Guest Alun Posted April 10, 2005 Report Share Posted April 10, 2005 Look at the part number do a google search, type in "part number" datasheet, if that doesn't work ask a question in the datasheets section of this forum. Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 10, 2005 Report Share Posted April 10, 2005 I looked at the datasheet for the transistor I recommended in Google, and I found all kinds of important information that you need: Quote Link to comment Share on other sites More sharing options...
Codyhtml Posted April 12, 2005 Author Report Share Posted April 12, 2005 ok i got info on my transistor and soldered it in i hooked up the pot and it workes ether way it just reverses like you have to turn it left with it hooked up one way and turn it right hooked up the otherway but i checked ind i can't find any shorts i thinght that would be the problem it dosent work i can't get it to drop below .6 millamps and then if i put the electrodes on and have sombody lie or somthing it dosent change even if i touch the electrodes toghter without a person so i don't know i bad cap wouldent be the problem a reversed or bad cap and it wouldent be a problem eith the transistor would it or is there probably a short and i just can't find it sorry for asking so many questions most of you guys could build this in like 1 day with parts from your junk box but i guess i'd never learn and be able to help other people later if i never got help Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 13, 2005 Report Share Posted April 13, 2005 Hi Cody,The transistor isn't working or the batteries aren't 4.5V. The schematic shows a longer line for the positive terminal of each battery cell. Each of the two batteries are 3 cells and they could be AA cells.With nothing connected to the electrodes the meter should try to go backwards between 0.7mA and 3mA depending on the setting of the pot.With the electrodes shorted together, the meter should read between about 2.5mA (full scale for a 1mA meter) to backwards 3mA, adjusted with the pot and should be able to be zeroed. It should do the same if the capacitor is shorted. Quote Link to comment Share on other sites More sharing options...
Codyhtml Posted April 14, 2005 Author Report Share Posted April 14, 2005 well the baterys are a 4 case with one of the batterys replaced with a wire to have a 3 cell case and the transistor should be good hmm wait i think i rember what i did never mind i think i made a mistake i'll post if it works when i correct the mistake :p Quote Link to comment Share on other sites More sharing options...
Codyhtml Posted April 14, 2005 Author Report Share Posted April 14, 2005 i guess it must be a bad transistor:( Quote Link to comment Share on other sites More sharing options...
Codyhtml Posted April 14, 2005 Author Report Share Posted April 14, 2005 sorry for double post but i realised mabe that kind of transistor won't work with this project it was a 2n5014 or somthig i'll get a new one that will work some time when i go to the store Quote Link to comment Share on other sites More sharing options...
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