Sinclair Cambridge Programmable Calculator

The Sinclair Cambridge Programmable Calculator was also sold in the U.S as the Radio Shack EC-4001.
It had an 8 digits red LED display (made by National Semiconductor).


Scientific programmable. Integrated circuits - National Semiconductor MM5799EHY/N and DS7784N
9v (PP3 battery) - a "pregnant" mode because of the bulge on the back, see photograph
50 mm x 111 mm x 28 mm.
Made in England.

This was originally purchased on the 4th September 1976


Manufacturer: Sinclair
Date: 1st September 1976

Other Systems Related To Sinclair Cambridge Programmable Calculator:

Item Manufacturer Date
Sinclair Enterprise Programmable Sinclair Unknown
Sinclair Executive Sinclair Radionics 1972
Sinclair Executive Memory Sinclair 1973
Sinclair Cambridge Type 1 Sinclair July 1973
Sinclair Cambridge Type 3 Sinclair 1975
Sinclair Scientific programmable Calculator Type 2 design Sinclair 1975
Sinclair Cambridge Memory Type 3 Sinclair 1975
Sinclair Oxford 200 Type 1 Sinclair 1975
Sinclair Oxford 200 Type 2 Sinclair 1975
Sinclair Oxford 200 Type 1 (Early style) Sinclair 1975
Sinclair Oxford Universal Sinclair 1975
Sinclair Cambridge Type 4 Sinclair 1975
Sinclair Cambridge Scientific Calculator Sinclair 1975
Sinclair Sovereign Gold Sinclair 1976
Sinclair Oxford Scientific White Calculator Sinclair 1976
Sinclair Sovereign Sinclair 1976
Sinclair Cambridge Programmable Sinclair 4th September 1976
Sinclair Cambridge Programmable Sinclair 4th September 1976
Sinclair Instrument Wrist Calculator Sinclair Instrument February 1977
Sinclair President Sinclair 1978

This exhibit has a reference ID of CH2695. Please quote this reference ID in any communication with the Centre for Computing History.


Sinclair Cambridge Programmable Calculator

Click on the Image(s) For Detail

Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum