Well, I got all of the recent orders in today and the four W1209 boards (+ two more W1219s) are all genuine this time! So, after two weeks of trying I finally found legit suppliers! Man that game was getting old... I'm glad that crap is behind us now.
I really like these W1209s a lot! I've found a new thrill! LOL
They're small (44mm x 40mm), roomy, very well laid out boards and are much quicker & easier to operate than the W1219s are. The hardware, features and firmware are identical in both models, but these W1209s are a better implementation all around. I like the buttons layout the most on these... there is more space between the display and buttons and they are centered under the display which would make it easier to add a weatherproof strip of silicone buttons to an enclosure for these W1209 boards.
The mouser order arrived today too, as well as the two donor sensors that @shadetree
donated to our project! Thanks again shadetree!
So, this weekend I'll be testing thermistors and trimming the pullup voltage on the boards until they're linear and accurate on the stovetop. Then I'll pot the new precision thermistors into the donor sensor bodies and verify those on the stovetop.
Next stage will be housings/mounting options to be hammered out. We can/probably should build this gizmo out using two separate enclosures. I found a small enclosure candidate (thin, pocket-size, about the size of a large key fob) that might be suitable for handlebar mounting the W1209 if ya want that option? A similar, larger enclosure might be fashioned if you prefer the W1219 board.
My idea for that so far consists of buying two tiny enclosures that I found online and then rob the silicone buttons from one enclosure (that one is too small to use, but has some real nice buttons!) to install into the other tiny enclosure.... I'd make a window for the display and a capillary for the LED... the board inside would be stripped down to about 12mm thickness. A china handlebar clamp from ebay could be used to mount it on the handlebar somewhere. Five 18 AWG or smaller wires would exit that tiny enclosure and connect into a 2nd, larger weatherproof enclosure mounted out of sight somewhere under the front fender. The 2nd enclosure would contain the voltage regulator & supporting discretes, the two relays, etc. on a perf board. Each enclosure + the sensor would have weatherproof plugs soldered into the ends of their wiring for ease of installation. In my mind this all seems easy and clean, but it will take a bit of fussing and time to complete. I'm all ears... this might be a great time to finalize our decisions.
Here are some pics of the W1209. The 1st pic shows LLL on the display cause the sensor is disconnected. Thats one of the more important features we wanted, right there. :-) Next pic shows the size difference between the single display W1209 and the dual-display W1219. Third pic shows the red LED turned on which indicates that the fan relay is triggered.
If you'd like @wheelsquad
I can send ya a couple of these boards, so that you can compare them yourself before we decide on the final product?