Difference between revisions of "RGB Matrix Backpack"
From Hackstrich
(Updating to reflect today's research/design work.) |
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== Rough Notes == | == Rough Notes == | ||
| − | * | + | * Going to use the PIC18F65K22 as it will drive all the pins needed directly (no muxes or anything) and is <$5 in single qty. Cheaper than using multiplexers and more flexible this way. |
| − | * | + | ** Also I haven't used PICs in any projects in ~5 years, so I want to try them out again :) |
| + | * Cathode/low side (columns) will be N-channel MOSFETs. | ||
| + | ** Which is nice because there are 24 columns to drive, but only 8 rows. Cheaper components on the columns is handy. | ||
| + | * Anode/high side (rows) should be a constant current source (single one, switched with MOSFETs or BJTs? or separate switchable ones? | ||
* Being able to plug them together in a 2D matrix would be awesome | * Being able to plug them together in a 2D matrix would be awesome | ||
[[Category:Current Projects]] | [[Category:Current Projects]] | ||
Revision as of 00:51, 27 September 2010
The RGB Matrix Backpack will be a small controller board to attach to 8x8 RGB LED matrices. It will accept input via SPI or I2C and control the display.
Rough Notes
- Going to use the PIC18F65K22 as it will drive all the pins needed directly (no muxes or anything) and is <$5 in single qty. Cheaper than using multiplexers and more flexible this way.
- Also I haven't used PICs in any projects in ~5 years, so I want to try them out again :)
- Cathode/low side (columns) will be N-channel MOSFETs.
- Which is nice because there are 24 columns to drive, but only 8 rows. Cheaper components on the columns is handy.
- Anode/high side (rows) should be a constant current source (single one, switched with MOSFETs or BJTs? or separate switchable ones?
- Being able to plug them together in a 2D matrix would be awesome
