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| The '''Sinclair Wrist Calculator''' was a wrist-worn calculator produced by ] and introduced in 1977. | The '''Sinclair Wrist Calculator''' was a wrist-worn calculator produced by ] and introduced in 1977. | ||
| ==Design== | |||
| The design used 10 keys, with a three-position ] to select the correct function. The switch was held to the left to access the functions to the left above the keys, and to the right to get the functions to the right above the keys. In the centre position it would enter the numbers on the keys.<ref name=pm>{{cite journal |url=http://books.google.co.uk/books?id=quIDAAAAMBAJ&pg=PA195#v=onepage&q&f=false |title=Unique full-function 8-digit wrist calculator... available only as a kit |journal=Popular Mechanics |date=April 1977 |page=195}}</ref> | |||
| ==History== | ==History== | ||
| The Wrist Calculator was launched in February 1977 by Sinclair Instruments, a company spun off from Sinclair Radionics when it started to encounter financial difficulties.<ref name=vc>{{cite web |url=http://www.vintagecalculators.com/html/wrist_calculator.html |title=Sinclair Wrist Calculator |publisher=vintagecalculators.com |accessdate=26 January 2014}}</ref> | The Wrist Calculator was launched in February 1977 by Sinclair Instruments, a company spun off from Sinclair Radionics when it started to encounter financial difficulties.<ref name=vc>{{cite web |url=http://www.vintagecalculators.com/html/wrist_calculator.html |title=Sinclair Wrist Calculator |publisher=vintagecalculators.com |accessdate=26 January 2014}}</ref> | ||
| It was only available as a mail-order kit, and cost around {{GBP|11}}.<ref name=vc/><ref name=ps>{{cite web |url=http://oldwww.nvg.ntnu.no/sinclair/calculators/wristcalc.htm |title=Sinclair Wrist Calculator |publisher=Planet Sinclair |accessdate=26 January 2014}}</ref> Despite the difficulty in assembling the kit due to the small size of the parts and their variability in specification, 10,000 were sold around the world. 20,000 were exported to the ], but most went unsold and were returned to Sinclair.<ref name=ps/> It was described as an "utter dud" and "impossible-to-build" by the journal ''International Design''.<ref>{{cite journal |url=http://books.google.com/?id=mfY4AQAAIAAJ&q=Sinclair+Wrist+Calculator&dq=Sinclair+Wrist+Calculator | |
It was only available as a mail-order kit, and cost around {{GBP|11}}.<ref name=vc/><ref name=ps>{{cite web |url=http://oldwww.nvg.ntnu.no/sinclair/calculators/wristcalc.htm |title=Sinclair Wrist Calculator |publisher=Planet Sinclair |accessdate=26 January 2014}}</ref> Despite the difficulty in assembling the kit due to the small size of the parts and their variability in specification, 10,000 were sold around the world. 20,000 were exported to the ], but most went unsold and were returned to Sinclair.<ref name=ps/> It was described as an "utter dud" and "impossible-to-build" by the journal ''International Design''.<ref>{{cite journal |url=http://books.google.com/?id=mfY4AQAAIAAJ&q=Sinclair+Wrist+Calculator&dq=Sinclair+Wrist+Calculator |title=International Design |volume=52 |issue=5-8 |page=105}}</ref> | ||
| ==References== | ==References== | ||
Revision as of 17:28, 29 January 2014
| Introduced | February 1977 |
|---|---|
| Design firm | Sinclair Instruments |
| Calculator | |
| Display type | Light-emitting diode |
| Display size | 8 digits |
| CPU | |
| Processor | Mostek MK50321N |
| Other | |
| Power supply | 8.1V |
| Dimensions | 47 by 45 by 18 millimetres (1.85 in × 1.77 in × 0.71 in) |
The Sinclair Wrist Calculator was a wrist-worn calculator produced by Sinclair Instruments and introduced in 1977.
Design
The design used 10 keys, with a three-position switch to select the correct function. The switch was held to the left to access the functions to the left above the keys, and to the right to get the functions to the right above the keys. In the centre position it would enter the numbers on the keys.
History
The Wrist Calculator was launched in February 1977 by Sinclair Instruments, a company spun off from Sinclair Radionics when it started to encounter financial difficulties.
It was only available as a mail-order kit, and cost around £11. Despite the difficulty in assembling the kit due to the small size of the parts and their variability in specification, 10,000 were sold around the world. 20,000 were exported to the United States, but most went unsold and were returned to Sinclair. It was described as an "utter dud" and "impossible-to-build" by the journal International Design.
References
- "Unique full-function 8-digit wrist calculator... available only as a kit". Popular Mechanics: 195. April 1977.
- ^ "Sinclair Wrist Calculator". vintagecalculators.com. Retrieved 26 January 2014.
- ^ "Sinclair Wrist Calculator". Planet Sinclair. Retrieved 26 January 2014.
- "International Design". 52 (5–8): 105.
{{cite journal}}: Cite journal requires|journal=(help)
| Sinclair calculators | |
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