Sharp EL-8: Difference between revisions
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== Gallery == | == 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. | ||
File:Sharp EL-8 Bottom Shell.jpg | File:Sharp EL-8 Bottom Shell.jpg|Bottom case. | ||
File:Sharp EL-8 Badge (1012099).jpg | File:Sharp EL-8 Badge (1012099).jpg|Badge (#1012099). | ||
File:Sharp EL-8 internals (Rear).jpg | File:Sharp EL-8 internals (Rear).jpg|Rear of internals (with battery-bypass capacitor mod). | ||
File:Sharp EL-8 internals (Rear 2).jpg | File:Sharp EL-8 internals (Rear 2).jpg | ||
File:Sharp EL-8 internals (Front).jpg | File:Sharp EL-8 internals (Front).jpg|Front of the internals. | ||
File:Sharp EL-8 internals (Powered on).jpg | File:Sharp EL-8 internals (Powered on).jpg | ||
File:Sharp EL-8 internals (Powered on without the display cage).jpg | File:Sharp EL-8 internals (Powered on without the display cage).jpg|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. | ||
File:Sharp EL-8 Keypad (Top).jpg | File:Sharp EL-8 Keypad (Top).jpg|Top of the keypad cage. | ||
File:Sharp EL-8 Keypad (Bottom).jpg | File:Sharp EL-8 Keypad (Bottom).jpg|Bottom of the keypad cage. | ||
File:Sharp EL-8 Display Assembly (Top).jpg | File:Sharp EL-8 Display Assembly (Top).jpg|Display board assembly. | ||
File:Sharp EL-8 Logic Board (Top).jpg | File:Sharp EL-8 Logic Board (Top).jpg|Top of the logic board. | ||
File:Sharp EL-8 Logic Board (Bottom).jpg | File:Sharp EL-8 Logic Board (Bottom).jpg|Bottom of the logic board. | ||
File:Sharp EL-8 Power Supply (Top).jpg | File:Sharp EL-8 Power Supply (Top).jpg|Top of the power supply board. | ||
File:Sharp EL-8 Power Supply (Bottom) with Battery Bypass Capacitor Mod.jpg | 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> | ||
Revision as of 19:44, 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 slotinto a card-edge connector mounted to the keypad assembly, with the power board being connected to the display board via a wired connector.
The calculator uses a reed-switch keypad, Vacuum Fluorescent Displays (8x Itron DG10: and 1x Itron SP-8A), and 9 Integrated Circuits, the Rockwell DC1152, and the NRD2256.
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)
External Resources
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