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LED Matrix: Difference between revisions
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[[File:Led_magicbus.jpg|thumb|right|300px|All the LED boards in their original matrix]] | |||
The LED boards came from a display board that sat outside Your Shop. In their past life they conveyed useful information about the magic bus, how to get NUS cards and the courtyard opening times. After some dismantling, starting at datasheets and tracing out; a vague schematic for the boards has been created. | The LED boards came from a display board that sat outside Your Shop. In their past life they conveyed useful information about the magic bus, how to get NUS cards and the courtyard opening times. After some dismantling, starting at datasheets and tracing out; a vague schematic for the boards has been created. | ||
== The Basics: == | == The Basics: == | ||
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== Driving the Board: == | == Driving the Board: == | ||
[[File:Led_ystv.jpg|thumb|right|300px|LED board with ystv logo]] | |||
Clocking data into the LED drivers is trivial, setting the row is more difficult. IC2's outputs are connected (via FETs/transistors) to each row line. When the corresponding '''bit is 0''', that row is '''enabled'''. | Clocking data into the LED drivers is trivial, setting the row is more difficult. IC2's outputs are connected (via FETs/transistors) to each row line. When the corresponding '''bit is 0''', that row is '''enabled'''. | ||
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Example (Arduino) code (By [[hist:Thomas Cheyney|Thomas Cheyney]]) for driving the boards is available from the [https://git.ystv.co.uk/MiscSoftware.git/ MiscSoftware] repo on YSTV's git server. At the time of writing there are timing issues to resolve and noticeable flicker. | Example (Arduino) code (By [[hist:Thomas Cheyney|Thomas Cheyney]]) for driving the boards is available from the [https://git.ystv.co.uk/MiscSoftware.git/ MiscSoftware] repo on YSTV's git server. At the time of writing there are timing issues to resolve and noticeable flicker. | ||
[[Category:Technical]] | [[Category:Technical]] | ||
