Any early Casio calculator, with quite a bit of components. To save cost Casio just display 6 digits. The keyboard uses metallic wires and a thin sheet of steel with multiple springy cutouts. A key problem with such a keyboard is key bounce and this has to be solved with either hardware or software. This particular Vintage Casio Mini Electronic Calculator CM-602 suffers from key bounce randomly, causing digits to repeat themselves even though the key is press only once.
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Casio Mini CM 602 Calculator Made In Japan 1970s
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The keypad would benefit from some cleaning maybe replacement
of the wires use for the fixed portion of the key contact. Currently the
keypad exhibits a good amount of key bounce resulting in repeated digits. |
Yep, this is the very first electronic calculator I had ever used (or seen for that matter.) From the mid-seventies I believe it sold in the neighborhood of $125. Also one of the earliest uses for AA batteries outside of pen-lights that I can recall.
ReplyDeleteThanks for posting!