Instead of connecting the transistor base to power, we will connect it to one of the mini-D1 output pins (we chose D0). In this case, the firmware causes the ESP8266 to raise pin D0 high when it ...

The transistor acts like an insulator or a switch that is turned off. When a positive voltage is applied to the base, electrons are pulled out of the junctions and they no longer act as barriers.

The n-p-n transistor is made by placing a p-type material between two n-type materials. The p-n-p transistor is made by placing an n-type material between two p-type materials. All these components ...

These are analogous to the terminals on a bipolar transistor, in that the source fulfills a similar role to the emitter, the gate to the base, and the drain to the collector. Thus the three basic ...

Electricity can race through. The transistor base (the "meat" of the sandwich) acts like the handle on a faucet. Turn it one way and current will gush through like water through a hose.