This circuit is from a 1968s Motorola documentation. The load can range from 10 to 100ohm and the transistor supports a modern equivalent such as 2N2222 or BD135.
Found in documentation from the 1980s, this circuit uses an operational amplifier from that time....
This circuit was found in a Popular Electronics from the 90's. The circuit can be used to convert...
This circuit is used for remote current monitoring. In the original version of the 80s a lamp is...