This lie detector electronic project is designed using few common electronic parts. This lie detector can test a person whose status is modified in certain situations (as in the polygraph test) by "observing" biofeedback. Because a person's skin resistance depends on the state in which that person is, skin resistance increases with depth state of relaxation.
This temperature regulator electronic project is designed using L121 integrated circuit manufactured by SGS THOMSON .
The circuit can be used to regulate the temperature inside a vehicle and require a supply voltage of 12 volts.