In two banks of six LEDs each, both LEDs connected to a single Arduino pin ... a diode, and it’s well known that diodes also have capacitance. In fact, this quality is exploited in varactor ...

PIN diodes are used as either switches or attenuator elements. Varactor diodes can be used in electronic tuning ... Transistor outline (TO) - TO-3, TO-66, TO-92, TO-202, TO-220, TO-237 and TO-247 are ...