This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
In the figure we have the way to obtain an adjustable constant current source of 2 mA. The...
We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted...
This circuit provides an output voltage approximately 2 times that of the input voltage. The...