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Old 19-12-2011, 15:59   #1
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Needed: Photo of the "other side" of a Merlin, mini smart speed controller

I'm in the middle of a refrigerator build and want to install a smart thermostat.
The Frigoboat Smart Speed Control is no longer available, and this is on my list of possibilites:

Coastal Climate Control: Guardian, compressor speed control and digital thermostat

There is a "Merlin" automatic speed controller board which can be added, but by the looks of the backside of the board, it looks like a simple circuit I could build myself, saving some significant bucks.

Does anyone have one of these and if so, would you be kind enough to post a pic of the other side of the board?

Alternatively, comments or recommendations for other automatic speed thermostats would be welcomed.

Thanks !
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Old 19-01-2014, 07:46   #2
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Re: Needed: Photo of the "other side" of a Merlin, mini smart speed controller

Just thought I would resurrect this thread and also ask what the difference is between this and the the Danfoss AEO module is.

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Old 19-01-2014, 13:43   #3
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Re: Needed: Photo of the "other side" of a Merlin, mini smart speed controller

I purchased the circuit board soon after that post, even though it felt like a big bite for such a small board.

After receiving it, i noticed that it's got lots of "stuff" on it.
In other words, it's worth the price and does a great job of controlling the box.

I don't know what's on the AEO board.
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Old 19-01-2014, 14:09   #4
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Re: Needed: Photo of the "other side" of a Merlin, mini smart speed controller

Im pretty sure that the AEO module does the same thing as the Merlin, just the Danfoss version. One thing I like about the Merlin is if it craps out , you can just yank it out and go back to the normal Danfoss controller. Apparently the AEO is a completely integrated solution that has it own on board fan as well. If it gives up on you, you will have to replace the complete control module .
Thats my take on it.

How long have you had the Merlin ? Any problems?

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Old 19-01-2014, 15:43   #5
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Re: Needed: Photo of the "other side" of a Merlin, mini smart speed controller

About two years. No problem at all.


GO SEAHAWKS !!!
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