Sharp EL-8: Difference between revisions
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The calculator uses a [[reed switches|reed-switch]] keypad, [[:Category:VFD|Vacuum Fluorescent Displays]] (8x Itron [[Itron DG10L|DG10L]] and 1x Itron [[Itron SP8A|SP8A]]), and 9 [https://en.wikipedia.org/wiki/Integrated_circuit Integrated Circuits], the [[Rockwell]] [[Rockwell AC2261|AC2261]], [[Rockwell AU2271|AU2271B]], [[Rockwell DC1152|DC1152A]], [[Rockwell NRD2256|NRD2256]], the [[Hitachi]] [[Hitachi HD3121|HD3121]], and the [[NEC]] [[NEC UPD190C|μPD190C]]. | The calculator uses a [[reed switches|reed-switch]] keypad, [[:Category:VFD|Vacuum Fluorescent Displays]] (8x Itron [[Itron DG10L|DG10L]] and 1x Itron [[Itron SP8A|SP8A]]), and 9 [https://en.wikipedia.org/wiki/Integrated_circuit Integrated Circuits], the [[Rockwell]] [[Rockwell AC2261|AC2261]], [[Rockwell AU2271|AU2271B]], [[Rockwell DC1152|DC1152A]], [[Rockwell NRD2256|NRD2256]], the [[Hitachi]] [[Hitachi HD3121|HD3121]], and the [[NEC]] [[NEC UPD190C|μPD190C]]. | ||
== Gallery | == Sharp EL-8 == | ||
= Gallery = | |||
<gallery perrow="0" widths="350" heights="350"> | <gallery perrow="0" widths="350" heights="350"> | ||
File:Sharp EL-8.jpg|Powered on. | File:Sharp EL-8.jpg|Powered on. | ||
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File:Sharp EL-8 Power Supply (Bottom) with Battery Bypass Capacitor Mod.jpg|Bottom of the power supply board (with battery-bypass capacitor mod). | File:Sharp EL-8 Power Supply (Bottom) with Battery Bypass Capacitor Mod.jpg|Bottom of the power supply board (with battery-bypass capacitor mod). | ||
</gallery> | </gallery> | ||
== Facit 1111 == | |||
== External Resources == | == External Resources == | ||
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== See also == | == See also == | ||
* [[Sharp EL-160]] | * [[Sharp EL-160]] | ||
Revision as of 21:08, 15 July 2022
 | |
| Manufacturer | Sharp |
|---|---|
| Introduced | 1970 |
| Calculator | |
| Display type | VFD |
| Display size | 8 digits |
| Programming | |
| Other | |
| Serial Numbers | 1012099 |
The Sharp EL-8 was an early handheld calculator produced by Sharp.
Special features
Since the calculator uses the Itron font tubes it does not feature leading-zero supression, to help with readability (e.g. it would display '00000001' to display '1').
The calculator uses separate 'minus equals' and 'plus equals' keys, as well as a single key for multiplication and division, this was common for the time period.
Internal design
The calculator uses 3 PCBs internally, one for the logic, one for the display, and another for the power supply, the logic board and display board slot into a card-edge connector mounted to the keypad assembly, with the power board being connected to the display board via a wired connector and mounted with screws.
The calculator uses a reed-switch keypad, Vacuum Fluorescent Displays (8x Itron DG10L and 1x Itron SP8A), and 9 Integrated Circuits, the Rockwell AC2261, AU2271B, DC1152A, NRD2256, the Hitachi HD3121, and the NEC μPD190C.
Sharp EL-8
Gallery
Powered on.
Bottom case.
Badge (#1012099).
Rear of internals (with battery-bypass capacitor mod).
Front of the internals.
Powered-on without the display cage, there is copper tape against the back of the tubes and without the tape having a connection to ground the tubes will light dimly and unevenly.
Top of the keypad cage.
Bottom of the keypad cage.
Display board assembly.
Top of the logic board.
Bottom of the logic board.
Top of the power supply board.
Bottom of the power supply board (with battery-bypass capacitor mod).
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_with_Battery_Bypass_Capacitor_Mod.jpg)
Facit 1111
External Resources
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