Enclosure not stated · 4 knobs

Mantra

Based on the Blackout Effectors Mantra· 7 other boards clone it

Schematic

The schematic image is on the project page. Open it at PCBWay.

Ref	Value	Normalized	Type	Notes
Resistors 7
×9	10k	10k		read from the schematic by eye
×6	2M2	2.2M		read from the schematic by eye
×3	100k	100k		read from the schematic by eye
×3	470k	470k		read from the schematic by eye
×1	1M	1M		read from the schematic by eye
×1	390k	390k		read from the schematic by eye
×1	4k7	4.7k		LED resistor; read from the schematic by eye
Capacitors 10
×5	10n	10n		read from the schematic by eye
×4	100n	100n		read from the schematic by eye
×3	10u	10u		electrolytic; read from the schematic by eye
×2	47p	47p		read from the schematic by eye
×2	3n3	3.3n		read from the schematic by eye
×1	470p	470p		read from the schematic by eye
×1	680p	680p		read from the schematic by eye
×1	1n	1n		read from the schematic by eye
×1	22u	22u		electrolytic; read from the schematic by eye
×1	100u	100u		electrolytic; read from the schematic by eye
Diodes 2
×2	9V1	9V1		zener, gate to source of each MOSFET; read from the schematic by eye
×1	1N5817	1N5817		reverse-polarity protection; read from the schematic by eye
Transistors 2
×2	2N7000	2N7000		MOSFET gain stages; read from the schematic by eye
×2	J201	J201		JFET buffers; read from the schematic by eye
Potentiometers 4
Gain	A100k	A100k	Potentiometer	read from the schematic by eye
Treble	A100k	A100k	Potentiometer	read from the schematic by eye
Bass	A100k	A100k	Potentiometer	read from the schematic by eye
Vol	A100k	A100k	Potentiometer	read from the schematic by eye
Trimmers 1
×2	150k	150k		J201 drain trimmers, wired as variable resistors; read from the schematic by eye