This circuit was taken from an article in Electronics Now magazine in February 1995. The power supply must be dual and other operational amplifier can be used.
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...
Found in the 2005 Linear Technology Application Manual, this circuit controls the torque of a...
This circuit was found in the Italian magazine Radio Elettronica from September 1977. It consists of a...