How to protect a microcontroller analog pin from continuous overvoltage? - Electrical Engineering Stack Exchange
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![Chapter 6: Diode applications (Power supplies, voltage regulators & limiters) [Analog Devices Wiki]](https://wiki.analog.com/_media/university/courses/electronics/text/chptr6-f5.png?w=600&tok=806b20 "Chapter 6: Diode applications (Power supplies, voltage regulators & limiters) [Analog Devices Wiki]")
Chapter 6: Diode applications (Power supplies, voltage regulators & limiters) [Analog Devices Wiki]
Does zener diode connected at the input pin of a controller affect the controller when internal pull up is enabled at that pin? - Electrical Engineering Stack Exchange
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A 5.1-volt zener diode clamps the output of the smoke alarm to about 5 volts, helping to protect the input of the microcontroller. You may also wish to add extra protection in
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How Does Zener Diode Do Overvoltage Protection in Circuit?
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