Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...
This circuit was obtained from a Radio Electronics from the 90's. It can generate signals up to a...
We found this circuit in a technical documentation on the National Semiconductor LM3909. The...