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CVMod8 Main

Thorinair·Avalon-Harmonics·Modules/CVMod8/kicad/CVMod8_Main.kicad_pcb

CVMod8 Main PCB layout, top view — open source board by Thorinair
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About the CVMod8 Main PCB

CVMod8 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 100.8 × 108.6 mm, with 125 components from 28 distinct parts.

Other key parts include the TL074. By type, the board carries 55 resistors, 8 LEDs, 8 capacitors, 4 ICs and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

A collection of Avalon Harmonics branded synthesizer modules.

The module provides 8 channels of independent CV attenuation and offset controls.

Each channel can be used as a static slider controlled voltage source. The output voltage can be bipolar (-5V to +5V) or unipolar (0V to +6.67V) by adjusting jumpers on the back of the PCB. This can be adjusted for each channel individually.

Each channel also has a signal input with a corresponding attenuation knob. This means that a CV signal can be fed into the channel and then attenuated and offset using the slider. The output is available in the top most jacks.

Main components on the CVMod8 Main

TL074

CVMod8 Main bill of materials (BOM)

125 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
TL074
U1, U2, U3, U4
7
Conn_01x02_Male
J_FWD1, J_FWD2, J_FWD3, J_FWD4, J_FWD5, J_FWD6, J_FWD7
16
PJ301M-12
J_IN1, J_IN2, J_IN3, J_IN4, J_IN5, J_IN6, J_IN7, J_IN8 +8
8
Conn_01x03_Male
J_POL1, J_POL2, J_POL3, J_POL4, J_POL5, J_POL6, J_POL7, J_POL8
1
PWR_10_Pin
PWR1
8
B100k
P_ATT1, P_ATT2, P_ATT3, P_ATT4, P_ATT5, P_ATT6, P_ATT7, P_ATT8
8
B100k
P_OFFS1, P_OFFS2, P_OFFS3, P_OFFS4, P_OFFS5, P_OFFS6, P_OFFS7, P_OFFS8
8
LED (Bi)
LD_LED1, LD_LED2, LD_LED3, LD_LED4, LD_LED5, LD_LED6, LD_LED7, LD_LED8
2
1N4001
D1, D2
2
47UF
0.1uF
C1, C2
3
10UF
0.1uF
C3, C4, C5
1
47PF
0.1uF
C6
2
47uF
C7, C8
2
10K
1k
R11, R12
4
15K
1k
R13, R14, R15, R16
1
33K
1k
R17
1
47K
1k
R18
2
47K
100k
R22, R23
4
100K
100k
R24, R25, R26, R33
1
120K
100k
R27
Show 8 more
QtyPartRefs
1
160K
100k
R28
6
100k
R31, R32, R35, R36, R37, R38
1
240K
100k
R34
16
39k
R41, R42, R43, R44, R45, R46, R47, R48 +8
8
1k
R51, R52, R53, R54, R55, R56, R57, R58
3
100k
RN1, RN7, RN8
2
10K
100k
RN2, RN3
3
100K
100k
RN4, RN5, RN6

CVMod8 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.

CVMod8 Main: common questions

How big is the CVMod8 Main PCB?

The CVMod8 Main measures 100.8 × 108.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CVMod8 Main?

125 components, from 28 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 CVMod8 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 CVMod8 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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