DIY DIY Peltier Res Cooler

[TxOld Dude]

The unit works great! And for 12-15 bucks too! RE: instructions. No, not really. They were very weird but I found some stuff online in the Amazon review section. A previous buyer detailed it out to make it easier on the rest of us! I'd read it before I purchased.

 

[Feenix]

The unit works great! And for 12-15 bucks too! RE: instructions. No, not really. They were very weird but I found some stuff online in the Amazon review section. A previous buyer detailed it out to make it easier on the rest of us! I'd read it before I purchased.

Yup, I found that too. For the price its unbelievably accurate. Constantly chilling air, I need a lot colder water than chilling water so I freeze the core of an altered dehumidifier with the sensor just touching the top of the fins. As the ice swells it touches the probe and turns off the unit until the ice recedes from contact turning it on with the slight difference. It never totally thaws but doesn't run all day. I'm still experimenting with fine tuning it to allow the thaw to 3/4 of the core depth before restart to save even more cash. It seems easy enough with the feature that allows it to read liquid temp. by the outside temp. of the container wall. Just about got it but its a tedious process of hit and miss to get it exact. A science guy would just run a calculation and nail it but that is not in my background. Months and I'm still at it. I gotta walk away often to rethink it. The differences are so slight.
:Sharing One:

 

[TxOld Dude]

yeah I saw the peltier under, was not sure if I missed something yesterday because i was using the smart phone app (pain)

but I really like this idea TxOld Dude and your :Cool bud: design and clean finish !

going to be watching you closely because for the first time in YEARS I have to have the res. inside the cabinet I am growing in so I am very likely going to be doing something like this, wondering if I can incorporate this into my dwc tote because I will be running two totes with different nutrition levels

You could integrate but the roots will get into it. Make sure your intake is well screened, but yeah, it can work.

 

[Feenix]

You could integrate but the roots will get into it. Make sure your intake is well screened, but yeah, it can work.

I'm cooling a cabinet with very hot lights. A version of the bucket ac with a coil instead of ice. The core chilled water feeds the coil and returns with a pump similar to yours.


When I get to DWC it will chill res's like your set up. Using the cooling blocks..

My setup is overkill but I tried a peltier from a Coleman cooler and it wasn't enough for the lights..

 

[TxOld Dude]

Take a look at this. http://www.novatecproducts.com/iceprobe.htm I am using it installed through the wall of a 25qt cooler to keep about 4 gal of liquid at 65F. It's pricey but I started to build a unit with the same parts you've ordered TxOld Dude and I just envisioned water leaking out of every connection. Also if you look on AliExpress there are units already constructed for sale. I subbed.

I just realized after relooking that the ice probe is just a peltier with a specialized housing (the "probe" end).

 

[pop22]

I absolutely love this tech! I thought about trying one myself, but I'm moving away ( mostly ) from DWC. As much as I like tech, all this for me is too much complication and expense and I've gone the reverse route to dead simple organics. I've giien decent results with my Kratky experiment, but a bucket of soil and some water are all I need. Of course, I'm likely to do another complete reverse at any time....lol!

How are your plants doing in this setup?

:Sharing One:

 

[TxOld Dude]

Hey Pop! I got the thread back up in the hydro section. The link in my signature to the grow is now fixed.

Check it out!

 

[TxOld Dude]

****NOTE****

Just a note folks and a bit of disclaimer. This peltier chip is too small for applications using HID lighting and black plastic containers. The amounts of heat absorbed is more than one chip or a single chip this size, can handle. A larger size or a parallel array will be needed.