Anita MK12 vintage nixie calculator, number entering fault

This is to show a nasty problem in my Anita MK12 machine. In https://youtu.be/PDrMX56Yq9I you can see how it should work. Entering just one number results in quite random numbers at random places in the registers. After entering a number, the machine should stop the oscillator and wait for the moment when you release the button. Instead of that the machine keeps running until the display is filled up with randomness... The problem comes trough the buffer card which keeps down the 'stopway' signal. I've omitted this card to track down the error. (sorry for the annoying beep, that is my failing Nokia 1020 camera)

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2017/09/02 proxxima038   Share on Facebook

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