Build yourself a cheap digital boiler power regulator

Discussion in 'Beer Brewing "How-To" Guides' started by foxbat, Oct 22, 2017.

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  1. May 12, 2018 #21

    Druncan

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    Well explained write up, well done!
    I would love to see someone do the next stage where you control a Buffalo 3kw ind hob by temp with a PT or smartPid hack,,,
     
  2. May 13, 2018 #22

    Fil

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    how is the induction hob controlled?
     
  3. May 14, 2018 #23

    Druncan

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    It has a dialled knob with 26 steps. I have found the part as a replacement https://www.nisbets.co.uk/buffalo-control-panel/ad153
    Could this be replaced with a digital controller from a PID? happy to buy one and send it to those who know the dark digital electrical science,,, :thumb:
     
  4. May 30, 2018 #24

    Simonh82

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    I'm in the middle of a very slow kettle RIMS build using and Inkbird PID and non-digital controller as per @Bigcol49 design. In the back of my mind, I was thinking about a future upgrade to a 50L kettle and 3KW Buffalo induction hob. If I did that, I thought I would keep the PID for temperature control but use the buffalo hob to control the power during mashing. @Druncan, why can't you just use the built-in power control on the Buffalo hob? I guess the PID would be constantly switching the hob on an off which it may not like.
     
  5. Jul 22, 2018 #25

    BeerCat

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    Finally got around to wiring one of these up to an STC1000. Will give it a test tomorrow with the mash. My PID needs a serious retune so looking forward to trying this out. :)
     
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  6. Jul 23, 2018 #26

    AdeDunn

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    I've got mine wired up to my PID. I actually only use it during the mash as I don't need it during the boil. Works brilliantly, keeping power levels just right to maintain mash temps without scorching the wort.
     
  7. Feb 21, 2019 #27

    entertheflagon

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    Power ratings apart, check the construction and heatsinking.
    Just picked up some of these SSR's for less than a tenth of what I paid for a branded Croydon type from RS.And that with a PID controller thrown in!
    They look like toys in comparison so I'd be sure not to stress them.
    There is a screw thread protruding from their flimsy base that will stop proper heat sink contact and could be a common cause of failure. Lap it smooth with the base ( which is not a substantial copper slab like a good SSR) and use thermal grease.
    It looks like it's a single triac that does the business, not a pair of back to back thyristors I'd've expected.
    Use them, and I will, but I'd be putting nowhere near their rated current through them and be warned, they often fail as short circuit, I'll sort a safety cut out for my own use.
     
  8. Jun 2, 2019 #28

    James Read

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    Thanks Foxbat - built this yesterday and used on a brew. We also used it to control the water for Strike and Sparging - very handy!
    I'm no master electrian, but I found the instructions well laid out and easy to follow.
    I think the only issue was the cover to the power regulator wouldn't sit over the screws I used.
     
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  9. Jun 2, 2019 #29

    foxbat

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    Glad it worked for you. I use mine every brewday for the whole length of the boil.
     

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