This circuit with the ULN3784B appeared in the October 1984 issue of Radio Electronics magazine. It can typically be powered from 9 to 24 V.
This interesting control circuit was found in an Electronics Now from 1988. Through it we can...
Found in a 1964 Electronic Design, this circuit must use transistors according to the supplied...
We found this circuit in a 90s Popular Electronics. The circuit can be implemented with modern...