Who is interested in Custom Temp. Controllers?

Post by **chalmers** » Wed Mar 09, 2011 8:50 pm

Great news! Looking forward to trying one.
Will we need anything else to make these guys work? Thermal probe, etc?

Garak · Post by **Garak** » Wed Mar 09, 2011 10:07 pm

I wired one up this afternoon and found a well written library that uses the preprocessor properly so it can be used on just about any hardware configuration. Every pin is definable so I can work around the atmega's dedicated hardware pins. http://homepage.hispeed.ch/peterfleury/ ... tware.html

The board layout is getting more complicated by the day. I'm starting to think I should design a proper board and get it manufactured in china. The proto boards I just got are a bitch to solder as they have extra pads for surface mount components in between the pins and I keep getting solder bridges to them. To make things worse my solder sucker is MIA, so I'm having to use wire as makeshift desoldering braid.

I'm going to keep building them on proto board for now as I'm still nailing down the design. Anyone who gets one of these boards can trade it in for a proper board down the road. Same goes for firmware, as it improves I'll update controllers for free.

moxie · Post by **moxie** » Wed Mar 09, 2011 11:26 pm

So wait a minute... This can just be flashed with new firmware when needed?? That is awesome.

Garak · Post by **Garak** » Thu Mar 10, 2011 12:27 am

Yea you just need a $15 programmer to write the firmware into flash. Eventually I could just install a boot loader which would allow for easier firmware updates over usb, but the usb serial board cost the same as the programmer.

Jmac00 · Post by **Jmac00** » Thu Mar 10, 2011 12:47 am

what type of programmer do they need?

Garak · Post by **Garak** » Thu Mar 10, 2011 2:07 am

I use an USBtiny AVR programmer similar to this one: http://www.sparkfun.com/products/9825

I have ladyada's version that I built from a kit a few years ago.

Jmac00 · Post by **Jmac00** » Thu Mar 10, 2011 8:43 am

sheesh....atmegas and AVR's...been a while since i heard them names...

That programmer looks similar to an older atmega card i had.

Seanstoppable · Post by **Seanstoppable** » Thu Mar 10, 2011 9:17 am

Garak wrote: To make things worse my solder sucker is MIA, so I'm having to use wire as makeshift desoldering braid.

If it is MIA for too long let me know. I have an extra solder sucker around my place.

ratchet · Post by **ratchet** » Thu Mar 10, 2011 12:07 pm

just a FYI: If you're in need of some surface-mount stuff... we're getting a hot-air re-work here within the month.

Garak · Post by **Garak** » Thu Mar 10, 2011 3:10 pm

chalmers wrote:Great news! Looking forward to trying one.
Will we need anything else to make these guys work? Thermal probe, etc?

The current temperature sensors are LM35, they look like transistors. They are really only suited for dry use, like controlling a freezer.

I'm working on a way to seal them into some copper or stainless tubing so they can be submerged in liquid. For non-food grade applications I've sealed them in epoxy with good results.

Chalmers, What was your application exactly?

Post by **chalmers** » Thu Mar 10, 2011 5:04 pm

Garak wrote: Chalmers, What was your application exactly?

For right now, kegerator/fermentation chamber temp control. In the future, HLT, MT, etc.

Post by **mr x** » Sat Mar 12, 2011 12:06 pm

Hey Garak, do you know where to get nice project boxes, like these:

http://www.auberins.com/index.php?main_ ... 26c5216c7f

I'm interested in fermentation temperature controllers, like maybe one box with two outputs to control two carboys.

ratchet · Post by **ratchet** » Mon Mar 14, 2011 8:30 am

@ X:
Can't you just buy those product boxes from the company you linked to?

Post by **mr x** » Wed Mar 16, 2011 12:11 am

Believe it or not, no. Not the larger ones anyway. Just looking for a source inside Canada.

Who is interested in Custom Temp. Controllers?

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