Mad Professor - Simble  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
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Lithium_Grim
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Post by Lithium_Grim »

swt wrote: 20 Jul 2020, 21:16 What's the purpose of those parallel caps? C12 & c13? I'm asking because if you connect c12 to accent 1 and leave c13 as is...it works as a high presence filter. Did someone try this?
Mostly you put 2 caps in parallel to get a value which is not (at all) available or very expensive to buy. In this case they form a replacement cap of 267nF which is a close one to the not that standard in (e27) 270n caps. Sometimes it is cheaper for manufacturing to use e12 values when outsourcing to... china :)

But if you want to safe space... use a 270n

matt239
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Post by matt239 »

So, what do the tone controls do?
It sounds different than zendrive to me. It has a few extra parts, yes?

rtcustom
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Post by rtcustom »

matt239 wrote: 10 Aug 2020, 01:57 So, what do the tone controls do?
If you had just tried, you would have realized that ACCENT works like a PRESENCE knob, and CONTOUR works like a BRIGHTNESS or classic "tone" control! ;)
matt239 wrote: 10 Aug 2020, 01:57 It sounds different than zendrive to me. It has a few extra parts, yes?
Sounds very similar, and yes, It has a few extra parts more than Zendrive! ;)

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VitaliiBobrov
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Post by VitaliiBobrov »

I've created a repo with KiCad source files: schematic and PCB 👇
https://github.com/vitaliy-bobrov/simble-overdrive

Interactive BOM 👉 https://vitaliy-bobrov.github.io/simble-overdrive/

The PCB is verified (v1.0), repo contains a slightly updated one (v1.1).

Shots of my build 😎
https://photos.app.goo.gl/1UWHBhjtgndBmv3w5

cbriere
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Post by cbriere »


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VitaliiBobrov
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Post by VitaliiBobrov »

cbriere wrote: 27 Sep 2020, 15:20 check this:
https://www.pedalpcb.com/product/symbolicod/
I've seen this before, but right now it takes ages to get orders from the US to EU, that's why I've created own PCB layout and ordered it. Another thing, I've placed all controls the same way as it was on Mad Professor version of the pedal.

cbriere
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Post by cbriere »

I've seen this before, but right now it takes ages to get orders from the US to EU, that's why I've created own PCB layout and ordered it. Another thing, I've placed all controls the same way as it was on Mad Professor version of the pedal.
[/quote]

make sense. You probably order from china, it is preatty fast indeed for 10 pcb and cost not that much. :applause:

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