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.
This circuit using only transistors was obtained from Ferranti's 1969 documentation. It can be...
This sensitive circuit can be designed with FETs such as BF245 and MPF102. The sensor is a silicon...
Found in Popular Electronics from the 90s, this circuit generates two tones that are selected by a...