This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its control is digital with TTL logic of 5 V. The components used are still common today.
Found in American documentation, this switch is based on the 4093. The load will determine the...
The purpose of this circuit is to compare transistor gains in order to obtain matched pairs that...
This circuit comes from a Gernsback Publications of the 90s. The circuit uses a general-purpose transistor as...