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Wow, perfect explanation, Thanks Chuck ! I definitely saved all your answer for my next encounter with a lfo : )

thanks ! Nothings seemed to be working correctly in this area : I had 8.8v at both sides of R10 0v at both sides of R11 R11 was well connected to the ground and Pin 3/6 R10 was well connected to the Pin 8 of the RC4558 and the pin 3 of L78L05 but not to R11 I soldered a wire between R11 and...

I investigate with a continuity test, and I have more precise questions : - How does the VREF works in the schematics ? Where does it come from ? Should it be the same electric point such as the ground ? Because in my build, on the RC4558 the input 3 and 6 are supposed to be VREF, i guess...

Alright ! So I couldn't find any formula to calculate the frequency range of the VCO. In fact I couldn't find any VCO with Capacitor in the Negative Feedback loop, any link or theory to feed me ? But, I found experimentaly the value of R18 and C10. So if you want a real slow LFO, in a kind...

I tried to increase R18 but it shortened the course of the rate potentiometer. So i tried to decrease R18, and It was pretty interesting : couldn't go slower but way faster, turning the LFO in an oscillator. 1kohm is fun. I increase C10 by adding other capacitor in parallel. And it's the good...

Hi, juste finished to build the chaos machine, sounds great ! Still mounted on a carboard for the moment because i'm waiting for the well sized enclosure, but very cool pedal ! I was wondering if the speed rate could be slower than what is permitted for the moment. I check this schematic...

Hi, this is my first post and my third build so pretty noob. I finished the Pitch Witch and it almost work, but there is no modulation in the pitch... I have bypass and FX Delay working but no pitching. It looks like the yellow LED tension is not modulated by the JRC4558 (I used RC4558D...