Nick,
Ok, that's cool ... now what you need to do is tie the reset line low
(via say a 5k resistor), and tie the clock pin to +Vcc via another say 5k
resistor, then pull the clock pin down to low, it should then count per
pulse received. It needs a transitional voltage (i.e. needs to go from high
to low) to trigger properly. I would also suggest that in your final circuit
you tie all output lines to ground via 10k (or thereabouts) resistors. When
dealing with logic it is always a good idea (i.e. safe practice) to tie any
lines, used or unused, to a particular level.
If you want to trigger it, apply 0V to the clock pin without disconnecting
the resistor tied to +Vcc, to reset, apply +Vcc to MR1/2, again without
disconnecting the resistor tied to ground.
Hope this helps!
Regards,
JOn
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----- Original Message -----
From: "Nick" <Nickgraber@...>
To: <Electronics_101@...>
Sent: Sunday, August 05, 2001 12:13 AM
Subject: [Electronics_101] Re: counting ic's
ok well I did that I used a new chip just to make shure everyting is
good and I still cant get it to count. I was wondering are all of
the outpst low to start because it is counted 0 so it would have an
output of LLLL = 0000 = 0 but when I apply the negitve to the triger
for the counter I still get 0000. I am now using 2n3904 transistor to
run the led.
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