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I think I answered my own question...my first search for an HC returned zero results, but this time I got http://www.mouser.com/ProductD...6P5FpFD8uMCtItXCw%3d

Did you really mean to pick a $10 part though? http://www.mouser.com/ProductD...5VBmSUJE%252bQ%3d%3d

Dave, If your not in a huge hurry some of the Chinese board houses are a lot cheaper. There are guides online on converting the eagle files to standard board packages and you can order 10 boards for ~$20. I don't have them here at work, but there are two companies that are widely used in the...

Sounds good - I am probably going to try and add my switching circuit to the same board/schematic and put it on order later this week. From what I can find from the often used cheap board houses, there is no price difference between a 10x10 and a 10x5, so I have a lot of real estate to play...

I just got a chance to look at your V3 board/schematic...Looks good. I actually don't even need to keep a second "barebones" as a reference now, just don't populate anything in the boxes Do you have any concerns you still working on with it or do you think they are close enough to pull the...

Oof don't build this! There are two big problems with it. #1 (the fatal flaw) is that the pullups on the analog ports for the probes should be attached to 5V not GND like they are in there. The 1k on the button board still is supposed to go to ground. Check the schematic that is in git to...

Finally found a good chip to use for my expander setup and I have a buddy that is going to look at extending the OpenWRT code to handle two serial inputs, so here is what I think I am going to build. 1 - Standard Linkmeter board 1 - Barebones Board 1 - Switchboard This way I can use a single...

Good news Bryan -- I spent the better part of the morning yesterday reading about bootloaders, but convinced myself that wasn't your problem since I couldn't find any offensive watchdog references in your code...wish I had at least tossed out the idea sooner, but glad your back on the right path.

Bryan if you want another set of eyes on the issue I would be glad to paypal you the cost of a bare board and shipping and I will populate it and T/S as well. I just got my first Uno in, so I can at least do some comparisons between the two. I won't claim to be an arduino expert, but I did...

According to my friends I tend to get carried away on projects quite regularly, so I guess it was bound to happen I am actually one of those crazy people that would much prefer to build with all smt, but probably because that's what I have a lot more experience with and I have a Metcal at home...

Well, I can't PM on this board, so here you go - I figured you had your reasons, and that's a very valid one. Additionally, as far as multiplexing the PWM outputs I think the cleanest way is again the addition of some hardware. A TLC5940 can be bought from SparkFun and is a fairly easy way to...

I will have to look at your code to ensure that I am understanding your implementation correctly, but the only addition would be to use a timer circuit that is pulsed by your reset_not line. That will make it so that the reset pin is pulled low for a set amount of time. The concern that I read...

That all makes sense Bryan, thanks. I was really thinking this might have to turn into a new "trunk" as it is somewhat of a specialized setup, but after reading your explanation I might have to abandon the software side of this as it sounds much more involved than my meager coding skills might...

I am very new to this project, but before I ask my questions I thought I would see if I can help with yours...If you haven't fixed the problem already, I would pull D4 or R22 and see if it isn't your soft reset circuit preventing things from booting correctly. Now, to my questions. I have...