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Old 4th Nov 2020, 12:38 am   #67
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 1,155
Default Re: I found it! A very sorry looking MK14.

Originally Posted by Buzby123 View Post
The daughter board is a real horror. I think I might give up with that, stick Micky's bits into Slothie, then start again from a known working platform.

Regarding the display-driving 7408's, what is the reason for not using LS versions ?.


The resistance of the output stage is different, and I speculate that the input capacitance helps the 74ls157s latch the segment data. I don't however know of anyone whose tried LS parts so I don't know specifically that they won't work.
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