Chuck D. Bones
Circuit Wizard
This article picks up where the Fat Sandwich article leaves off.
Here's what I have at the moment. It's still a work in progress. The Fat Sandwich is kinda like 4 stacked pedals: Clean Boost -> DS-1 -> EQ -> Red Llama. I mainly attacked the EQ section and made the clipping diodes functional. I moved the CURVE trimpot to the front panel and retuned it to have a better feel. I also moved the DRIVE trimpot to the front panel. R40 & R41 were added to make the clipping more symmetric in the last two stages. Their values are still in flux. I raised the input impedance by increasing R27 and tweaked the biasing on Q4 & Q4. I added a variable freq treble cut at the end and named it PRESENCE. I'm currently experimenting with removing D2 & D5. After that, I'll try some alternate Tone networks between U1 & U2.
L-R: VOLUME - PRESENCE - DRIVE - TONE - SUSTAIN - BOTTOM
Here's what I have at the moment. It's still a work in progress. The Fat Sandwich is kinda like 4 stacked pedals: Clean Boost -> DS-1 -> EQ -> Red Llama. I mainly attacked the EQ section and made the clipping diodes functional. I moved the CURVE trimpot to the front panel and retuned it to have a better feel. I also moved the DRIVE trimpot to the front panel. R40 & R41 were added to make the clipping more symmetric in the last two stages. Their values are still in flux. I raised the input impedance by increasing R27 and tweaked the biasing on Q4 & Q4. I added a variable freq treble cut at the end and named it PRESENCE. I'm currently experimenting with removing D2 & D5. After that, I'll try some alternate Tone networks between U1 & U2.
![Chubby Sammich v0.2.png Chubby Sammich v0.2.png](https://forum.pedalpcb.com/data/attachments/59/59724-b7e0f9ee1dc68cd0af3ab797d44dd3ce.jpg)
L-R: VOLUME - PRESENCE - DRIVE - TONE - SUSTAIN - BOTTOM
![Chubby Sammich v0.2 breadboard 02.jpg Chubby Sammich v0.2 breadboard 02.jpg](https://forum.pedalpcb.com/data/attachments/59/59723-e84dc04dce49b25f4014ec7062e5ce6e.jpg)