CheesyChips

A totally reworked revision!

In order to make it fully battery powered, I've changed out to a 2032 coin cell and removed the switching supplies - even under no load, these can get through an awful lot of current (relatively!). Also changed to a discrete ATmega chip, rather than having the full overhead of a *duino onboard. Boards have been ordered, and should be here pretty soon - once I know they're working, I'll upload the files to GitHub.

It is finally working! In hindsight, for a device intended for battery power, the Teensy wasn't a good choice, as it's very difficult to work out exactly what it's doing. This version will send back data (Temp + humidity) to a RasPi server, which logs to a .csv file. I don't intend to pursue this version of the board further, and will be looking at a lower powered implementation using MSP430 or an 8-bit AVR. Also, the form factor can be made smaller using those chips. The pressure sensor does not appear to be working either (tried two boards), which I think may be a problem with the reflowing as I've used these chips before successfully. Working code and boards up on GitHub now, feel free to ask any questions :)

...hence not so much time to work on Cheesy Chips. The software is looking good, but there are some hardware issues, possibly due to the reflow soldering. Hopefully this week, there will be some progress!

Soldered on the remaining components - resistors, capacitors, button, LED, sockets. Soldering in the heat of a North Carolina summer isn't so lovely. Next up is code for both the monitor and the server. Definitely my weakest area, so maybe a few days to get it working nicely? Fingers crossed!

(yes, that is the bathroom sink - best place for light at this time!)

Added board and schematic to GitHub - see link. There's some code for the server side as well, but nothing that really works as intended yet!

First set of boards has been delivered, and the QFN packages reflowed. Soldering for the other parts to commence tomorrow! Processing scripts on the way as well, and all boards and code to be released soon. Thanks for looking :)