How to Use the Lie Detector

The Lie Detector needs tuning before it can be used, and it needs tuning for every person that uses it as everyone has slightly different skin.

Touch the two probe wires against the palm of your (dry) hand, such that the metal ends are a couple of centimetres apart (the metal ends must not touch each other). Adjust the tuning control (VR1) until the red light (FALSE) just goes out. The Lie Detector is now tuned for your skin. If you lick your palm and touch the wires against it again, the red light should come on brightly.

You should now understand how to use the Lie Detector to detect a real lie. Touch the two probe wires against the palm of the subject's hand and adjust the tuning control as before until the red light just goes out. When the subject tells a lie, and begins to sweat, the red light will get brighter.

It must be emphasised that the Lie Detector won't detect every lie, as it is really only a sweat detector. It only detects lies that have consequences to being told, lies that cause the subject to sweat (with fear). Pretend or 'joke' lies won't have any effect.

The Lie Detector has a number of other uses, detailed below, and it could perhaps more accurately be described as an 'Experiment Machine'.

• Testing the conductivity of the human body. Get a group of people to hold hands in a circle with the two probes of the Lie Detector as part of the circle. See how many bodies the current will flow through to make the red LED light.
  
  
• Testing the conductivity of objects. For example, metals, plastics, wood, hair, the lead of a pencil. If a material is conductive then touching the two probe wires against it will make the red LED light.
  
  
• Determining whether a houseplant needs watering. Touch the two probe wires against the soil. If the green LED stays on, the plant needs watering. If the red LED comes on, the soil is sufficiently moist.
  
  
• Determining whether a cake is cooked. Press the two probe wires into the surface of the cake. If the red LED comes on then the cake is still moist and needs further cooking.