Help identifying IC
derschjo at gmail.com
Sat Jan 20 20:06:45 CST 2018
Hi all --
I picked up this little toy at VCF West last summer:
As far as I can tell, it's supposed to be a clock and I assume it was a
kit -- this one was definitely hand-assembled. It's powered by two AA's
(apparently, there are no markings), has a 4 digit LED display, and at
the moment it does not work at all.
Can't find anything about this item at all. At the moment I'm curious
what the 28-pin IC at the top is -- there are no markings of any kind
anywhere on the chip. It has an interesting construction -- blue
plastic on both sides with a metal cap over the die. The two other ICs
are RCA 3081 and RCA 3082 which are simply transistor arrays for driving
the 4-digit LED display. I assume the 28-pin IC is a simple
microcontroller with built-in ROM, or perhaps it's a device specifically
designed to run a digital clock. Whatever it is, I'd love to know what
it does so I can debug this thing and possibly source a replacement.
I realize this is not a lot of information to go on, but on the
off-chance someone's seen something like this before I figured I'd give
it a go...
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