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Noise Gate 230

Based on the DOD 230 Optical Noise Gate· 3 other boards clone it

Schematic

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

Check before you build · 1 value the reader of this schematic was not sure of

Ref	Value	Normalized	Type	Notes
Resistors 9
×6	1M	1M		two marked 1M*, one of them '(JUMPER)' in the first op-amp's feedback; read from the schematic by eye
×3	10k	10k		read from the schematic by eye
×2	220k	220k		read from the schematic by eye
×2	22k	22k		read from the schematic by eye
×1	470k	470k		read from the schematic by eye
×1	47k	47k		read from the schematic by eye
×1	1k	1k		marked 1k*; read from the schematic by eye
×1	4k7	4.7k		LED resistor; read from the schematic by eye
×1	100	100		supply; read from the schematic by eye
Capacitors 7
×3	100n	100n		one marked 100n*; read from the schematic by eye
×1	10n	10n		read from the schematic by eye
×1	120p	120p		read from the schematic by eye
×1	10u	10u		electrolytic; read from the schematic by eye
×1	1u	1u		electrolytic; read from the schematic by eye
×1	47u	47u		electrolytic, marked 47u*; read from the schematic by eye
×1	4u7	4.7u		electrolytic; read from the schematic by eye
Diodes 1
×1	1N4001	1N4001		read from the schematic by eye
Transistors 1
×1	2N3904	2N3904		read from the schematic by eye
ICs 2
×1	TL022	TL022		dual op-amp, both sections used; read from the schematic by eye
×1	LM358	LM358		dual op-amp, both sections used; read from the schematic by eye
Opto 1
×1	VTL5C2	VTL5C2		vactrol: LED and LDR halves drawn separately; read from the schematic by eye
Potentiometers 1
Threshold	B500k	B500k	Potentiometer	labelled 'THRASHOLD' on the drawing; read from the schematic by eye
Trimmers 1
Level	25k	25k		drawn as a trimmer, marked LEVEL*; read from the schematic by eye