Akashic Guitar effects PCB lookup
FUZZVOLUMENPN/PNP (TOGGLE SWITCH)

125B · 3 knobs

PedalPCB· PCB070

Twin Face

Category
Fuzz
Controls
Fuzz · Volume · NPN/PNP (Toggle switch)
Price
$8.00in stock
Tags
125B

From the vendor

Overview

Toggle between NPN/PNP modes with the flick of a switch.

Finally a pedal that answers the question which fuzz should I have on my board. “Do I want the soft attack and warmth of Germanium PNP or the harder edges and sustain of the Silicon NPN?” With this you get to have both in a nice little package.

Independent bias controls for each pair allow you to combine Silicon and Germanium operation into one pedal.

When biasing the Twin Face, set your DMM to read DC voltages and place your black probe in the screw hole of your enclosure for ground and place your red probe on the collector of Q2. Adjust the trimmer on until you reach roughly 4.5V on the NPN side and -4.5V on the PNP side.

Onboard voltage inverter allows NPN or PNP operation from a standard center-negative 9VDC power supply.

No need for multiple power supplies or grounding issues when used in a daisy-chain.

Controls

• Fuzz – Adjusts the amount of fuzz

• Volume – Controls the output volume

• NPN/PNP (Toggle switch) – Toggles between NPN and PNP transistors

Specifications

• Onboard Voltage Inverter – Runs on standard 9VDC pedal power, no grounding issues in pedal chain

• Designed for a 125B enclosure with top-mounted jacks

Documentation

Schematic

The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 24 rows

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RefValueNormalizedTypeNotes
Resistors 9
R133K33k
R21K1k
R3470R470
R4100K100k
R533K33k
R61K1k
R7470R470
R8100K100k
R1004K74.7k
Capacitors 8
C12u22.2u
C210n10n
C320u20u
C410n10n
C520u20u
C62u22.2u
C10010u10u
C10147u47u
Diodes 1
D1001N58171N5817
ICs 1
IC100TC1044SCPATC1044SCPA
Potentiometers 2
FUZZB1KB1kPotentiometer
VOLUMEA500KA500kPotentiometer
Trimmers 2
NPNTRIM10K10kTrimmer
PNPTRIM10K10kTrimmer
Switches 1
SW14PDT4PDT