Enclosure not stated · 3 knobs

Mad Professor Sweet Honey Overdrive

Based on the Mad Professor Sweet Honey Overdrive· 9 other boards clone it

Category: Overdrive
Controls: Drive · Focus · Volume
Price: see vendor
Also as: Vero layout · from Revolution Deux
Tags: freestompboxes.org trace

Read the post at Revolution Deux Schematic image freestompboxes.org thread Vero layout

From the vendor

A touch-sensitive medium-gain overdrive designed by Bjorn Juhl (BJFe) for Mad Professor, in the vein of his Honey Bee. An OP275 gain stage with red LEDs clipping in its feedback loop feeds a 1N4007 diode clipper and a passive network with the Focus control, which sets feel, dynamics and overall EQ, then a second op amp stage with LED clipping and the Volume pot.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 44 rows

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Ref	Value	Normalized	Type	Notes
Resistors 18
R1	1K	1k		LED resistor; read from the schematic by eye
R2	51	51		power filter; read from the schematic by eye
R3	1M	1M		read from the schematic by eye
R4	47K	47k		read from the schematic by eye
R5	360K	360k		read from the schematic by eye
R6	47K	47k		read from the schematic by eye
R7	1M	1M		read from the schematic by eye
R8	6.8K	6.8k		read from the schematic by eye
R9	3K	3k		read from the schematic by eye
R10	13.7K	13.7k		read from the schematic by eye
R11	2.61K	2.61k		read from the schematic by eye
R12	10K	10k		read from the schematic by eye
R13	2K	2k		read from the schematic by eye
R14	47K	47k		read from the schematic by eye
R15	5.6K	5.6k		read from the schematic by eye
R16	150K	150k		read from the schematic by eye
R17	1K	1k		read from the schematic by eye
R18	5.6K	5.6k		read from the schematic by eye
Capacitors 15
C1	4.7n	4.7n		read from the schematic by eye
C2	22n	22n		read from the schematic by eye
C3	4.7n	4.7n		read from the schematic by eye
C4	1n	1n		read from the schematic by eye
C5	22n	22n		read from the schematic by eye
C6	22n	22n		read from the schematic by eye
C7	4.7n	4.7n		read from the schematic by eye
C8	220n	220n		read from the schematic by eye
C9	1u	1u		electrolytic; read from the schematic by eye
C10	22u	22u		electrolytic; read from the schematic by eye
C11	22u	22u		electrolytic; read from the schematic by eye
C12	100u	100u		electrolytic; read from the schematic by eye
C13	1u	1u		electrolytic; read from the schematic by eye
C14	22u	22u		electrolytic; read from the schematic by eye
C15	100p	100p		read from the schematic by eye
Diodes 4
D1	5.1V zener	5V1		in the LED line; read from the schematic by eye
D2	1N4007	1N4007		read from the schematic by eye
D6	1N4007	1N4007		clipping; read from the schematic by eye
D7	1N4007	1N4007		clipping; read from the schematic by eye
ICs 1
IC1	OP275	OP275		read from the schematic by eye
Potentiometers 3
Drive	A500K	A500k	Potentiometer	read from the schematic by eye
Focus	B50K	B50k	Potentiometer	read from the schematic by eye
Volume	B50K	B50k	Potentiometer	read from the schematic by eye
LEDs 3
D3	LED	LED		3mm red, clipping; read from the schematic by eye
D4	LED	LED		3mm red, clipping; read from the schematic by eye
D5	LED	LED		3mm red, clipping; read from the schematic by eye

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