Currently involved with the rather fun one
of the main Components for the Challenge Kit is the PIFace Control & Display
We wanted to know what's inside and what's connected to what but unfortunately
the 16x2 LCD is soldered to the main PCB. Fortunately I have a good de-solder tool to hand
and a few minutes latter we had this.
First thing you see is the 16 bit SPI port expander from Microchip MCP23S17
From a set of very close photos I'm taking an educated guess the IR Receiver (SV2) is a Vishay TSOP 34438.
Take a look at the data sheet and the drawing below to get an idea of how it's connected..
I've done a check over with the multimeter and checked the continuity and values where appropriate and I feel they are
more or less right .. please contact us with any comments or corrections ..cheers
Here's the Johnny CAD drawing 
and yes I know I can't draw !!
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