# How do I connect this piece of electronics to show the digit display? (from satellite decoder)

I have the following piece of board/electronics:

Now, I recently bought an arduino, so I want to connect the digit display to show digits,

I already have blown out an IR receiver so that's the reason I disassembled an old satellite decoder, and I pulled the IR receiver out from this.

But now I am curious, I cannot find any datasheets for this (maybe they are closed source?).

I am wondering how I can connect this to work with an Arduino?

• Interesting. The display has its own dedicated ATTINY2313 MCU, but the buttons have direct wires back to the main board. Given the SCL and SDA test points, it would seem that the main board communicates with the display via I2C, which actually complicates matters. Directly driving the display would be easier to explain. – Dave Tweed Mar 7 '14 at 21:39
• In the vein of what @DaveTweed said. The 7-segment characters are driven from that μC and commands are sent to it via I2C. The communication protocol is unknown, because the board is salvaged from a piece of consumer electronics. – Nick Alexeev Mar 7 '14 at 22:16
• OTOH, you could probably reprogram it with this code after making some changes to it. – Ignacio Vazquez-Abrams Mar 7 '14 at 23:09