Frugal is a good word too... On Mon, Dec 7, 2015 at 4:55 PM, John R. Hogerhuis <[email protected]> wrote:
> On Mon, Dec 7, 2015 at 7:36 AM, Ken Pettit <[email protected]> wrote: > > > The implementation in the picture is a daughter card for the Raspberry > Pi 2 > > B (a "Pi Hat"). It connects with the Model T parallel port for primary > > communication of video data, but also has an RS-232 port (and a BCR > port). > > It also has a "pass-through" LPT connector where your old LPT printer > can be > > connected. Making TDock a Pi Hat was the simplest and cheapest approach, > > though it is not very portable and has the requirement of booting / > shutting > > down Linux. > > > > With a juice pack or other gadget the Pi can be portable. > > We're going to be testing one of these boards where I work very soon: > > http://www.modmypi.com/raspberry-pi/breakout-boards/pi-modules/ups-pico > > This gives the Pi the chance to power down gracefully if power is cut. > Also it has a hookup for adding an external battery so you can power > the pi for hours if you like. > > We're going to be testing it because of stability issues due to hard > power cycles. > > This is important because at least with the default images floating > around for the Pi, the boot image corrupts easily. In our case, we > need portions of the SD card filesystem to be read/write. I've also > done various things to lock down the file system making specific > portions read-only, set noatime, log to ramdisk instead of SD card, > etc but I don't know how much if at all these changes will help until > we really start rolling it out in larger numbers. > > -- John. > -- *"I will never in my lifetime make a film that cannot be seen by the whole family"* Arther P. Jacobs
