Schematic for VCA Audio Compressor: This is a diode-based VCA...

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https://cdn2.flux.ai/flux-comment-files/files/commentFileId-d3ab4090e45ebd49b0fa...

olasubomiborishade

Schematic updates:

A 4-LED gain reduction meter
No sidechain
Increased attack potentiometer by x2

olasubomiborishade

https://cdn2.flux.ai/flux-comment-files/files/commentFileId-d3ab4090e45ebd49b0fa7e3a04cba4c9629d2b0dd988abed397598299cbe2b15.png?GoogleAccessId=graviton-mvp%40appspot.gserviceaccount.com&Expires=4877101841&Signature=Zfq5RpwXlUtnYvCxMbFQrfbTcveO%2FwrAermkUo7JcIfKv2sqeO6v1OoHLl3NngG%2Frum%2B%2FNX72BRiwncroA1NKITeINP2zsq8YpQusUyoMyBv4laXIF11GSXgR5AMzarECAQ2xiyneTMWRP5hWGI3aVqYxPM6B4Msz3iXfn0Ii2iHrwkFnjhpyQoFKcAf6BSh8nxDWskTowepe9YES%2FVtJF20tJhTNGvU3qluw7W9w3HHkgCxzQCEBA%2F4LzLYkfWWkh05uSQUPopoFX00ZJBherBB%2F%2BRMznyGNfrYrCoRN6HB45RyNNyeEfk%2Frf1OKtd99488hXaYpbq0tIBWjOn0vQ%3D%3D

Circuit Schematic

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Resistance

100k Ω

Comparator to Control Voltage

12V

Resistance

10k Ω

Buffer to VCA–

D19

12V

D10

12V

R35

Resistance

10k Ω

Capacitance

1.5u F

Threshold

Resistance

10k Ω

Resistance

100k Ω

R29

Resistance

4.7k Ω

Diode-string Output

R27

Resistance

33k Ω

Release

R15

Resistance

10k Ω

VCA Output Correction

R11

Resistance

470k Ω

R28

Resistance

4.7k Ω

R25

Resistance

33k Ω

Output Gain

Resistance

100k Ω

D11

Release

Resistance

1M Ω

R18

Resistance

100k Ω

VCA Output Correction

R13

Resistance

100k Ω

Resistance

100k Ω

Comparator to Control Voltage

Capacitance

680p F

12V

Attack

Resistance

1M Ω

Resistance

100k Ω

R17

Resistance

100k Ω

Diode-string Output

R34

Resistance

10k Ω

R19

Resistance

10k Ω

R16

Resistance

100 Ω

Resistance

100k Ω

Capacitance

1.5u F

Control Voltage to VCA+

R20

Resistance

47k Ω

Control Voltage to VCA+

D16

D17

D21

R24

Resistance

220k Ω

R21

Resistance

33k Ω

Capacitance

220u F

Resistance

100k Ω

R23

Resistance

33k Ω

R32

Resistance

100k Ω

-12V

Capacitance

10u F

R33

Resistance

20k Ω

Control Voltage to Buffer

Capacitance

1.5u F

R12

Resistance

470k Ω

R14

Generic Resistor

Resistance

10k Ω

R30

Resistance

4.7k Ω

Resistance

100k Ω

Gain Reduction Meter

VCA Output Correction

Release

Input Gain

Resistance

20k Ω

R26

Resistance

330k Ω

D18

Ratio

Resistance

100k Ω

Buffer to VCA–

-12V

Capacitance

220p F

R10

Resistance

10k Ω

-12V

R37

Resistance

50 Ω

-12V

R31

Resistance

4.7k Ω

R36

Resistance

50 Ω

D20

Resistance

2k Ω

R22

Resistance

120k Ω

Attack Mode Switch

Capacitance

100µ F

1 Buffer || 2 VCA

1 Comparator || 2 Control Voltage

Inverter

D12

End of Life

12V

1 Peak Detector || 2 Full-wave Rectifier || 3 VCA Output Correction || 4 Make-up Gain

End of Life

Inductance

68u H

Reviews

Electrical Rule Checks

Duplicate Designators

Reports components with identical designators.

