StickOS

[ScaleRobotics]

And I went by the datasheet VS the Sparkfun schematic for the VUSB connection (pin #35) to the cap. It's not crystal-clear what they're doing with this pin. It shows ---> with 3.3V just below it. Not sure if they didn't connect this pin or if they ran it to the other 3.3V connections with --->3.3V?

It wasn't clear at all to me. I located the source files of the CUI32. Here is a view of how they really have it connected... Following the datasheet sounds like a good idea.

I looked over the obvious on your pcb, and I can't find any mistakes. Pin6 of the programming header doesn't go anywhere, but you probably knew that.

Thanks,

Walter

[Bruce]

Thanks Walter. I'm guessing they have the internal Vreg disable, so I changed it.

This is the final version unless someone notices something wrong. It has a lot of spacing changes, copper pour islands removed, and has passed DRC.

I'm attaching the BOM, Gerber files, and the final CAD file so anyone can get quotes on boards & component prices if they like, or modify the original design as needed.

I have a bunch of parts on-hand like resistors, caps, /MCLR diode, etc, and some female headers if people want to use them for the analog pins - so it will save everyone a few bucks. See the notes in the BOM for whatever I have a ton of in stock already.

For a few parts I've included part #s for Mouser & DigiKey, but everyone's welcome to lookup cheaper parts if they can find them.

Ioannis,

Thanks, but my pick & place machine is a pair of SMD tweezers.. That's why I didn't want to go with any parts smaller than 0805 since I'll be placing them all by hand.

As for the through-hole parts, I don't mind installing the 2 switches, but the headers I'm going to leave to everyone else to install themselves.

Note: A few manufacturers from China have contacted me asking to quote on PCBs and full assembly of these, so I have attached pretty much all files they'll need to do so. You can contact me directly if you're interested.

[Ioannis]

Thanks, but my pick & place machine is a pair of SMD tweezers..

Ooh, I see. I thought you had the magic machine...

In that case why not send the parts and PCB to assemble it? It will save your valuable time. I suppose all we that ordered the StickOS can do this.

You have done a lot of work on this project and thank you very much for this.

As for the Chinese, what is their MOQ?

Ioannis

[mackrackit]

Bruce,
I agree with Ioannis. The reason I sent you my four chips is because I thought you had the magic machine. I can do the assembly with my tweezers.

So if it is any help just bag the stuff for me and let me know what I owe you.

[Nicmus]

I completely agree with Ioannis and Mackrakit that Bruce had done a lot for this project so if Bruce decides to send out kits I’m supporting it 100%.

One thing I’m not too clear is if we all should have send Bruce the blank chips (I didn’t) or he will be ordering them. Also I'm not sure if Bruce can do the initial programming of the chips before installing them.

I have a couple suggestions related with this project:

By now Bruce should have a fairly good idea what the cost per kit (assembled or not) should be but he has no financial backing from us. So to avoid this financial burden on him my suggestion is to have each of the participants in the program send their financial support. I personally suggest estimating it on the plus side just to make sure that Bruce doesn’t take a hit on this aspect also.

Even if there is a dedicated forum for StickOS users I suggest opening a separate section in this forum for this new project. It will make it much easier for the members of this forum to exchange information about this particular project.

Regards,

Nick