Homemade Stirplate

I have been wanting to build my own stirplate for yeast starters for some time now and have been sitting on the parts for far too long! With the help of my good friend Tim Grubb of http://www.sizeoflife.com/blog/ fame, I finally got it done.

Parts:

I used a Netgear router adapter (output 7.5 volt) as my power supply, however any adapter within the 5-12 volt range should be sufficient.

4 inch computer fan.

Hard drive magnets. I only used one. You can also buy rare earth magnets online from a number of places, including Radio Shack (or “The Shack” as it’s now called).

2″ diameter steel washer

Approximately 1′ each of black and red wire

From Radio Shack, you’ll need the following:

7″ x 5″ x 3″ Project Enclosure: Part Number 270-1807

25 ohm 3 watt Rheostat (aka Potentiometer): Part number 271-265

12 Volt DC/30Amp Rocker Switch with LED – Part Number 275-018

Silver Tone Knob – Part Number 274-424

Not handy with a soldering gun?:

3/16″ Fully Insulated Quick Disconnects (16-Pack) – Part Number 64-3134

I have to give credit where credit is due so here is the link to the build steps posted over at http://tinyurl.com/yjjdjx3

Thanks to Anthony Lopez for the post and Tim Grubb for the build assist, I can’t thank you both enough!

Any questions about the build please let me know!

2 Responses to “Homemade Stirplate”

  • Hello Cat says:

    Came across this design quite a few times, and all of them seemed to incorporate the switch on/off mechanism. does the switch act as some kind of resistor? What would be the mistake in not using a switch and just rigging up the fan and rheostat to the wall wort (12vdc)?

  • Brad says:

    Hello Cat!

    The only advantage the switch has is so you don’t have to plug/unplug it in all the time in order to operate it. You should have no problems rigging up straight to the wall wort.

    Cheers!
    Brad

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