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Zener Diode

EMC

Mar 7, 2017
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Mar 7, 2017
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what happens if zener diiode is connected in parallel before a resistor
 

garublador

Oct 14, 2014
111
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Oct 14, 2014
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111
To me that looks like the diode is just there to protect the PC0 pin from going above ~5V. Net SPEED_INP is getting divided in half, probably to comply with the voltage specs for pin PC0 and the diode is there as a safe guard in case net SPEED_INP goes above ~10V. At least that's why you normally see zeners used in that manor.
 

EMC

Mar 7, 2017
5
Joined
Mar 7, 2017
Messages
5
To me that looks like the diode is just there to protect the PC0 pin from going above ~5V. Net SPEED_INP is getting divided in half, probably to comply with the voltage specs for pin PC0 and the diode is there as a safe guard in case net SPEED_INP goes above ~10V. At least that's why you normally see zeners used in that manor.
got it.
thank you!
 

Minder

Apr 24, 2015
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Apr 24, 2015
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That would be my take also, just a 5v clamp for safety.
M.
 
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