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help using 4017 decade counter

J

jabboo

Jan 1, 1970
0
I have a problem
I recently put together a simple circuit
involving a 555 timer and a 4017 decade counter
the 555 timer is set to 2 seconds
ive connected 10 LED's to the 4017 counter
and it works sort of ...
well the lights go on like there meant to
(led 1 turns on, then off then led 2 turns on (led1 switches off) then led3
on ( led 2 off) and so on..)
so there is always only 1 LED turned on .
my problem comes when it gets to the end of the row and has to repeat.. no
LED's turn on
well there is a delay between ..( led 10 turning on and led 1 turning on
which means that there isn't any led's turned on)
is it possible to get rid of this gap so there is always one led turned on.

am I making sense ?

any ideas?
 
G

gcd

Jan 1, 1970
0
Hi,
Make sure both CLK enable and RESET are tied to GND.

If they are, how long is this gap? I think that's it could be an optical
illusion. Try putting the LEDS in a circle and see if that still happens

Try the circle and let us know what happens.

Greg
 
J

jabboo

Jan 1, 1970
0
lol found my problem
only 9 leds :(
last one wasn't there
must of miscounted :p
no wonder there was a gap
I feel very stupid

--
Anthony jabbour


gcd said:
Hi,
Make sure both CLK enable and RESET are tied to GND.

If they are, how long is this gap? I think that's it could be an optical
illusion. Try putting the LEDS in a circle and see if that still happens

Try the circle and let us know what happens.

Greg
 
G

gcd

Jan 1, 1970
0
he he,
it happens :)

Cheers

jabboo said:
lol found my problem
only 9 leds :(
last one wasn't there
must of miscounted :p
no wonder there was a gap
I feel very stupid

--
Anthony jabbour


gcd said:
Hi,
Make sure both CLK enable and RESET are tied to GND.

If they are, how long is this gap? I think that's it could be an optical
illusion. Try putting the LEDS in a circle and see if that still happens

Try the circle and let us know what happens.

Greg
repeat..
 
R

Rod Speed

Jan 1, 1970
0
jabboo said:
lol found my problem
only 9 leds :(
last one wasn't there
must of miscounted :p
no wonder there was a gap
I feel very stupid

A Jap would at least have the decency to disembowel itself |-)
 
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