Thanks! I hadn't seen the earlier question. MCP23017 looks like a very good option.

Hi - I'm helping build a musical instrument which can be controlled by a midi keyboard. For output I want solenoids to strike bells that are tuned for a 4 octave range (12 notes per octave). The midi inputs seem pretty easy - the https://github.com/SpotlightKid/python-rtmidi source can read the outp...

Yes, you can get the raw data and process yourself, as I demonstrated in the thread you referenced. It takes a lot of work and time, but it is possible. You might be surprised at just how ugly the image looks without the extensive processing that the R-Pi's image pipeline does. Yes - I was amazed. ...

Does the YUV option output the 10 bit data or is it truncated to 8 bits?

I'd like to ask a followup question - I am looking at building a similar setup (xrays hitting a phosphor screen). What I want in the end is a high quality, repeatable image for medical diagnostic purposes. From this post http://www.raspberrypi.org/forums/viewtopic.php?t=44918&p=357959 it looks like ...

Hi - I just had an identical symptom and there was an easy fix. I had attached a crazyradio (for the crazyflie quadcopter) to the USB port and the Pi would not launch X; the basic problem was that the file system was read-only. "df -h" showed that my disk was about 36% full so there was plenty of ro...

I see in /boot/config.txt I can set rotation options - but I can't do the reflection transform I need for the screen. Rotations work fine. 1) Can someone point me at the code that parses config.txt? I want to see if there is a way to send down a different projection matrix to solve my problem. 2) Th...

I'm also having the issue: home/pi# xrandr -x X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 149 (RANDR) Minor opcode of failed request: 2 (RRSetScreenConfig) Serial number of failed request: 14 Current serial number in output stream: 14 Is there a...