Then knowing he needed 4 mA to power each LED for backlighting he used some 1978 vintage current limiting diodes designed to pass 2mA each regardless of voltage source, within limits of course.

The current limiting circuit, though ... he experimented with multiple configurations of resistors and Schottky diodes over a wide range of temperatures, from deep-freeze cold to hair-dryer ...

The series is a load switch IC developed to operate within a voltage range of 1.5V-6V and provide a maximum output current of 3A. It replicates the functionality of an ideal diode and integrates key ...