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  1. C

    PID settings on arduino based hlt

    Edited per the post below. Thanks for the tip! #include <PID_v1.h> #include <PID_AutoTune_v0.h> #include <OneWire.h> int DS18S20_Pin = 8; //DS18S20 Signal pin on digital 8 //Temperature chip i/o OneWire ds(DS18S20_Pin); // on digital pin 8 #define RelayPin 3 int relayPin = 3; int...
  2. C

    sous vide

    I just ate some lamb. Two days at 135 to test a new arduino project. I bought one of those pre-marinated butterflied pieces, and never even took it out of the commercial package. Straight from the grocery bag into to water. I'm trying to attach a picture, but I'm not too familiar with this...
  3. C

    PID settings on arduino based hlt

    Oh... if this is obvious, forgive me for bringing it up. Watch that last line just before void setup(), it will run a simulation until you change that value to false.
  4. C

    PID settings on arduino based hlt

    FOREVER! Or so it seems. Maybe 6 heat/cool cycles? In my crockpot, that must have been a couple of hours or so. I watched Hudson Hawk while it ran.
  5. C

    PID settings on arduino based hlt

    I'm pretty sure I do. It's the same as what's right there on the site, though, with two minor exceptions. - I added what I needed to get a Fahrenheit setpoint and readout in the serial monitor from a DS18B20 - I did a cut & paste swap of the part from the 'to control a relay' example, also...
  6. C

    Question for Yuri & other Arduino users

    Thanks for the link. I actually read that a few weeks ago, but comprehended none of it. Now looking it over again (with a few weeks under my belt), it all makes perfect sense and describes pretty much *exactly* what I'm talking about.
  7. C

    PID settings on arduino based hlt

    I haven't gotten to the HLT part yet, but I've got an Arduino controlled crockpot going here. I used this library to determine the correct p, i, & d.
  8. C

    Question for Yuri & other Arduino users

    Question for those of you that are really experienced w/ Arduino. I just bought an UNO about 4-5 weeks ago, and have been teaching myself the code and the circuitry. The last time I wrote code, it was in “Clipper” for dBase III+ (read: a long time ago). I’ve got the thing reading a...
  9. C

    Etching PWM board - second attempt

    I've got two ideas for next time. a) see if acetone will dissolve the toner w/o any abrasiveness at all. b) I'm thinking about drawing all of the pads all 0.09" in diameter, with a 0.07" hole. The toner will draw tiny, thin rings for all of the pads. Then I'll "darken in the dots" with the...
  10. C

    Etching PWM board - second attempt

    The Sharpie works GREAT! And... it wipes RIGHT OFF with some rubbing alcohol. The toner, however, is harder to remove. I used a scothbright pad to scour it off, but it scuffs up all of the traces very badly. I checked them all for continuity with a meter... but they're still all scratched...
  11. C

    Etching PWM board - second attempt

    Further along: Done, rinsed, and dried:
  12. C

    Etching PWM board - second attempt

    Then into the etching solution. This is supposed to be some pretty nasty stuff. It's viscous, and it takes about 10 minutes or so to etch all of the exposed copper off the board. You can see here where it turned the copper some gross color as it eats it:
  13. C

    Etching PWM board - second attempt

    I also wanted to give the Sharpie a try, per the recommendation from several of you here on the board.
  14. C

    Etching PWM board - second attempt

    Water softens the paper: and it peels right off from the toner:
  15. C

    Etching PWM board - second attempt

    I finally got the little back project box in from Hong Kong so I made another attempt at etching this PWM board. I printed the circuit out on a page from the Northern Brewer catalog: Then I ironed it to just-cleaned piece of copper clad PCB. I first ironed the PCB itself, with a sheet of...
  16. C

    sous vide

    A decent explanation: http://www.seriouseats.com/2010/03/how-to-sous-vide-steak.html
  17. C

    sous vide

    Normally, you apply 80 million degrees of heat from the outside, when the middle of the steak hits 134, it's "cooked". The outside of the meat is more done than center. In sous vide, you dunk the meat (in a bag) in 134 degree water. It takes forever (relative to flame cooking) but eventually...
  18. C

    sous vide

    Yup, I've done it a bunch and will continue to do so. It works like just like you think it would. It just... works. I bought an entire slab of prime rib and had him cut it into steaks. I vacuum packed the steaks individually with a LITTLE montreal seasoning (use less than you normally would...
  19. C

    Etching a circuit board from scratch

    For you guys suggesting Sharpies, do you mean to use it for the UV exposure, photo resist? I'm just transferring toner off of a page from a Northern Brewer catalog, then etching. Does the Sharpie resist the actual ferric chloride (? I forget the name, I'm not at home) etch solution?
  20. C

    My corny spunding valve build

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