Enclosure not stated · 4 knobs

Marvellous Engine

Based on the Snake Oil Marvellous Engine· 1 other board clones it

Schematic

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

Ref	Value	Normalized	Type	Notes
Resistors 7
×1	470	470		read from the schematic by eye
×2	1k	1k		read from the schematic by eye
×1	2k2	2.2k		read from the schematic by eye
×1	4k7	4.7k		read from the schematic by eye
×1	10k	10k		read from the schematic by eye
×2	22k	22k		read from the schematic by eye
×3	1M	1M		read from the schematic by eye
Capacitors 9
×2	100p	100p		read from the schematic by eye
×1	1n	1n		read from the schematic by eye
×2	22n	22n		read from the schematic by eye
×1	47n	47n		read from the schematic by eye
×2	100n	100n		read from the schematic by eye
×1	220n	220n		read from the schematic by eye
×1	1u	1u		read from the schematic by eye
×1	10u	10u		electrolytic; read from the schematic by eye
×1	100u	100u		electrolytic; read from the schematic by eye
Diodes 2
×2	BAT41	BAT41		clipping; read from the schematic by eye
×1	1N5817	1N5817		reverse polarity; read from the schematic by eye
ICs 1
×1	4558	4558		dual op-amp, both sections used; read from the schematic by eye
Potentiometers 4
Gain	B100k	B100k	Potentiometer	read from the schematic by eye
Voice	C10k	C10k	Potentiometer	read from the schematic by eye
Tone	B25k	B25k	Potentiometer	read from the schematic by eye
Volume	B100k	B100k	Potentiometer	read from the schematic by eye
LEDs 1
×2	RED	RED		clipping LEDs; read from the schematic by eye