On Sun, 22 Apr 2001 at 17:40:22, you wrote:
(ref: <200104221740220390.00EF6240@midpoint>)
>On 4/22/01 at 9:43 PM Tony Firshman wrote:
>
>>>It was confusing with some early control boards, when the electronics
>>>were wired to be active when 'pulled low' to 0; rather than 'taken high'
>>>to 1. Inverse logic.
>>
>>That is very common - called 'common collector'' - sorry about the
>>unintentional pun. Nasta is the best one to expand on this - to do
>>with the easiest way to set transistor based output. (less than a page
>>plse Nasta (8-)# )
>>
>
>That's 'open collector' or 'open drain' in MOS logic.
<Nasta's _very_ comprehensive reply snipped> - I just knew he would,
which is why I didn't say much (8-)# (and what I said was worng)
>>I put in a couple of 7804s to invert the 4 L298 power driver enable
>>lines, and disable output.
>>
>
>7404, surely :-)
Yeah - slip of the fingers.
>
>Well, it's less than one page on my screen (it's set to 1600x1200 :-) ).
(8-)#
.... so that is why we get such a lot.
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