TC Electronic - MojoMojo

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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FeVeR2112
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Post by FeVeR2112 »

I snapped some shots for you all.... I have not attempted to trace it yet but will have the pedal for some time and can answer questions next week.

https://drive.google.com/drive/folders/ ... sp=sharing

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FeVeR2112
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Post by FeVeR2112 »

also.... here are some values so far:

R1 105
R2 4321
R3 1022
R4 1003
R5 4702
R6 1002
R7 3901
R8 3301
R9 1002
R10 3302
R11 1802
R12
R13 392
R14 3303
R15 0
R16
R17 1001
R18
R19 4701
R20 1002
R21 1502
R22 1502
R23 1001
R24
R25 1003
R26 1000
R27 1001
R28 1001
R29 1002
R30 1003
R31 1002
R32 1002
R33 Omitted
R34 Omitted
R35 Omitted
R36
R37 Omitted
R38
R39 10R0
R40
R41 Omitted
R42 1000
R43 3301
R44 3301
R45 Omitted
R46 1R00

C1
C2
C3
C4 10-16S-Y47
C5
C6 104
C7 Omitted
C8
C9 10-16S-Y47
C10
C11 1-50S-747
C12
C13
C14
C15 1-50S-747
C16 10-16S-Y47
C17
C18
C19
C20 47uJ100
C21 10-16S-Y47
C22
C23
C24 100uF-25V
C25
C26
C27
C28 Omitted
C29 Omitted
C30 Omitted
C31
C32
C33
C34
C35
C36
C37
C38 10-16S-Y47

IC1
IC2 33178-PNHC
IC3 33178-PNHC
IC4 33178-PNHC
IC5 H11F1-709Q

RP1 B50K
RP2 B50K
RP3 A10K
RP4 C100K

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alexradium
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Post by alexradium »

no reason to spend time reversing it,its 35 used in my country.
For fun?for 35 bucks you can have much more fun with other activities...

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clintrubber
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Post by clintrubber »

alexradium wrote:no reason to spend time reversing it,its 35 used in my country.
For fun?for 35 bucks you can have much more fun with other activities...
I understand what you say, valid remark. But reversing also serves the purpose of understanding what's going on in the circuit, to learn from it.
That sounds like a lame excuse, often abused :lol: but it can sure be true.

And/or seeing the schematic to eventually mod it (I have one, and it's not on my board).

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FeVeR2112
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Post by FeVeR2112 »

Its about what makes it tick.... I doubt I would make a clone for the money to buy a used or even a new one. It is more the interest in the circuit and any cool ways to jam more in a 1590B (or A)....

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roseblood11
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Post by roseblood11 »

Does anybody have a schematic?

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Optical
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Post by Optical »

I'm only speculating based on what I see on he component layout, but it looks to be a tweaked RC booster with opamp buffers.
4 clipping diodes in the feedback loop; baxandall tone controls.

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Chugs
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Post by Chugs »

My guess is same topology as TC Dark Matter with different components values. Schematic for the Dark Matter: https://www.freestompboxes.org/viewtopic ... er#p270842

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roseblood11
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Post by roseblood11 »

Bump

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Silent Fly
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Post by Silent Fly »

roseblood11 wrote:Does anybody have a schematic?
I checked the MojoMojo a while ago and it looked very similar to the Dark Matter. I suspect they use the same PCB. Your best bet is probably use the Dark Matter schematic and tweak it.

When I examined the MojoMojo, I used this list and I added a couple of values I got from unit I examined.

Code: Select all

R1 105
R2 4321
R3 1022
R4 1003
R5 4702
R6 1002
R7 3901
R8 3301
R9 1002
R10 3302
R11 1802
R12
R13 392
R14 3303
R15 0
R16
R17 1001
R18
R19 4701
R20 1002
R21 1502
R22 1502
R23 1001
R24
R25 1003
R26 1000
R27 1001
R28 1001
R29 1002
R30 1003
R31 1002
R32 1002
R33 Omitted
R34 Omitted
R35 Omitted
R36
R37 Omitted
R38
R39 10R0
R40
R41 Omitted
R42 1000
R43 3301
R44 3301
R45 Omitted
R46 1R00

C1
C2
C3
C4 10-16S-Y47
C5
C6 104
C7 Omitted
C8
C9 10-16S-Y47
C10 measured: 41.2pF
C11 1-50S-747
C12
C13
C14 1n
C15 1-50S-747
C16 10-16S-Y47
C17
C18
C19
C20 47uJ100
C21 10-16S-Y47
C22
C23
C24 100uF-25V
C25
C26
C27
C28 Omitted
C29 Omitted
C30 Omitted
C31
C32
C33
C34
C35
C36
C37 measured: 211.5pF
C38 10-16S-Y47

IC1
IC2 33178-PNHC
IC3 33178-PNHC
IC4 33178-PNHC
IC5 H11F1-709Q

RP1 B50K
RP2 B50K
RP3 A10K
RP4 C100K
"Remember - all I am offering is the truth, nothing more". Morpheus

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Xianinsacto
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Post by Xianinsacto »

Image

Is this helpful?

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roseblood11
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Post by roseblood11 »

Did you draw this?

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FeVeR2112
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Post by FeVeR2112 »

That schem was posted on Reddit. Here is the link


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