FuzzDog Hot Snake Boost User manual
Ho Snake Boos
Red Hot Treble Boost
...Careful now
Contents of this document are ©2018 Pedal Parts Ltd.
No reproduction permitted without the express written
permission of Pedal Parts Ltd. All rights reserved.
R1 220
R2 68
R3 8 2
R4 1M*
R5 2 2 (CLR)
C1 1n
C2 3n3
C3 68n
C4 47p
C5 10n
C6 47u elec
C7 47u elec
D1 1N4001
Q1 2N2222**
BOOST 10 B
HEAT 1 B
RANGE 500 A
Schematic + BOM
*R4 is an optional anti-pop resistor.
** See notes overleaf regarding pinout/orientation before placing.
The power and signal pads on the PCB
conform to the FuzzDog Direct Connection
format, so can be paired with the
appropriate daughterboard for quick and
easy offboard wiring. Check the separate
daughterboard document for details.
Be very careful when soldering the diode
and transistor. They’re very sensitive to
heat. You should use some kind of heat
sink (crocodile clip or reverse action
tweezers) on each leg as you solder them.
eep exposure to heat to a minimum
(under 2 seconds).
Snap the small metal tag off the pots so
they can be mounted flush in the box.
Positive (anode) legs of the electrolytic
caps go to the square pads.
C6 and C7 can be laid flat to the PCB as
shown on the cover image. This will give
more clearance in your enclosure.
Negative (cathode) legs of the diodes go to
the square pads.
The controls on this circuit are very
interactive. A little tweak here may require
another tweak there.
TRANSISTOR PINOUTS
Manufacturers can be very unhelpful
sometimes. Different versions of 2N2222
may have different pinouts. Check your
datasheet if sourcing your own parts.
If you’re building a FuzzDog kit, your
transistors will be one of the following:
PN2222 - these should be mounted as per
the component silkscreen on the PCB, i.e.
flat side of Q1 to bottom of board.
P2N2222 - these have the opposite pinout,
and should be reversed.
PCB layout ©2017 Pedal Parts Ltd.
Test the board!
UNDER NO CIRCUMSTANCES will roubleshoo ing help
be offered if you have skipped his s age. No excep ions.
Once you’ve finished the circuit it makes sense to test is before starting on the switch and
LED wiring. It’ll cut down troubleshooting time in the long run. If the circuit works at this
stage, but it doesn’t once you wire up the switch - guess what? You’ve probably made a
mistake with the switch.
Solder some nice, long lengths of wire to the board connections for 9V, GND, IN and OUT.
Connect IN and OUT to the jacks as shown. Connect all the GNDs together (twist them up
and add a small amount of solder to tack it). Connect the battery + lead to the 9V wire,
same method. Plug in. Go!
If it works, crack on and do your switch wiring. If not... aw man. At least you know the
problem is with the circuit. Find out why, get it working, THEN worry about the switch etc.
BATTERY
IN OUT
Your nice, new circuit board
INCLUDING WIRED POTS!!!!
IN 9V GND OUT
Wiring shown above will disconnect the battery when you remove the jack plug
from the input, and also when a DC plug is inserted.
The Board GND connections don’t all have to directly attach to the board. You
can run a couple of wires from the DC connector, one to the board, another to
the IN jack, then daisy chain that over to the OUT jack.
It doesn’t matter how they all connect, as long as they do.
This circuit is standard, Negative GND. Your power supply should be Tip
Negative / Sleeve Positive. That’s the same as your standard pedals (Boss etc),
and you can safely daisy-chain your supply to this pedal.
L
E
D
BOARD
OUT
BOARD
9V
BOARD
GND
BOARD
GND
BOARD
GND
BOARD
INPUT
BATTERY
+
IN
OUT
L
E
D
BOARD
GND
BOARD
LED+
+
Wire it up (if using a daughterboard please refer to the relevant document)
This template is a rough guide only. You should ensure correct marking of your
enclosure before drilling. You use this template at your own risk.
Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures.
FuzzD g.c .uk
Drilling template
Hamm nd 1590B
60 x 111 x 31mm
Rec mmended drill sizes:
P ts 7mm
Jacks 10mm
F tswitch 12mm
DC S cket 12mm
32mm
21mm
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