The configurations of the two previous circuits can be modified to operate with a simple power supply, as shown in the diagram below. The circuit provides 500 mA currents at 500 ohms load and can be powered by voltages from 14 to 32 V.

The configurations of the two previous circuits can be modified to operate with a simple power supply, as shown in the diagram below. The circuit provides 500 mA currents at 500 ohms load and can be powered by voltages from 14 to 32 V.