VMM

i'm looking forward to this. I think it's a great idea. I think just covering the basic stuff will take you some time. unused pin termination, clock selection, interrupt strategy. would also be nice to see the results. if you could put an o-scope on a shunt resistor it would be worth 1000 words.

looks nice! i like the choice of "launchpad red". wish i had a printer.

Well, it's up and running. All the hardware seems to check out. Display and accelerometer are playing nice on a shared spi bus. The FR5738 RTC is keeping time. LIS3DH initialized and generating interrupts properly. Lots of programming to do now for the interface, calibrations, etc.

Have you given any thought to using a simple compression scheme on the fonts? Not sure if they payoff would justify the effort and overhead, but these fonts do take a lot of space.

this is coming together nicely. cool project man! so, what's the deal with the current resistor anyhow? datasheet i got is super vague. i've just stuck with whatever was in the reference design, and adjusted in software. wonder if you could use a photodiode there to compensate for ambient light without processor intervention...

yeah, that may have been a better choice. i don't really need the adcs on the 3DH or the higher resolution. i may try to change it, but i had a hell of a time routing the traces for that.

i went with the LIS3DH. it has some neat features i wanted to play with. a lot of these accelerometers are mostly pin compatible though, so i may be able to use something else if i need to. i also decided to go with a FR5738 this time.

i've been working on this a bit more. i hope to build another one soon. in the mean time, here is a sneak peek:

neat! so this is just the oled panel without the 4d "goldelox" controller? i've got a 128-gmd1 that may use the same panel. surprised i haven't found a use for it yet, but here it sits.

cool. how about adding a usb-serial bridge for comms and programming via rickta59 bootloader? http://forum.43oh.com/topic/3661-1k-serial-gdb-bootloader/

rockets4kids is right. check out my robot that does just that: http://voodoomanmiracle.com/wp/?p=80

I found this page very helpful in understanding servo control: http://e2e.ti.com/group/microcontrollerprojects/m/msp430microcontrollerprojects/494158.aspx for my robot:

You're right about price. I don't really mind, though, as I don't plan to mass produce or anything. I think the piezo would require a lot more design considerations. It would also be larger. With the accelerometer, all the fine tuning can be done in software. I also had the idea to use it to log sleep patterns. Graphs could be shown right on the display in the morning. edit: I may be wrong about the piezo. Do you think the flexible film type could be adhered to the back of the display and function as described. It wont flex much behind the layers of glass.

Yeah. Something like that. Case design might actually be kinda tough. The buttons are the hard part. I'd also like to keep it as small as possible. Will need to brush up on my 3d modeling.

I got the display from gabotronics. I also got some blue ones from a shady chinese company, but they don't seem to work for this. There really isn't much of a case. I filled between the display and pcb with epoxy. Glued on the tips of some servo horns for watch band lugs. Made a back plate from some sculpey. It's actually holding up pretty well, but I'll probably get something better done on a rapid prototype machine at some point.