Keyestudio ESP32 - 3. Wiring Diagram

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ESP32 Starter Kit

2. Working Principle

When the button is released, a voltage VCC passing through R29 provides a high level for S terminal. When pressed,

pin 1 and 3, pin 2 and 4 are connected and voltage on S1 arrives GND as a low level. At this moment, R29 avoids a

short circuit between VCC and GND.

9.2. Scratch Project 227