[sdiy] Protection Device?

Tom Wiltshire tom at electricdruid.net
Tue Jun 19 23:13:38 CEST 2018

I doubt there’s a way that’s significantly easier than three or four basic parts. Do you really need a Schmitt trigger? Doesn’t the uP have Schmitt inputs?

Using an op-amp that clips the input to its rails as Olivier suggests is a different approach that I’ve used sometimes but whether that’s much “simpler” is an open question. I suppose it sort-of counts as “one component”, but it feels like more circuitry to me.


       Electric Druid
Synth & Stompbox DIY

> On 19 Jun 2018, at 20:52, 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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