This circuit was found in old Maxim documentation. Check the availability of the IC if you are going to build the circuit. The output current is 1A.
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...
This circuit was found in a 90s Popular Electronics. It uses a varicap that admits equivalents. The...
This circuit is from an Electronics Now from 1998 and can be easily assembled with other JFET...