Enclosure not stated · 2 knobs

Compressor 280 LDR (TonePad)

Based on the DOD 280 Compressor· 5 other boards clone it

Schematic

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

Ref	Value	Normalized	Type	Notes
Resistors 7
×3	22k	22k		read from the schematic by eye
×2	1M	1M		read from the schematic by eye
×1	470k	470k		read from the schematic by eye
×2	220k	220k		read from the schematic by eye
×2	100k	100k		read from the schematic by eye
×1	10k	10k		read from the schematic by eye
×2	4k7	4.7k		one for the LDR's LED, one for the power LED; read from the schematic by eye
Capacitors 5
×4	47n	47n		read from the schematic by eye
×1	10n	10n		read from the schematic by eye
×1	100u	100u		electrolytic; read from the schematic by eye
×1	47u	47u		electrolytic; read from the schematic by eye
×1	10u	10u		electrolytic; read from the schematic by eye
Diodes 1
×1	1N4001	1N4001		read from the schematic by eye
Transistors 1
×2	PN4124	PN4124		rectifier pair driving the LED; read from the schematic by eye
ICs 1
×1	LM358	LM358		dual op-amp, both halves used; read from the schematic by eye
Opto 1
×1	LDR	LDR		paired with the LED; read from the schematic by eye
Potentiometers 2
Comp	B500k	B500k	Potentiometer	read from the schematic by eye
Output	A100k	A100k	Potentiometer	read from the schematic by eye
LEDs 1
×1	LED	LED		drives the LDR (homemade vactrol); read from the schematic by eye