DNA Development Blog

[Curt]

reflow oven is functionally complete and I have a basically good enough control-algorithm to hold temperature within a degree or two C, not a huge issue since most of the time it is going to be heating up or cooling down, not holding, but nice to have, and groovy technical challenge.. when coming up to temperature that sucker has crazy overshoot, I have to kill the power 20 degrees ahead of setpoint and start varying duty cycle to hold!

The initial run of OLED and Button boards should be en-route from the manufacturer now, and I just completed a massive Mouser order for all the parts needed to complete them, I have 30 OLED modules ready to go, and 13 of them are already purchased for the class. would be nice if they could DISPLAY something.. I can graphically address the pixels, frame buffer, refresh, all the groundwork and drivers are written, next step is to translate a few fonts, load them into the EEPROM and start writing text to the screen, I envision a few modes:

for putting specific characters on the screen anywhere, in any font:
characterAt( character, x, y, font )

and for whole strings which are stored in EEPROM:
stringAt( stringOffsetInEEPROM, x, y, font )

That way a sizebale string table can be loaded into the 64K of eeprom for ease of creating menus and stuff without having to pack it all into the MCU Flash, which would be awfully wasteful.

Oh so the serial RAM is 8k but I only need 512bytes of it. .... any ideas what to do with the other 7.5k? I have an idea... if you have an OLED board... it stores all your shot timings for replay

Replay? oh I have some ideas that are gonna knock you out, no spoilers, but when you see what I have planned.. muahahahaha...

[neftaly]

The brand new "Ice Cube" system, which vents gas directly from a siphon tank? I think Tippmann beat you to that by a few years

[2xFast]

...I know. Drafting standards, too many/too few behind the decimal...blah, blah, blah

.dxf and .tiff's here:

https://docs.google.com/file/d/0BwXW...it?usp=sharing

[2xFast]

....inches. mm's are not welcome where I'm from.

[skibbo]

Looks nice. Looking at it again I'm pretty sure that I forgot to include one of the parts. I think it was the Attiny45 that goes on the back of the button board so the thickness on that one isn't right.

Like I said before, unless Curt verifies the dimensions they're educated guesses from me. I took the picture he posted and scaled it down based on the size of one of the solder pads. So I have no idea how close anything is on the button/OLED boards. However, the DNA board is right since Curt had posted the dimensions so that made it much easier.

...I know. Drafting standards, too many/too few behind the decimal...blah, blah, blah

.dxf and .tiff's here:

https://docs.google.com/file/d/0BwXW...it?usp=sharing

[Curt]

WOW great stuff! Not.. quite right though.. here are brd files you can use with Eagle CAD to get the exact dimentions

http://northarc.com/dna/button_dim.brd
http://northarc.com/dna/oled_dim.brd

and here are some screen grabs for top/bottom texture.




also component-wise.. those tactile switches are a bit thick for me, I cam currently favoring the much thinner panasonic device:
http://www.mouser.com/Search/Product...667-EVQ-Q2S01W

but have some other possibilities on order to see which one I like best, or if you have one you want to see! I am totally open


http://www.mouser.com/Search/Product...653-B3SN-3012P
http://www.mouser.com/Search/Product...11-KMT211NGLFS
http://www.mouser.com/Search/Product...688-SKHUAME010
http://www.mouser.com/Search/Product...667-EVQ-Q2Y01W
http://www.mouser.com/Search/Product...611-KSEM31JLFS
http://www.mouser.com/Search/Product...667-EVQ-Q2S01W

[Curt]

Also small side-note, the attiny45 does not come in a small enough package, I am using the ATTiny25 for the button board, which is still way more than enough horsepower, and a few pennies less to boot

[skibbo]

thanks for the info Curt. I'll get the boards updated within a day or two and repost the files.

[Curt]

thanks! Also could I get some top/bottom/iso(top/bottom) wire-frame views please?

[skibbo]

Shouldn't be an issue. I'm pretty sure Inventor can do that without a problem.

thanks! Also could I get some top/bottom/iso(top/bottom) wire-frame views please?