car( i intend to do an instructable on how it was built, if i get it to work!). the arrangement is constructed from the charging circuit of a disposable camera with the capacitor chopped off and replaced by the electrodes that will connect to my receiver's( my colleague) hand, the AA battery has been replaced with a remote controlled power supply ( same voltage and ampage as an AA battery)system. Enough on what i have built( unless you need more details to help me), here is my problem.
I had originally intended to place the shocker in a small box and attach each output high voltage wire to a tin foil half wrapped over half of the box( i would cover the join with a ribbon) the plan was that when someone picked up the box their hand would form a connection across the tin foil halves and therefore their hand would be acting as a resistor in a high voltage circuit so a (very tiny less than 0.25 milliamps) current would pass through it( whether the voltage is applied across the two halves can be controlled by a remote hidden in my pocket so when other people pick up the parcel they get no shock). but i have found that ,although the output wires are at a high enough voltage to shock someone, the resistance of the tin foil means that the remaining voltage to go across the person's hand is not enough to shock them. ALSO the shocker will work across about a centimetre of skin ( like touching both wires with the tip of the same finger) but when the contact points are as far apart as a whole hand( like thumb to last finger) the increased resistance of the hand means that the current is so small that i cannot even feel a tingling when i test it( i had a few (willing volunteer)friends who are working on this with me also test but it could not shock them either). so my problem is that i must either find a much lower resistance form of contacts to coat the halves of the box( i have no means of using expensive materials or ones that need to be heavily worked on before attaching( like metal plates that must be attached to each face of the box)) or a ( very quick and simple, i only have about a half an hour slot of time to do any soldering before the party ) way to boost the voltage ( i was thinking of attaching extra batteries but suspect this would not work and also am unlikely to get an opportunity to do much electronic alteration) or ( most promisingly) must find a way to house some very bulky parts in a housing where i can guarantee that my colleague will touch both electrodes with one finger without suspecting anything until he gets shocked( this needs to be something like the switch on a torch rewired so that the electrodes are on the switch or whatever, or any other gift where the "obvious" thing to do is put a finger on a certain metal point for some reason( preferably when picking the present up)).
I have already addressed any safety concerns so please do not criticise me for this as electric shocks are harmless provided the current is low enough and does not cross the heart.( i have a very low current with both electrodes on the same hand on top of which it only shocks when i press a button on the remote).
ALSO please do not suggest i rebuild the whole circuit as i know that the circuit works fine and i do not have time to build it all again or do any serious modifications, THANKS
any answers would be appreciated, THANKS
i think i have found solution,it is really awesome and involves placing a battery in parrallel with the power lead into the shocker from the remote control system. i am not sure why it is working but i suspect some effects similar to capacitors are involved, the really weird thing is it does not shock you when you grab the box but rather when you pull your hand away.
incase i find any other problems this thread is still open to suggestions and ideas for other solutions, assuming the system works perfectly after i have soldered my modifications in place( a few days time before i get a chance to use a soldering iron) then i will no longer need any help( providing nothing else goes wrong). thanks for reading all of this.