Portable Electronic Calculators

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Olympia CD 100

Olympia CD 100

Olympia CD 100

Distinctive features: A hybrid desktop & hand-held calculator - It has both a transformer for AC operation and can take disposable batteries for hand-held use.

Technical details:
Display is 8 digits, separate blue-green Vacuum Fluorescent Display (VFD) tubes.


Main integrated circuit - Texas Instruments TMS0105ANC, here date coded week 11 1972.  There are also 35 discrete transistors.

Can be powered by either AC line or 4-C disposable batteries.

150 x mm x 55 mm (5.9" x 7.7" x 2.2").

Made in Japan for Olympia Werke AG., Wilhelmshaven, West Germany.

Olympia sold several models of 'Portable' calculators, with both AC supply and batteries into the mid-1970s.

Inside Olympia CD 100

View inside the Olympia CD 100 showing the VFD tubes of the display  near the top.  The transformer of the AC power supply is to the left and the  size C batteries fit in the compartment behind the display.  Also prominent are the 35 discrete transistors, showing as black blobs with one flat side.

Allowing the machine to be powered by either AC through the internal transformer or the batteries gives the advantage of each, at the disadvantage of the transformer making the machine larger and heavier.

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2020  except where noted otherwise.