This automotive circuit was obtained from an 80's schematic from the integrated circuit factory itself. The voltage regulator is still common, but the operational amplifier is of the time.
Texas Instruments REF33x Voltage References can be obtained from Mouser Electronics. These small...
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
This circuit, which in our times would be called a shield, can also be used with other loads. The...