No-Connect Violation

Reports no-connect pins that are connected.

Missing Power • 1

	Component
	LM2577SX-ADJ/NOPB Inverter

Single Pin Nets • 1

	Component
	1 Comparator \|\| 2 Control Voltage:VCC+

Missing Designator

Reports components without a designator.

Design Rule Checks

Overlapping Copper • 15

Des	Net	Des	Net
Q7:E	GND	Trace f2ce	Net 38
Trace 998a	GND	Via	Net 61
Trace 3690	Net 1	Inverter:VIN	Net 61
Trace 3690	Net 1	Trace 706d	Net 61
Via	Net 35	Trace 3214	Net 32
Trace 88f0	Net 39	Q8:C	Net 42
Trace 7339	Net 46	Via	Net 49
Release:CCW	Net 51	Trace 4ccf	Net 53
Release:WIPER	Net 51	Trace 4ccf	Net 53
Inverter:SW	Net 59	Trace 8ab8	Net 61
Inverter:SW	Net 59	Trace 706d	Net 61
1 Buffer \|\| 2 VCA:VCC+	Net 61	Trace 8863	Net 56
Inverter:VIN	Net 61	Trace b4b6	Net 1
Trace 25e8	Net 61	Trace 3690	Net 1
Via	Net 61	Trace 998a	GND

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides

Reports components that have been modified using the "!important" flag.

Airwires • 3

	Designators	Net
	R27:P2, Trace 88f0:Trace 88f0	Net 39
	Via:Via, Trace 4ccf:Trace 4ccf	Net 53
	Trace 8863:Trace 8863, Trace f50c:Trace f50c	Net 56

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper • 36

	Name
	Trace 5222
	Trace a8a2
	Trace d7a9
	Trace ee71
	Trace 6b52
	Trace e225
	Trace 2954
	Trace 4ccf
	Trace 774e
	Trace b48d
	Trace db3e
	Trace e81d
	Trace 1ba4
	Trace 1ea7
	Trace 0111
	Trace 9982
	Trace 00f4, Trace d907
	Trace 22b6
	Trace 3d92
	Trace aad4
	Trace dbee
	Trace 2f77, Trace c1e9
	Trace 432e
	Trace 993f
	Trace c140
	Trace 0543
	Trace 2ee2
	Trace f1ba
	Trace 66d9
	Trace 592d
	Trace 86db
	Trace e695
	Trace 183f
	Trace f78e
	Trace 1f1d
	Trace b715

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Missing Footprints

Reports components that need a footprint but don't have one.

Manufacturing

Manufacturer Part Number • 49

	Designator	MPN
	C1	None
	C2	None
	C3	None
	C4	None
	C5	None
	C6	None
	C7	None
	D18	None
	D19	None
	D20	None
	D21	None
	L1	None
	R1	None
	R2	None
	R3	None
	R4	None
	R5	None
	R6	None
	R7	None
	R8	None
	R9	None
	R10	None
	R11	None
	R12	None
	R13	None
	R14	None
	R15	None
	R16	None
	R17	None
	R18	None
	R19	None
	R20	None
	R21	None
	R22	None
	R23	None
	R24	None
	R25	None
	R26	None
	R27	None
	R28	None
	R29	None
	R30	None
	R31	None
	R32	None
	R33	None
	R34	None
	R35	None
	R36	None
	R37	None

Parts Available

Beta

Checks that all components are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Inspect

VCA Audio Compressor

Controls

Properties

Availability & Pricing

Distributor		Qty 1
	Arrow	$96.72–$145.71
	Digi-Key	$135.62–$168.63
	LCSC	$30.77–$98.86
	Mouser	$130.17–$146.13
	Verical	$116.42–$147.14

Assets

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