Models Derived from
ANITA Hand-held Calculators

minitron 811

minitron 811

Minitron 811
ANITA 861

minitron 811

Display is 8 digits, red LED.

4-function, %, memory.

4.5v (3x AA batteries).

69 mm x 118 mm x 24 mm (2.8" x 4.7" x 1").

Elektronska industrija-Ni, made in Yugoslavia (now Serbia).

For comparison here is the ANITA 811.

Minitron811_2

To replace the batteries the rear cover slides up, which also reveals the label which shows:

Ei (Electronics industry) OOUR FACTORY CALCULATING MACHINES-NI.

Circuit boards

The calculator has two circuit boards, besides the blue keyboard.

The circuit board underneath has components of an oscillator.

Main circuit board

Close up of the top circuit board showing the Rockwell A4130CA integrated circuit (here date coded 1976, week 09).

Comparing these circuit boards with those of the ANITA 811 shows that they are very similar.

Click here to go to the Vintage Calculators Web Museum

Text & photographs copyright © 2002 - 2017 Nigel Tout, except where noted otherwise.