The circuit is simple enough: it uses a capacitor, a resistor, and a pair of diodes (one of them a zener diode). He uses this basic circuit to drive simple regulators with input and output filter ...

YoYo Dyne Propulsion Systems' new family of Zener-enhanced dark-emitting diodes (ZeDEDs) features a novel junction ... precisely aligned to maximize dark emission. Images courtesy of MGM Entertainment ...