Schmitt Trigger: Robust Comparator Design with Hysteresis

Discussion (7 Comments)Read Original on HackerNews

wrigby•about 2 hours ago

It's worth point out that on many microcontrollers (STM32's at least), configuring a pin as a "digital input" means that the signal is routed through a Schmitt trigger circuit that's built into the MCU.

This also means you'll want to ensure that any floating MCU pins are _not_ configured as digital inputs, as the Schmitt trigger circuit itself will waste power switching back and forth between high and low states constantly.

aappleby•about 2 hours ago

Slop

blagie•about 2 hours ago

I don't think it's slop -- the sources are books and it doesn't read like slop -- but the sources are more worth reading. It's more like an undergrad trying to fill word count, without getting why this is interesting.

skippyfish•about 1 hour ago

It's 100% AI-generated, including nonsense illustrations. And it's just so pointless too - there are many good, better-illustrated, and better-explained human articles about the same circuit.

userbinator•41 minutes ago

The "not gate inverter" is particularly nonsensical.

neerajsi•34 minutes ago

I feel like I learned something from this about the high level need and attributes of the schmitt trigger design. But I'm sure I'd need to read the actual my sources to realize the physical design.

However the general idea of using hysteresis for signal conditioning seems transferrable to other non physical control systems. I suspect that people who think about what the article is saying rather than reflexively declaring it to be slop could learn something useful.

jacquesm•about 1 hour ago

This is without a doubt slop.

https://news.ycombinator.com/user?id=jay_wevolver

Is the account that used to heavily push this domain, I'm surprised it hasn't made it to the banlist.

Schmitt Trigger: Robust Comparator Design with Hysteresis

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Discussion (7 Comments)Read Original on HackerNews