Is This Right? ( 555 and 4024)

Hey all,

Just curious...is this circuit right?

Just kinda double checking... major n00b here lol

Thanks!

You have pin 1 of the CD4024 shorted to ground.
The resistor from pin 3 of the 555 and pin 1 of the CD4024 is useless and can be replaced by a piece of wire.
A supply bypass capacitor is missing.

I knew the bypass cap was gonna come up

Hmm...okay, that's what I thought. That being so, then there are some false circuits floating around out there...deceiving poor minds like my own! Check it out...

Anyways, cool. That explains the erradic behavior. Thanks!

That circuit is crap! About 75% of circuits posted on the web are put up by noobs who are much better at screwing with html than they are electrical engineers.

First, Since the 4024 is a binary counter, and multiple outputs can be on at the same time, the LEDs connected to the outputs cannot share one common resistor.

Second, the push-button used to generate the clock input needs to be "de-bounced" because if connected as shown, the switch generates "glitches" (multiple spurious rapid closings/openings) which will advance the counter unpredictably.

Third, it needs a bypass capacitor across the power pins on the counter.

btw- I went and looked at about five circuits posted on that site. I found similar deficiencies with almost every one I looked at.

Hi,

hopefully this circuit will perform as required.

Boncuk