Angry Carlos

Based JHS Angry Charlie / M-audio Crunch Box

Distortion - Overdrive

By PCB Guitar mania Mania

Project link

SW1
9V GND
C3 C4

D1
D2
1 1
C5

VOL
GAIN
PRESC ENC E
D8

D6
D7

D5
C7
1
C6

TONE

C12
D4

C9
C11

C10
1

C13

C8
C1
C2
IN GND. CT RL
OUT

LED

The Angry Carlos has been inspired on pedals such as JHS’s Angry Charlie and M-
Audio’s Cruch Box as one of the best Marshall in a box.

 Ready to be wired as True Bypass.

 Compact design, fits on a 1590b enclosure.
 Versatile to build different versions of this classic drive.
 Diode toggle selector on board.

Page 1 of 4
Angry Ca
By PCB Guitar Mania
BOM
Resistors Capacitors
R-LED 2K7-4K7 C1 22n
R1 1m C2 1n
R2 1k C3 100pf
R3 1m C4 220n
R4 1k C5 100n
R5 1k C6 100pf
R6 10k C7 2.2uf Electro
R7 1m C8 22nf
R8 470r C9 22nf
R9 22k C10 10uf Electro
R10 22k C11 100n
C12 100uf Electro
Potentiometers C13* 100nf (optional)*
PRESCENCE B- 25k
TONE C- 10k Diodes
VOL A- 100k D1 Red Led 3mm
GAIN B- 100K D2 Red Led 3mm
D4 1n5817
Switches D5** Builder choice
SW1 SPDT ON-OFF-ON D6** Builder choice
D7** Builder choice
IC D8** Builder choice
IC1 LM833

C13* Leave it unpopulated for the M-audio Crunch box mode.

D5 to D8** In this project I included space to fit 4 diodes, as alternative clipping options.
Although I found that most of the diodes might be a bit too compressed, is great to experiment
with different LED combinations and colors.
If you wanna use only a two diodes instead of four, you MUST place jumpers on the place for
D7 and D8, otherwise the diodes wont clip.

General Building notes

To populate the PCB it’s recommended to follow this order.

1. Resistors & diodes

2. IC Sockets (set up the proper IC at last)
Page 2 of 4
Angry Ca
By PCB Guitar Mania
 3. Capacitors, starting with the smaller ones and the ceramic ones.
4. Electrolytic capacitors (always check the polarity)
5. Transistors
6. Wires
7. Potentiometers
8. Off board wiring

Off Board Wiring

Drilling the enclosure

This Project has been planned to fit into a 1590B enclosure type (112x60x31mm)

Check the Attached “Drilling templates” to drill the box properly. The files are on Scale 1:1,
ready to print in a A4 page.

Page 3 of 4
Angry Ca
By PCB Guitar Mania
Schematic
VB

VB

R3

PRESCENCE
5 IC1_B

C7
IN R2 R8 TONE
3 IC1_A 7
R6

1
1 6

C13
C1 3

2
2

C8
R1

2
C2
3
1

VOL
2
C6 GND GND

C5
GND GND R7 OUT
C3

C9
1

2
R4

1
GND

D2
GAIN GND

D1
R5
C4

3
SW1
GND

2
GND VB

R9

R-LED
C12 9V

IC1_PWR
R10

C11
C10

GND.

4
GND

LED
CTRL
GND

Page 4 of 4
Angry Ca
By PCB Guitar Mania