This circuit for controlling a model of an elevator via wire was found in the December 1997 issue of Electronics Now magazine. DC motors must be rated at the voltage of the transformers.
The integrated circuit used is a voltage reference from Motorola. This configuration was obtained in...
This circuit is from a Radio Electronics from October 1970. The circuit uses transistors from that...
This circuit was obtained from a 1977 magazine, but can still be mounted using BC548 for TR1 and...