Friday, 15 February 2013
Sunday, 10 February 2013
The OUYA is a $99 games console powered by a Tegra 3 processor (quadcore ARM).
Do you want to know what can be done with the OUYA and where the limits are ?
There is more than just games for the OUYA, we will like to discover media centers,
web browsers and many other tools and utilities to come.
Debian on OUYA:
http://tuomas.kulve.fi/blog/2013/08/11/debian-on-ouya/
I will try to keep you up to date with news that matters.
Order the E-Book (PDF) for 2 Euro and you will get all facts and news in one place.
The book is a work in progress, You will receive updates per email in regular intervals.
- includes information how to load Apps
which are not available from the OUYA store (sideloading)
- how to get root access rights
- modify your OUYA (use play store,...)
The delivery of the PDF file may take up to 48 hours.
Friday, 1 February 2013
The PiFace is actually an I/O extender that uses the SPI bus to extend the I/O capabilities of the Raspberry Pi with 8 extra input and 8 extra output pins.
While all 8 input and 8 ouput capabilities are routed to pins for external connection, some have a double function. 2 of the 8 output pins are used to drive a couple of Relays, and 4 of the 8 input pins are fitted with buttons on the board itself. Further the input pins are directly connected to the I/O extension IC, there is no protection for over voltage in these circuits.
The 8 output pins are driven by a ULN2803A, this means that each output pin can drive up to 500mA (externally supplied) at a maximum of 50V.
In theory you could connect 4 PiFace boards to the RPi, because the address of the SPI I/O extension chip (MCP23S17SP) can be set using 2 jumpers. In reality this will be very hard to achieve because the PiFace is a board that needs to be stacked on top of the RPi and the main connector (the one on the bottom that connects to the GPIO pins on the RPi) is not fitted with a female counter part on the top to enable stacking more boards. I guess they did not do that because the Relays are too high anyway to enable stacking.
http://www.element14.com/community/docs/DOC-52896/l/piface-get-started-guide-feb-2013
http://piface.openlx.org.uk/kernel-driver-delays-and-new-interface-board
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