DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| Voltages measured at
Digit 4 (right-most) and Digit 6 (left-most) of the
center SP-753 display envelope. Digit blanking time of 148 us or 15 State Times of the TMS1875 suggest a clock frequency of 300 kHz.
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Clock signal of
the TMS1875 measured at around 300 kHz. |
Complete display scan
'oo123456.' of the TMS1875 with Segment H static active. |
Digit blanking time (Digit 2 to Digit
1) of the TMS1875 confirmed at less than 20 us. |
Output
characteristics of the Segment H driver of the TMS1875. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 18, 2023. No reprints without written permission.
