Elektronika MK33
Brief History
The very thin pocket calculator named Elektronika S3-33 was in production from 1978 at the Svetlana factory. The redesigned keyboard and use of rechargeable button cells resulted smaller dimensions. After redesign of some calculators, this model was produced as Elektronika MK 33 by the 1990s. The later series has a KR145IK16 CPU, which has two more functions to earlier models, but these are not labeled to the keyboard.
| Manufacturer: | Светлана (Szvetlana, Svetlana) (USSR) |
| Mfg. date: | 1983-92 |
| Size: | 7×13,1×1,4 cm |
| Weight (ready for operate): | n.a. |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | semi-arithmetic (Rockwell) |
| CPU: | Szvetlana KR145IK16 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (2) Sqrsquare root pivalue of pi (3.1415..) can be recalled |
| Display: | 9 digit LED (ALSz318) |
| Power: | 3×rechargeable coin cell battery |
MK 33
Inside of the MK 33
Keyboard and display of the MK 33
Detailed Description
Interesting Features
The negative sign appears in the rightmost place.Square root of a negative number results to error, but only the sign was displayed.
Adding negative number and its absolute value results -0. E.g. 3 /-/ + 3 = shows 0.-.
Only the later series has the following features:
First pressing the ?? key, the display shows the contents of the memory. Second press of this key shows the constant pi with 8 digits: 3.1415926. Further pressing of this key exchanges these results.
Second pressing the = key rounds the result to 2 digits. E.g. 2 3 = results 0.6666666, re-pressing the = the display shows 0.67.
