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I have some of the thermocouple boards that were at one time meant to be added on to the 4.1.2 ? boards, that I worked on with Bryan. I can send you a couple if that will help, call it a breakout board for the AD8495 with screw terminal and/or the proper themocouple jack. By removing the pull-up...

Yes the fit is made to be very tight so that a good connection is made. Any resistance at the junction will make the reading inaccurate.

I vote yes for adc vref being 1.1

The thermocouple add on is a work in progress.

Might be of interest......... http://www.ebay.com/itm/204-20X4-20-4-2004-Character-LCD-Module-Display-LCM-Compatible-HD44780-/200841346835?pt=LH_DefaultDomain_0&hash=item2ec313bf13

Is LED 1 Lit?? Is D3 installed the correct way. Take pictures of the front and back of the board and upload them so people can have a look.

You need to order a case for a 4 line display. You can use small gauge wire, or ribbon cable. Something as simple as the wires from an old floppy drive

If you have the time,,, Wait for 4.2 it should be available soon and will support a K Thermo Couple for the pit temp.

Any HD44780 compatible display will work. 4X20 displays need to be wired to the board. There is a thread here somewhere search for Newhaven Display.

If the above does not work try this... If you can see the text when held at an angle it is probably a contrast issue. If you have a voltmeter you can check the center pin of the trimpot to ground if you turn it one way the voltage should go down, if you turn it the other way the voltage should...

If height allows install a socket for the 74HC595

It is for the LCD and LED's 2 and 3.

I was going to use the fan with a DC-DC ssr to boost the power needed, but as usual I am over-building. My though was a 10 cfm fan is used and my smoker is 10 times bigger than a WSM so 100 cfm sounded good at the time. What do you think would be a good size fan for my smoker, 30 to 50 cfm?

Since the fan is pwm controlled it is better to have more power available than be under powered. my smoker is a reverse flow 6 feet long 24 inch diameter. not sure how much flow I will need so I am thinking big. for the price I can't go wrong. If I get bored maybe I can make the smoker fly...

Thanks Ralph I have this type in mind.. http://www.ebay.com/itm/Boat-Engine-In-line-Blower-12v-3-Bilge-/350980506972?pt=Boat_Parts_Accessories_Gear&hash=item51b811855c&vxp=mtr

I am in need of a Damper for a higher CFM fan maybe 30 to 60 CFM. I have a reverse flow smoker and the stock fan for the HeaterMeter will not be large enough? Are any of the designs able to accept a larger fan?

They are cool Here is another option, this one goes straight in.... http://www.mcmelectronics.com/product/83-14394

The temperature compensation is needed at the junction where the metal changes to copper on the board, this is called cold junction compensation. The chip AD8495 is located right next to the + / - terminals on the pcb with .250 inches or so, The temperature of the terminals and the chip will be...

I have a board on the way.... Thank you for all of the offers.

Myself and Bryan are working hard on trying to come up with a solution...