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Ebay cheapy; http://www.ebay.nl/itm/K-Type-Thermocouple-Temperature-Sensor-Probe-Alligator-Clip-upto-500-C-2M-long-/301724236829?hash=item46402a7c1d:g:c5MAAOSwTapV3oTK

Ralph is 100% right, by defaults it's "internal" and set to "ET73 probe", you need to change this if you use a TC.

The weather was nice and I had some brined pork belly in the fridge waiting to be turned into bacon, so the ideal opportunity to play with my latest prototype! Results, HM modifications : back to the drawing board (ie. no improvement) Bacon : Not tasted yet but the smell was divine!:D

Although the noise levels of the of the V6.1 board are within the limits and don't cause any problems anymore, I still feel that they could be lower. One of the main causes for noise on the TC signal still is HF noise on the 3.3V power caused by the PWM of the fan output. I did some testing to...

I agree with Ralph, the OKI regulator would be the first thing to check. Just a question, what kind of solder are you using? Almost none of the joints have properly flowed. I would remove most of the solder of all the joints and re-solder them with a good quality solder or use some additional flux.

The color of the solder joints depends on the quality of soldering. A good joint should be shiny, when the joint is dull it means that the temp was too high or too low or that the heating time was either too long or too short. You can brush a dull joint all you want but it will never shine.

Post some high res pic's (in focus, after the cleaning) so we can help you trouble shoot. Ralph, please don't shout, ouch my ears........;)

What exactly where you measuring? Ohms, Volts, Amps, gravity?

I haven't seen any issues, but it's bad practice and I will rectify it in my next revision. But don't worry, your boards will work just fine.

Looks good but you haven't fixed the stupid f*ckup that I've made.:( The 0.1uF capacitor just below IC2 should be much closer to IC4, at this position it does nothing! That's what you get when you let the software do all the work.

There should be 2 soldermask files in the OSH park gerberfiles.

Smoking some baby back ribs, using the HM4.2.4 my son build for me. http://pietrmeter.asuscomm.com:9091

Maybe I don't understand the question, but adding TC support to a 4.2.4 board is as simple as soldering the SMD components to the top side of the board and replacing the pit jack for a TC connector.

Are you sure that the display isn't touching the RPI somewhere? Does the web interface work normally when the HM and RPI are connected? IE do all the probes work, can you switch the LEDs on and off, does the blower work? If the answer is yes then you know that the problem is not caused by the...

Should be fixed now! http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=27647396C3

Looks like you are right, I have deleted half the components somehow. Give me a few minutes to fix it.

Thomas, You can upload your photo's to something like photobucket and share the links to the photo's here. Double check the connections of the AD8495, check for short circuits but also for bad connections between the pins and the pads.

If the cost is $0,00 then I would like to buy a few as well, I pay you double the price, gives you a nice fat 100% profit!:)

The Mouser project for V6.1 :http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=27647396C3 Eagle and OSHPark gerber files :https://drive.google.com/open?id=0Bwa0lCCxzZ-3flVVVWFBU1hXcF9oRGJ5ZzFxV1AwSlFRdklVWVZKbV90U3Fhcld3T3FCakE STL files for the case ...

Glass and cheap hairspray does the trick for me, so much that I sometimes have problems removing the object after printing. The top is printed face down.