What does CC1 mean in this schematic?

[squirrelboy]

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mikeyfarrow.github.io

It’s a clone of an electric mistress. I can’t figure out what CC1 is at all.

Thanks!!

 

[PedalBuilder]

It's a network flag, as are VCC, VDD, VRef, etc. It's basically a shorthand way of saying "connect all of these points" without having to draw a bunch of connection wires, which makes for a schematic that's easier to read.

 

[chris.knudson]

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mikeyfarrow.github.io

It’s a clone of an electric mistress. I can’t figure out what CC1 is at all.

Thanks!!

I don't know about this circuit, but typically CC1 and CC2 refer to pins A5 and B5 (respectively) on a USB-C connector.

 

[squirrelboy]

It's a network flag, as are VCC, VDD, VRef, etc. It's basically a shorthand way of saying "connect all of these points" without having to draw a bunch of connection wires, which makes for a schematic that's easier to read.

That was my understanding, but those points are all already connected via traces on the PCB. This is what I’m working with:

 

[benny_profane]

That was my understanding, but those points are all already connected via traces on the PCB. This is what I’m working with:

Right—the main purpose of the net designation is to make the schematic less cluttered. The board will have to have physical connections.

 

[squirrelboy]

Right—the main purpose of the net designation is to make the schematic less cluttered. The board will have to have physical connections.

Totally - but what do I do with that single pad that is labeled CC1 on the bottom left? The one that is next to all the other labeled pads?

 

[squirrelboy]

Totally - but what do I do with that single pad that is labeled CC1 on the bottom left? The one that is next to all the other labeled pads?

Here is a zoomed in picture of the PCB layout.

 

[benny_profane]

This seems to differ from other electric mistress schematics I’ve seen. That node is connected to the clock input of the CD4013. It may just be a test point for the VCO trim. Not entirely sure why that’s being brought out with the other supply pins. Do you have any other documentation? Is there a daughterboard?

 

[squirrelboy]

This seems to differ from other electric mistress schematics I’ve seen. That node is connected to the clock input of the CD4013. It may just be a test point for the VCO trim. Not entirely sure why that’s being brought out with the other supply pins. Do you have any other documentation? Is there a daughterboard?

The documentation I have is on this Github repository. I don't really know what any of this stuff is. I asked my brother to find me an electric mistress clone, and he found this one and then had the circuit boards fabricated.

My understanding is that it is based on Thomeeque's EM3207 mistress: https://thmq.mysteria.cz/em3207/build/EM3207_v1.1_Build_Instructions.pdf

 

[squirrelboy]

I just noticed that in Thomeeque's schematic and build instructions, he says the following:


So, I am thinking that CC1 might be for if you want to install a mod.

 

[benny_profane]

So, I am thinking that CC1 might be for if you want to install a mod.

Yep, that seems right. You’d install cap(s) with one leg on the switch and the other to ground and wire the switch common to that pad.