Introduction: The button is a sensor that allows the user to physically switch the circuit open or close, so it is commonly used as a control component.
The principle:Â The Button use a simple switch mechanism to control the connection state of circuit. Depending the construction of the button, it will have two normally states. Normally Open push button is one of common use button structure, default states is open circuit, the two terminal not connected each other, cause no current through. After pressed, the two terminal will connected and circuit will be close.
Specification:
- Operate voltage: 0 – 5V
- Interface:Â Analog
- Output voltage: 0 (pressed) / same as Operate voltage (not press)

Pinout Diagram:
Pin  Function
GÂ Â Â Â Ground
VÂ Â Â Â Voltage Supply
SÂ Â Â Â Output (same as Voltage supply)

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