Transistor Clock Part 3: Binary Counter and 7-segment Decoder
Now for the third and final installment of the Transistor Clock
saga.  Pretty isn't it?   We left off last time with a series of
frequency dividers that could give us 1/10 and 1/6 reductions of
frequency.  These could be used not only to reduce the 60Hz
coming out of the wall to a 1 second tick, but also to reduce
that 1 second tick to a 10 second tick, 1 minute tick, 10 minute
tick, and so on.  While the clock is technically already keeping
time, it doesn't do us much good if it can't be read.  The last
little challenge is to turn those ticks into numbers.  Compared
to the last two posts, this one should be rather easy.  Binary
Counter  Ordinarily, when faced with the challenge of keeping a
count of clock ticks, one might use something like a binary
counter such as the one I used in my Chris Jericho post.  Such a
device takes in a clock signal, and counts the number of ticks
displaying the current count in binary on its output pins.  Now,
you mig