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I've been working on automating an old hotplate + stirrer and ran into a similar problem of how to variably control the speed of the AC stir plate motor. After some research is appears the best (and possibly only?) way to control most AC motors requires complicated frequency/voltage control. An...

+1 for not buying. I bought the book. John Palmer does a great job of introducing many beginner and advance topics, but I found the book severely lacking when I wanted to delve deeper. Most notably, misprinted equations and a lack of references for further reading on most topics left me at best...

I'm in a similar position in addition to having a cheap electric stove that could not handle a large stock pot. The plugs in my kitchen are GFI and split onto two separate 20amp breaker, so I built an electric kettle by installing 2 1800watt water heater elements in a 32quart stock pot. I plug...

@Denny The Crabtree effect is interesting, and seems to be even more relevant in the presence of hops, I've already pulled up a few reviews on it to read later. Do you know where I can find approximations for the levels of glucose in wort? As for the lag phase. The term is usually used to...