Answer 7—The following hookup creates a 1-A current source whose terminals will never have more than 1 V across them. If the terminal voltage attempts to exceed 1 V, the excess current is shunted by the diode through the voltage source.

The following hookup creates a 1-V voltage source that will never supply more than 1 A. If the load draws less than 1 A, the excess current from the current source is shunted back around by the diode. If the load attempts to draw more than 1 A, the diode stops conducting and the current throughout the circuit is limited by the current source.

Contributor: David Tweed