Not quite...technion wrote:Hey guys,
I'm just looking to build a GPIO protection circuit for my two in-use inputs as detailed here:
(using a zener and resistor)
Is it as simple as it appears to put a red LED between the zener and GND, to create a "error light" ?
Thanks, that's an awesome answer (glad I didn't try it).aTao wrote: Not quite...
The zener will permit max 3V3 (in this case), with a LED in series the limit voltage will increase, the LED will start to turn on at ~0V7 and go as high as 1V4 ~ 2V0 in some cases (meaning you have )
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