Lie detector circuit using two transistors
This simple lie detector consists of two transistors and other additional components and can detect if a person does not tell truth (the person is lying), using two sensors placed directly on the skin.
Lie detector circuit using two transistors
This simple lie detector consists of two transistors and other additional components and can detect if a person does not tell truth (the person is lying), using two sensors placed directly on the skin.
This temperature to voltage converter circuit, convert the sensed temperature by a thermistor into a voltage level.
The circuit achieves an acceptable performance between 0 and 24°C
This simple humidity sensor circuit using a 555 timer, shows us the humidity level that a ground under test has. To achieve the goal, a couple of probes are used.
These probes are placed on the ground to be tested.
The temperature gauge circuit is implemented using four comparators. We use the LM324 integrated circuit, which has four 741 operational amplifiers (op amps) in a single package.