[sdiy] Protection Device?

[john slee]

Have you verified that your microcontroller doesn't already have internal
clamp diodes on its input pins?

(some do... AVR I think, and maybe PIC? Though the supply voltage you
mentioned elsewhere hints that you're not using AVR)

John

On 20 June 2018 at 05:52, Tim Ressel <timr at circuitabbey.com> wrote:

> Hi,
>
> I am forever duplicating a circuit for protecting processor inputs: a
> series current limiting resistor, a pair of schottky diodes for clamping to
> ground and pos rail, and sometimes a schmitt trigger buffer. Is there a
> single component that does this?
>
> --
> --Tim Ressel
> Circuit Abbey
> timr at circuitabbey.com
>
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