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| 1 | Ben Blinkenlights |
| 2 | ================= |
| 3 | |
| 4 | This project is a proof of concept implementation of Rikard Lindstrom's |
| 5 | idea of using the Ben's 8:10 card slot as a general extension interface |
| 6 | also for devices that don't speak MMC or SD/SDIO. The application is a |
| 7 | simple LED circuit, as suggested by David Samblas. |
| 8 | |
| 9 | The 8:10 card slot gives access to six GPIOs, a 3.3 V supply that can |
| 10 | be switched on and off by software, and ground. We use a simple form of |
| 11 | multiplexing to drive ten LEDs with this interface. |
| 12 | |
| 13 | Note that one should only light one LED at a time. If multiple LEDs are |
| 14 | lit, they will share the current though the common resistor, and will |
| 15 | thus be less bright than a single LED. |
| 16 | |
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