[sdiy] Staircase Generator: 4 bits but 8 steps?

[Simon Brouwer]

At 21:04 7-9-2005, you wrote:
>TTL is _not_ very good at sourcing current,  much better at sinking it,  so I
>would tend to build something like this with one end tied to +Vcc and some
>sort of a buffer or other open-collector part pulling the inputs to ground,
>for whatever thats' worth...

I would use a 74HCT93 instead of the 74LS93. HCT output levels will be 
close to 0 and Vcc, so that it is far better for this application. Apart 
from that, the 74HCT will be an uncomplicated replacement, because its 
inputs are 74LS compatible.


Vriendelijke groet,
Simon Brouwer.

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