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Sensors electronic circuits design projects

Sensor based electronic circuits design projects and schematics

Lie detector electronic project circuit design using transistors

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.

Circuit Diagram: 
Lie detector electronic project circuit design using transistors
Electronic Circuits: 

Temperature regulator electronic project designed using L121

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.

Circuit Diagram: 
Temperature regulator electronic project designed using L121
Electronic Circuits: 

Hydro alarm circuit diagram

This hydro alarm circuit detects the absence or reduced amount of water in a container.

Circuit Diagram: 
Hydro alarm circuit diagram using CMOS
Electronic Circuits: 

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