[simpits-tech] Whats happenin?

[Gene Buckle]

On Wed, 25 Aug 2010, Contrapezist wrote:

> I was going to suggest some strangeness with the clamp diodes, my 
> dealings with the ULNXX IC's they can do some strange things with out 
> pull up/down and unloaded.
>
While I still haven't checked the cable yet (after flogging my sorry ass 
at the gym for an hour every day, I don't have much oomph to do much when 
I get home *laughs*) I did check the boards to make sure I wasn't 
accidentally shorting the diode common to the 8th output leg.  That came 
out ok.

The test rig is just 16 green LEDs on a bread board with 220ohm resistors 
between the LED and the hot side of 5vdc.  The ground feeds into the 
uln2803.

> It is a sad day for me. I made what was possibly the last trip to my 
> favorite junkyard (actually the only dig away and load up junkyard round 
> these parts). They started clearing it out several months ago after the 
> old man died, I went to pillage my favorite junk pile today and it was 
> gone. Did latch on to some things Ive been pondering not quite sure if 
> its what I want/need and some other random bits because they may be gone 
> shortly. Seems like all the old junk men are slowly dying off and the 
> junkyards along with them. Austin

That's too bad.  There's no neat places like that around where I live. 
Just stingy scrappers that think their 20 year old computer bits are 
dipped in gold.

g.

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