Texas Instruments Universal Slide Rule Board 234D. Replacement Light Emitting Diode (LED) bubble type display for Texas Instruments classic second generation calculators; SR-50A, SR-51A, SR-52 & SR-56.
A new old stock 14 digit (including 10 main + 2 exponent seven segment digits) LED display. Manufactured in 1975. See photograph of full lit display to see available characters for each digit.
No data sheet, but pin out for those interested/ intending to use for other purposes is (see key on last photo)
Pin 1: Dp for digits 1, 2, 4, 5, 6, 7, 8, 9, 10 & 11
Pin 2: g for digits 1 & 12
Pin 3: c for digits 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 4: d for digits 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 5: e for digits 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 6: Dp for digit 3
Pin 7: g for digit 3
Pin 8: b for digit 3
Pin 9: Digit 1
Pin 10: Digit 2
Pin 11: Digit 3
Pin 12: Digit 4
Pin 13: Digit 5
Pin 14: Digit 6
Pin 15: Digit 7
Pin 16: Digit 8
Pin 17: Digit 9
Pin 18: Digit 10
Pin 19: Digit 11
Pin 20: Digit 12
Pin 21: Digit 13
Pin 22: Digit 14
Pin 23: b for digits 2, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 24: a for digits 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 25: g for digits 2, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
Pin 26: f for digits 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 & 14
As this is a display intended for a specific range of calculators with 10 main digits plus 2 for exponents, to save costs during original manufacture, not all digits have a full complement of segments. The digits can display the following information:
Digit 1: -.
Digit 2: 8.
Digit 3: 8.
Digit 4: 8.
Digit 5: 8.
Digit 6: 8.
Digit 7: 8.
Digit 8: 8.
Digit 9: 8.
Digit 10: 8.
Digit 11: 8.
Digit 12: -
Digit 13: 8
Digit 14: 8
New old stock (not soldered).
Images are illustrative, actual from same batch. May have marks from storage. Will be tested, but otherwise unused. Item is for 1 x single UNIV SR BRD 234D display only, no other items included.
Dispatched with Royal Mail 2nd Class Large Letter. UK mainland only.