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From reading the Jason Perrault presentation (link B-Hoppy gave - http://www.uvm.edu/extension/cropsoil/wp-content/uploads/jason-perrault-transcript.pdf) it seems clear that the cutting back has 2 primary reasons. First is to control growth. From his explanation you are actually bleeding off the...

I got that patent infringement cease-and-desist letter no one wants to receive. I complied. I actually requested the Forum Admin take down this thread. Sorry. For the record, I suggest that anyone interested try to lobby the Coolbot folks to pick up on this idea and offer a "Coolbot Light" -...

If you have any questions contact me directly - my email addr is at the bottom of the parts list on my web site: http://people.umass.edu/~dac/projects/ColdSnap/ReferenceDocs/ColdSnap%20parts%20list.pdf I don't think the epoxy should be an issue. The temperatures are changing slowly enough...

Too many people fret over knowing the AAs of hops. With homegrown Chinook or Nugget, you can assume something north of 10% AA for a guess if they ripened fully and you see nice lupulin at the base of the bracts - you'll get a sense if you pack the dried cones into bags tightly - your hands will...

My personal experience is that some do better than others - depends on your local conditions and disease potential - along with what you are willing to do treating them. I'm unwilling to use any pesticides or fungicides. I am in western Massachusetts, in some hills just east of Amherst, about...

You can use off the shelf thermistors but you will need to calibrate them and find the A/D counts for the important temperatures and then enter them in the code - the code as I published it sends the A/D counts for the 2 probes to the serial port so you can use the ColdSnap to do the...

Sorry, there is no easy kit - yet. I am working on a PCB that will eliminate the tedious hand wiring and so one only has to solder a few components and the Arduino Pro Mini board to the PCB, add the sensors and AC probe heater, download the code to the Arduino. The PCB is in an early stage and I...

Sure, you could use a relay. I'm attaching a design that would replace the resistor on D10 of the Arduino (but could be any digital logic output. Note that this drives a small relay (available from Digikey or Newark) that requires only about 17mA to operate and can drive 3A/120VAC. This will not...

I don't think you need to heat the whole capillary tube. I think only the bulb needs to be heated; the capillary tube is relatively low volume and rigid so most of the expansion of the internal liquid is happening in the larger volume of the bulb at the end. I think it would work about the same...

--------------------------------------------------------- I guess I have to say that I don't know the fine nuances of open source and public domain. I developed the project myself and made the schematics and code available for people to use in any way they see fit. My intention is that people...

I just saw this and am jumping into the middle of the thread, but just wanted to thank the OP and contributors for this great stuff! Thanks all!

Sorry, I can't build them for people; among other things it could violate a patent - not really sure of the status of that patent application, but not interested in taking that on in that way. I posted this as a DIY project as an "end run" around the patent issue. I have answered some questions...

Yeah, the chip thermistors are tiny. I build them under a magnifier. I used to do a lot with micro-dissections and such before retirement so it is familiar work. I had a look at the part you referenced: * The linked probe has the same B-value as the one I specified (for B25-85) so it is...

Hi all - Sorry - was distracted making fall brews and reworking my wood furnace controller with another Arduino Pro-Mini :) I recently helped someone who had contacted me to get his ColdSnap unit going. He built it exactly like the description, but set it up for 39F and a couple of degrees...

I've read that the aroma compounds are more evident late and I've found that to be true. Initially the lupulin will be a pale color and will become darker yellow when they are really ripe, but you should peek under the bracts from time to time so you know the difference and can monitor the...

351.65 + 33.5 oz Nugget + 28 oz Cascade + 37 oz Chinook (all dry) = 450.15 total

I'm with Nostrildamus on this one. A fan on high is probably required because of the inefficiency of the loaded and stacked filter arrangement; all of the filter fibers and the hop cones in between greatly impede the air flow. This is really a very inefficient arrangement for drying; the...

The ColdSnap units are working very well. They aren't flashy but just get the job done. There is one in use near Pittsburg (a forum member) cooling a beer cave cellar. I don't have temperature records, but he sent a picture of a thermometer in a glass of water and the temperature was spot-on...

Your problem with measurement is that you don't know the %water in the freshly picked hop. If they are more dry than 80%water, then they will reduce less when 10%water when properly dry (example; 8-12% is good). The better way to know the moisture content for storage does not require the...

If you are inclined to use a window air conditioner and something like the CoolBot, you might want to look at the project I have recently posted, a very inexpensive open source scheme for a "Non-Contact Air Conditioner Override Controller", (NCACOC ?) but that's not very memorable, so I'm...