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CVMod4 Main

Thorinair·Avalon-Harmonics·Modules/CVMod4/kicad/CVMod4_Main.kicad_pcb

CVMod4 Main PCB layout, top view — open source board by Thorinair
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About the CVMod4 Main PCB

CVMod4 Main is an open source PCB design by Thorinair, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 50 × 108.6 mm, with 85 components from 29 distinct parts.

Other key parts include the TL074 and LM324. By type, the board carries 39 resistors, 10 capacitors, 6 ICs, 4 LEDs and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

A collection of Avalon Harmonics branded synthesizer modules.

4 channel CV attenuverter, offset and mixer

CVMod4 is functionally identical to the Avalon Harmonics CVMod8 V2, but provides 4 channels instead of 8, making it more compact for smaller cases. Additionally, it is Avalon Harmonics' first ever SMD module. Features a golden (ENIG coated) panel.

The module provides 4 channels of independent CV attenuverters and offset controls, as well as offset polarity switches and forward switches for mixing the channels together.

Main components on the CVMod4 Main

TL074LM324

CVMod4 Main bill of materials (BOM)

85 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
TL074
U1, U2, U3, U4
1
TL074
78L05
U5
1
LM324
79L05
U6
8
PJ301M-12
J_IN1, J_IN2, J_IN3, J_IN4, J_OUT1, J_OUT2, J_OUT3, J_OUT4
1
PWR_10_Pin
PWR1
4
B100k
P_ATN1, P_ATN2, P_ATN3, P_ATN4
4
B100k
P_OFS1, P_OFS2, P_OFS3, P_OFS4
7
SW_SPDT
SW_FWD1, SW_FWD2, SW_FWD3, SW_POL1, SW_POL2, SW_POL3, SW_POL4
4
LED (Bi)
LD1, LD2, LD3, LD4
2
1N4001
FM4001
D1, D2
2
47UF
47uF
C1, C2
3
10UF
0.1uF
C3, C4, C5
1
47PF
0.1uF
C6
4
0.1uF
C7, C8, C9, C10
2
1k
R1, R5
1
100
1k
R2
1
220
1k
R3
1
330
1k
R4
3
2.2K
1k
R6, R7, R8
1
2.2K
100k
R9
Show 9 more
QtyPartRefs
5
15K
100k
R10, R13, R14, R15, R16
2
10K
100k
R11, R12
1
33K
100k
R17
6
47K
100k
R18, R19, R20, R21, R22, R23
4
100K
100k
R24, R25, R26, R33
1
120K
100k
R27
1
160K
100k
R28
9
100k
R29, R30, R31, R32, R35, R36, R37, R38 +1
1
240K
100k
R34

CVMod4 Main design files

The KiCad project lives in the Thorinair/Avalon-Harmonics repository on GitHub; these links point at the commit this page was built from.

CVMod4 Main: common questions

How big is the CVMod4 Main PCB?

The CVMod4 Main measures 50 × 108.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CVMod4 Main?

85 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the CVMod4 Main design files?

From the Thorinair/Avalon-Harmonics repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the CVMod4 Main design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which Thorinair chose for the repository.

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