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Old 2nd Apr 2021, 2:48 am   #151
ortek_service
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Join Date: May 2018
Location: Northampton, Northamptonshire, UK.
Posts: 1,396
Default Re: The Transam Triton Personal Computer

Thanks for those - Rather unexpected to see the bare sensor IC die in such detail.

Unfortunately, it seems the clear glob-top makes it difficult to see much under it very well, but I am thinking that these weren't actually wire bonded but wire either soldered-down Surface-mount style. Or possibly attached with silver-loaded conductive epoxy - which often seems to crack with age, sometimes after not too long a period. But still in all cases, not too easy to re-attach one.


I did have another thought about the pulses from these - Do they produce a (different) pulse when released?

Otherwise - if they only give a single pulse when pressed - then there would be no way of knowing if key had been released or was being held-down.
And so you wouldn't be able to have any auto-repeat on keys being held down making any scrolling via cursor keys or movement in any games etc. software a bit difficult.
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