Uglyface 555 chip

[$uperpuma]

I did the mix-mod... it works, ok... but the signal never gets completely clean..its still overdriven when the mix is all the way couter-clockwise... I only put it on my latest one because the guy will be using it with keyboards and may want to bring the effect in and out on the fly...

[oldrocker]

Well I replaced the LM555 chip with the TLC555 chip and I hear no difference.  It works the same and sounds the same to me.  It's no big deal but I just wanted to let people know that if you can only find a LM555 chip for your UglyFace it will work.  If there is a difference it's so slight believe me you won't notice.  I know this may be hard to believe but I actually found a Rat Shack employee who knew electronics.  He was the one I bought the first LM555 chip from and he asked me if I was working on the same circuit.  I told him I was and he said there shouldn't be any noticable difference between the LM555 IC or the TLC555 IC and I guess he was right.  So I can only assume the LM is CMOS.   

[The Tone God]

So I can only assume the LM is CMOS.

Instead of assuming why not get the facts from the datasheet. In this case the LM555 is not CMOS according to my quick read through.

http://www.national.com/ds/LM/LM555.pdf

The TLC555 is CMOS.

You probably just found a 555 with the right specs to fit the circuit's needs but I would not count on the consistency based on Tim's comments.

Andrew

[oldrocker]

Oh,  OK I see.  I guess this CMOS chip just through me for a loop.  Well I've got a lot to learn about these.  I keep forgetting that specs with some components can vary a lot.  Oh well I left the CMOS IC in there since that's what it's supposed to have.  I guess I was lucky with that LM chip I had in there.  I can always use it to build another Crash Sync.  I know Tim knows what his stuff.  I hope he doesn't think I was trying to prove him wrong or anything I was just confused at the why this chip worked.  I get it now.  Sorry for all the confusion on my part.