Introducing the Walking-Wah

[Crontox102098]

Done  sorry for the volume dips, put my foot on the camera's microphone.

[pinkjimiphoton]

very nice!! look forward to trying it bro! 

[haveyouseenhim]

I just made it on my breadboard and I got it to sorta work after a few minutes of playing a fuzzwah the leds went really dim. or maybe im just screwing everything up     I dont really like the lfo too much for a wah because its square wave but im sure I'll have a use for it on something else. 

[pinkjimiphoton]

is it working on chords? carlos pm'd me and said his is only working on single notes, if i understood him correctly.

[Crontox102098]

is it working on chords? carlos pm'd me and said his is only working on single notes, if i understood him correctly.

Only works with single notes and do not know why, but it improves a bit by changing the R4 100K 470K resistor.

I just made it on my breadboard and I got it to sorta work after a few minutes of playing a fuzzwah the leds went really dim. or maybe im just screwing everything up     I dont really like the lfo too much for a wah because its square wave but im sure I'll have a use for it on something else. 

Try other LFO with sine or triangle wave, the lfo of Tremulus lune sounds like  .

[Crontox102098]

How to remove the distortion/fuzz effect?   

[pinkjimiphoton]

 i guess just re-build it with just the wah part maybe?

[Crontox102098]

i guess just re-build it with just the wah part maybe?

I dont know which is the wah part... :S some know?

[pinkjimiphoton]

well, the wah part is the part with the darlingtons...the lfo is just what sweeps it.
i think the fuzz is a groovy side effect of the circuit.

give it a little time...there may be a way to salvage this circuit, i liked the demo quite a bit!

[Crontox102098]

well, the wah part is the part with the darlingtons...the lfo is just what sweeps it.
i think the fuzz is a groovy side effect of the circuit.

give it a little time...there may be a way to salvage this circuit, i liked the demo quite a bit!

i'm are looking for the place that contains the Fuzz, could will be deleted, but you could put a SPDT you activate .. not a bad idea ...

[Crontox102098]

Some know's how?

[Crontox102098]

well, the wah part is the part with the darlingtons...the lfo is just what sweeps it.
i think the fuzz is a groovy side effect of the circuit.

give it a little time...there may be a way to salvage this circuit, i liked the demo quite a bit!

I make without darlington, i try with Distortion and volume control of Electra distortion MOD.

[deadastronaut]

try the morley wah, its 'clean'....i used it on the ''lightwah''/ ''pulsewah''....also go with op amp lfo's, ........no ticking. 

they are just as easy to knock up, and are very tweakable........have fun!.

[Crontox102098]

try the morley wah, its 'clean'....i used it on the ''lightwah''/ ''pulsewah''....also go with op amp lfo's, ........no ticking. 

they are just as easy to knock up, and are very tweakable........have fun!.

I prefer the transistors, i trying a Sine lfo with transistors, but, this effect no ticking man, and i don't know why 

[Jdansti]

Your wah circuit is similar but not the same as Bevis's Colorsound Wah and R. G.'s Twin-T wah. Some minor modifications based on these circuits might help.

The Colorsound is a one transistor filter: http://www.beavisaudio.com/projects/colorsoundwah/index.htm

The Twin Tee wah is a two transistor circuit: http://www.geofex.com/
On R. G.'S page, go to "Technology of the" in the upper left corner of the page and click on "Wahs. Scroll down to the "Twin-T" schematic.

In these circuits, you would replace the control pot with the LDR. (A potential problem with any wah circuit is finding a LRD that approximates the range of a wah pot.)

That might take care of the fuzz problem.

To get a smoother pulse out of the 555, try the diode and capacitor filter shown below.



Try different caps or put several different values of caps on a rotary switch.

[Crontox102098]

Your wah circuit is similar but not the same as Bevis's Colorsound Wah and R. G.'s Twin-T wah. Some minor modifications based on these circuits might help.

The Colorsound is a one transistor filter: http://www.beavisaudio.com/projects/colorsoundwah/index.htm

The Twin Tee wah is a two transistor circuit: http://www.geofex.com/
On R. G.'S page, go to "Technology of the" in the upper left corner of the page and click on "Wahs. Scroll down to the "Twin-T" schematic.

In these circuits, you would replace the control pot with the LDR. (A potential problem with any wah circuit is finding a LRD that approximates the range of a wah pot.)

That might take care of the fuzz problem.

To get a smoother pulse out of the 555, try the diode and capacitor filter shown below.



Try different caps or put several different values of caps on a rotary switch.

I dont understand good :s i continue without fuzz in the effect :S 
But...
The pulse is more smooth

[Jdansti]

We might have a small language problem. 

I was suggesting that one of the circuits by Bevis or R. G. might help your distortion/fuzz problem, but you just said "I continue without fuzz in the effect".  This sounds like you do not have distortion now.

1) Did you solve the distortion/fuzz problem?  If so, how?

2) When you said "the pulse is more smooth", did you use the diode/capacitor filter in my post, or did you achieve smoothness in another way?

[Crontox102098]

We might have a small language problem. 

I was suggesting that one of the circuits by Bevis or R. G. might help your distortion/fuzz problem, but you just said "I continue without fuzz in the effect".  This sounds like you do not have distortion now.

1) Did you solve the distortion/fuzz problem?  If so, how?

2) When you said "the pulse is more smooth", did you use the diode/capacitor filter in my post, or did you achieve smoothness in another way?

1. Sorry, I was wrong, still I have the fuzz

2. YES

[Jdansti]

Ok. You might also try adjusting R3 in your schematic.  I'm not sure what voltage you should have at the collector, but you could place a 100k trimmer in place of R3 and adjust it to see if you can get a good sound.

[midwayfair]

Put a 100R between the 9V source and pins 8 & 4 of the 555. Put another 47uF cap on the "chip" side of the 100R.

This will at least reduce and may eliminate the LFO ticking. It electronically isolates the chip from the audio circuit.

There are also numerous IC-based LFOs that are known to be tick-free. (Like the one in Dead Astronaut's Light Wah.)

Of course, you could also use a simple phase inversion LFO like in EA Tremolo or Magnavibe and have zero risk of LFO ticking. It would produce a sine-wave pulse, reduce the parts count, and for extra fun would mean no ICs anywhere in sight.