this post was submitted on 15 Jan 2024
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Does an old school washer dryer that runs off timer relays / knobs / push buttons really have a CPU? I ask because that's how mine is and I haven't had to look at the controls but they seem dead simple to me. I get there's different cycles but some simple ladder logic should be able to handle that, no? Half the world runs on simple machines like that.
Nope, it's just a timer-drive. cam triggering switches. The physical cam IS the CPU.
We have reached a point in time where there are adults who think everything that runs through multiple steps must have a microcontroller, because only really really old machines* do without.
*For the most part. I bought a brand new whirlpool dryer late last year, and it has a mechanical timer in it.