Bio-Feedback
To use this device in a bio-feedback mode for relaxation and tension reduction, set the balance pot to light the graph in the upper portion. As you relax or reduce tension the body’s resistance increases, which will be seen as a gradual downward sloping of the graph. When you reach the bottom you can re-a just the balance pot to bring it back up and then try to bring it down again.
Lie Detector
To use this device as a lie detector set the graph on the lower portion of the graph. Any stress will cause the graph to rise. There is a delay between question and response of about 1.5 seconds. Remember, this device is for entertainment purposes only. Even full-fledged lie detectors are fallible, and it could be the nature of the question regardless of the answer that would cause a stress reaction.
| Parts List | ||
| Item | Source | |
| IC1 | CMOS OP-Amp | Images Company |
| R1 | 68Kohm | Radio Shack |
| R2 | 100Kohm Potentiometer | Radio Shack |
| R3 | 2.2 Meg | Radio Shack |
| R4, R5 | 2.2Kohm | Radio Shack |
| C1 | .047uf | Radio Shack |
| SW1 | DPDT | Radio Shack |
| Misc. | 1.5V Battery and Holder, 2 Dimes for use as electrodes, Case with PC Board | |