This General Electric circuit, in a documentation from the 1960s, allows the use of high resistance resistive sensors with unijunction transistors in a relaxation oscillator.
We found this FET-stabilized circuit in an American documentation from the 90s. With the values of the...
This circuit with a bargraph scale was found in a 90s Popular Electronics. The circuit measures...
The presented circuit uses an LM3900, transconductance operational amplifier. It was found in the...