How can I make a polygraph detector?

Answer 1

The simplest way is to hook up a 9 volt battery to an ammeter and make a series circuit with your test subject wearing two wires taped to the back of his/her wrists. This is primitive and unreliable, but makes a neat science project anyway becauses it shows how a real polygraph works.

Answer 2

Take a couple of circuit boards from some old electronics, attach them all to a box, or something, try to get some of the LED's to light up. Use lots of extra wires, and anything else you can find. Writing 'polygraph detector' on the box is optional.

Set a fully charged car battery next to it, run a few wires from the battery back to your 'polygraph detector' and then to a pair of velcro wrist straps--attach some round flat contacts onto the inside of the straps.

Have your victim sit down and put the wrist straps on (don't worry, the car battery won't actually shock them) and then flip your 'polygraph detector' on. If you want--wire an old broken radio into the box that will give you some static and clicks.

Tell the victim that your machine can detect lies and will administer a severe electric shock if it determines that the user is lying.

Proceed to asking questions. Most polygraphs just detect stress in a users voice, or by some other factor, such as heart rate, or persperation--anyone with good perception skills can tell when the average person is lying anyway, but with the person thinking they are going to be risking electric shock, the telltale signs of lying will be amplified to the point that just about anyone should be able to tell whether the person is saying something thats not entirely true.

Answer 3

how can you make a ploygraph detector do what?

C'mon man- finish the question!