i havent a clue what to actually call this, as i am very limited to my electronic knowledge but im going to have a go at learning!! what im after is shall i say a "12volt pulse unit" so that if i connect it to a battery it will send constant pulses to whatever i connect it to. can someone tell me what to call this "thing"!! as i dont know what to call it and therefore i dont know what im looking for on the internet and so therefore i cant buy one! :'(