Found in the February 1997 Electronics Now magazine, this circuit controls motors according to the transistor used. For the transistor indicated, the maximum current is 200 mA.
This sophisticated function generator circuit appeared in the September 1972 issue of Radio...
We found this circuit in a 1975 publication. The circuit can be made with more modern equivalent...
The open output voltage on this circuit is approximately three times the peak value of the input...