RAT Distortion SMD

This assembled PCB is based on the RAT circuit with footprints for four DIP switches to customize clipping and bass.

COMPONENTS

Potentiometers
TONE   100k-A   100K OHM LOG POTENTIOMETER + DUST SEAL
VOL 100k-A   100K OHM LOG POTENTIOMETER + DUST SEAL
GAIN 100k-A   100K OHM LOG POTENTIOMETER + DUST SEAL

DIP Switch
DIP SWITCH 4 POSITIONS (Optional)

Connector
4 PINS XH-2.54 MALE CONNECTOR (Optional)

PCB

SCHEMATIC

DIP SWITCH SETTINGS

S1 and S2: Clipping diodes

S1 OFF, S2 OFF: one pair of LED diodes. Most transparent and least compressed sound.

S1 ON, S2 ON: one pair of silicon diodes. Original setting. More compressed sound.

S1 OFF, S2 ON: two pairs silicon diodes. More transparent and less compressed sound.

S3 and S4: Bass control (fat mod)

S3 OFF, S4 OFF: original bass setting.

S3 ON, S4 OFF: extra bass 1.

S3 OFF, S4 ON: extra bass 2.

S3 ON, S4 ON: extra bass 3.