Help with R.G:s CMOS based juggler needed

[solderman]

Help!
I am about to build a switchbox with a loop shifter like R.G:s  Juggler from GEO and planned to use the 4053 CMOS instead of a 4DTP stomp switch or a electric relay. Since I want to be able to us it as a A/B/Y as well with a hand controlled switch to shift between loop or A/B/Y I only need to use two of the three switches in the 4053. To test how it works I bread boarded a test bench that switched two guitars between two amps. And yes it works. If I ground one LED  the 10, 11 pin gets almost +9V it switches both guitars between the amps as expected BUT it sounds like something in-between a green ringer and a Boing 747. Its un usable as it is now. Where have I gone wrong???

The IC is a CD4053BE I cant say from the datasheet what BE stands for.

I have tried to ground the unused pins 4,5and 3but maybe the should have +9 or Vb but I don't want to fry the thing before someone who knows might say its OK.

Any Idée's how to get it to work but silent??

My setup


R.G:s Original



//Solderman

[solderman]

BUMP
any one??

[composition4]

From a glance I can only suggest (if you haven't already) that you would need to tie the unused 4053 channel select input to ground... as in, pin 9.  If it's floating, being CMOS I think it can pick up stray signals and oscillate quite easily, because CMOS doesn't need any real current to get it going

If this doesn't work, I'm not sure because everything else looks okay to me... maybe someone else can pipe in

Jonathan

[earthtonesaudio]

The wire going to pins 10 and 11 should be on the cathode/ground side of one of the LEDs.  As you've drawn it, your switch gives those pins either almost 9V or 1.5V (whatever the LED's forward threshold is), but they never go to ground (0V).  This could be enough to cause the problem you've described. 
Grounding pin 9 couldn't hurt, either.

[solderman]

Hi
Thank's all
I found the error. The section of the bread bord I used for grounding the redundant pins on the CMOS was broken so what i thought was ground was not.
Now it works. I still have way to much 50Hz hum to take care of biot that i think i can handle.

//Solderman