Hey, neat! I might have to build a clock around 74142's just to try it.
First thing that comes to mind is that one could build Mike Harrison's
clock without all the HV transistor drivers... Although, I suppose the
250vdc supply on his board would be too hot for a 74141 so probably too
hot for a 74142.. Maybe a transformer supply..
-Adam W7ATJ
On 7/26/2011 7:25 AM, John Rehwinkel wrote:
74142 is just about unobtainium now.
Not really. Abra is among the top hits if you search for it, they offer 'em
for $7 apiece or $6 each for 25 or more. A tad expensive, but hardly
unobtainium.
7400 series DIP:
"ABRA has one of the largest inventory of TTL in North America. Our 74 series is
from major manufacturers, guaranteed, and at incredibly low prices. Call us for large
quantities."
http://www.abra-electronics.com/categories/ICs%7B47%7DSemiconductors/74-Series%252dDip-Package/
74142:
http://www.abra-electronics.com/products/74142-IC-TTL.html
- John KG4L
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