This circuit was found in an American documentation from the 80's. The components are from that time. It provides a variable output of 18 to 30 V with a current of 200 mA.
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...