SunFounder ESP32 Starter Kit
In this circuit, when the button is pressed, IO14 is high.
By programming IO26 to output high, after a 1k current limiting resistor (to protect the transistor), the S8050 (NPN
transistor) is allowed to conduct, thus allowing the LED to light up.
3.24. 5.6 Two Kinds of Transistors 375
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