I'm surprised more people aren't using something like this for their stir plates...

http://www.newegg.com/Product/Product.aspx?Item=N82E16811995073



Seems like the simplest and easiest way to have complete control over the full range, including lower end.

At least, I'd imagine the controller gives you complete range control - unlike a 25ohm pot setup.

lol i am.. i got the idea from wierdbeer he made a video and posted it on this site few months ago.. you can get em from ebay for like 3 bucks shipped.

Honestly, if I had it to build all over again I would probably use one of these : http://www.amazon.com/LEDwholesalers-Dimming-Controller-LED-Lights/dp/B003L4KKF2/ref=sr_1_1?ie=UTF8&qid=1348852396&sr=8-1&keywords=pulse+width+modulator

I have two of them in my control panel for manual control of the SSRs, they work great. But my mine is built with a pot and works fine too.

tjpfeister said:

Honestly, if I had it to build all over again I would probably use one of these : http://www.amazon.com/LEDwholesalers-Dimming-Controller-LED-Lights/dp/B003L4KKF2/ref=sr_1_1?ie=UTF8&qid=1348852396&sr=8-1&keywords=pulse+width+modulator

I have two of them in my control panel for manual control of the SSRs, they work great. But my mine is built with a pot and works fine too.

Click to expand...

That's nice. Comes right out of the case. Perfect. I hate not having the lower range of the fan.

tjpfeister said:

Honestly, if I had it to build all over again I would probably use one of these : http://www.amazon.com/LEDwholesalers-Dimming-Controller-LED-Lights/dp/B003L4KKF2/ref=sr_1_1?ie=UTF8&qid=1348852396&sr=8-1&keywords=pulse+width+modulator

I have two of them in my control panel for manual control of the SSRs, they work great. But my mine is built with a pot and works fine too.

Click to expand...

I just ordered it. Mine is already built with a pot too, but if this bench tests as well as I hope, it shouldn't be too much effort to switch out my pot for this one, and just mount the controller board to the inside of the project box - the rest of the wiring will stay the same anyway. Thanks.

J187 said:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811995073

Seems like the simplest and easiest way to have complete control over the full range, including lower end.

At least, I'd imagine the controller gives you complete range control - unlike a 25ohm pot setup.

Click to expand...

Nice, but that costs more than I spent for my entire build!

kh54s10 said:

Nice, but that costs more than I spent for my entire build!

Click to expand...

And you have full range control? Or simple 25ohm Rheostat control?

The Amazon PWM controller works great, much better than a simple potentiometer.

J187 said:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811995073

Seems like the simplest and easiest way to have complete control over the full range, including lower end.

Click to expand...

I'm surprised more people aren't using something like this for their stir plates...

Click to expand...

You can buy a fan with speed control from Amazon, and the speed pot can be relocated without any problems..
Available in two sizes, 80 & 120 mm.

I got the idea for the stir plate fan from this post

https://www.homebrewtalk.com/f51/yadiy-stir-plate-thread-279569/

Fan in action





Under construction video



Cheers,
ClaudiusB

ClaudiusB said:

You can buy a fan with speed control from Amazon, and the speed pot can be relocated without any problems..
Available in two sizes, 80 & 120 mm.

I got the idea for the stir plate fan from this post

https://www.homebrewtalk.com/f51/yadiy-stir-plate-thread-279569/

Fan in action

Under construction video



Cheers,
ClaudiusB

Click to expand...

What have you got going on there? Stirplate, built into the floor of tiny, tiny fridge for temp control, and forced filtered fresh air into the headspace?

chuckjaxfl said:

What have you got going on there? Stirplate, built into the floor of tiny, tiny fridge for temp control, and forced filtered fresh air into the headspace?

Click to expand...

You got it
I made one with a TEC (peltier) and the fridges always win.

Construction pictures

This works EXCELLENT! Super easy to wire in and controls the full range.


http://www.amazon.com/dp/B003L4KKF2/?tag=skimlinks_replacement-20

Took about 3 minutes to swap out my potentiometer for this and I feel much better having such good control.

You have a build thread on your tiny frig? I'm interested in how you have that setup and your plug setup for your temp probe.
Nice job.