Replaceing LFO circuit for little angel chorus.

[nguitar12]

Hi everyone recently I want to replace the LFO circuit for my little angel chorus.
I feed the pin 3 of the 555 circuit to pin 2 of pt2399 but it doesn't working.
Can someone please suggest  possible explanation to this?

[anchovie]

Which 555 circuit? Does it work on its own?

[samhay]

>Hi everyone recently I want to replace the LFO circuit for my little angel chorus.

Why?

[nguitar12]

Which 555 circuit? Does it work on its own?

Yes i attached a led and it will flash. I measure with the voltmeter and I can see the voltage swing from 0 to 9v.

[nguitar12]

>Hi everyone recently I want to replace the LFO circuit for my little angel chorus.

Why?

I want to modified the waveform. Original doesn't sound very smooth to me.

[samhay]

The LFO in the Little Angel should output a triangle(ish) waveform. I don't think you will do better (smoother) with a 555. The way the LFO modulates the PT2399 Vref is probably what you don't like.

How are you connecting the 555 to the PT2399? - a (partial) schematic would be useful.

[nguitar12]

The LFO in the Little Angel should output a triangle(ish) waveform. I don't think you will do better (smoother) with a 555. The way the LFO modulates the PT2399 Vref is probably what you don't like.

How are you connecting the 555 to the PT2399? - a (partial) schematic would be useful.

http://www.circuitdiagram.org/images/triangle-wave-generator-using-555.gif

I am connecting the output of 555 to the negative terminal of 10uf electrolytic cap  at pin 2 of the depth pot.
I don't think Little Angel should output a triangle waveform. It use 1 op amp only so theoretically it should be a square wave form smoother by a capacitor.