Most common calculators in the forum?

[Maximilian Hohmann]

... part 2 ...

One of the legendary masterpieces of industrial design by Braun, a type 4 777. A child of the 1990ies but the basic design has been around since the 70ies:


Another rebranded Casio school calculator, this time under the name of a once famous German typewriter manufacturer of which only the name remains, called Olympia LCD-8310:


Not yet a calculator, but maybe the heart of a future one, a Raspberry Pi (5 Euros only!). If one would remove the large connectors and add a small display (OLED maybe?) it could just fit inside a Woodstock housing...:


Here is one of the few non-HP RPN calculators, a Privileg SR 54 NC. The "NC" part is not working any more, but the rest is just fine. It displays a wonderful lightshow for almost a second when computing transcendental functions. For that alone it is worth having one:


And this again is not a calculator but was made by HP and can be convertred into a USB infrared receiver with one of the Arduino mini boards following Martin Hepperle's instructions in this forum:


And here comes the strangest novelty calculator I have come across in 30 years of collecting. An electronic (toy) microscope from China calling itself "Dr.Mike" which was obviously built around the hardware of a mobile phone (camera, screen, USB interface, SD-card interface, FM radio, you name it). It's menus still have all the functions commonly found on a phone, many of which make absolutely no sense in a microscope:


Especially the calculator - called Kalikulator! - which can be operated only with three buttons: left arrow, right arrow and enter. Adding 1 and 1 requires 49 key presses (I really counted them!) which must be the all time record for any calculator: