Diodes: the shortest Hackaday article ever ... The first shows the anode tied to ground through R1 and the cathode tied to the Vcc power rail. The diode is in reverse bias, and no current is ...

You know just what to do. The ground pin of a LM7805 connects to the cathode of a TL431 programmable Zener diode pulled from an old scrapped TV. The diode is referenced to a voltage divider ...

The triangle represents the anode, and the line represents the cathode. Forward-biased diode: an ideal diode conducts electricity when a voltage of 0.6V is applied in the forward direction.