Difference between revisions of "BrailleNote Tieman Display"
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| + | The Tieman braille display was the first model used in the BrailleNote notetakers. This display has reliability issues, and I'm reverse-engineering it to try to fix mine which is broken. | ||
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* Display uses 1 "backplane board" per 8 cells | * Display uses 1 "backplane board" per 8 cells | ||
* Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip | * Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip | ||
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*** Grey - Direction (Low = A in, B out) | *** Grey - Direction (Low = A in, B out) | ||
** Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working | ** Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working | ||
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| + | [[Category:Products]] | ||
Latest revision as of 12:03, 20 December 2011
The Tieman braille display was the first model used in the BrailleNote notetakers. This display has reliability issues, and I'm reverse-engineering it to try to fix mine which is broken.
- Display uses 1 "backplane board" per 8 cells
- Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip
- The HV507PG is a high-voltage 64 channel shift register
- Pinout of display connector (from edge of board opposite SMD cap)
- Left Side (male)
- Red - HV (~250VDC)
- Grey - Ground
- Grey - Data B
- Grey - Straight through to right side
- Green - CLK
- Grey - !LatchEnable
- Grey - LV (~5VDC)
- Grey - Direction (Low = A in, B out)
- Right Side (female)
- Red - HV (~250VDC)
- Grey - Ground
- Grey - Data A
- Grey - Straight through to left side
- Green - CLK
- Grey - !LatchEnable
- Grey - LV (~5VDC)
- Grey - Direction (Low = A in, B out)
- Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working
- Left Side (male)
