This 1.5 A circuit has the output voltages adjusted by a selector switch. We found it in a Popular Electronics from the 90s. The integrated circuit must have a heat sink.
This circuit was found in Motorola documentation from 1968, using high power transistors and...
Also able to use the LM291, this circuit was found in a Radio Electronics magazine from October 1977....
This circuit generates a linear sawtooth signal. The circuit was found in the December 1992 issue...