HardLabs

VCO mki

DeMarco·DMH-VCO-40106·DMH_VCO_40106_PCB/DMH_VCO_40106_PCB.kicad_pcb

VCO mki PCB layout, top view — open source AVR/Arduino board by DeMarco
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About the VCO mki PCB

VCO mki is an open source AVR/Arduino PCB design by DeMarco, published on GitHub. It is a 2-layer board measuring 98 × 135 mm, with 147 components from 60 distinct parts.

Its main chip is the ATtiny4313-P, from the AVR/Arduino family. Other key parts include the 40106, TL074, TL072 and SM420561N. By type, the board carries 74 resistors, 20 capacitors, 13 diodes, 7 transistors, 6 ICs and 4 connectors.

From the project

VCO module based on the CD40106 Hex Inverter chip

Main components on the VCO mki

40106TL074TL072ATtiny4313-PSM420561N

VCO mki bill of materials (BOM)

147 components, 60 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
40106
U1
1
TL074
U2
1
TL072
TL074
U3
1
TL074
U4
1
ATtiny4313-P
U5
1
SM420561N
U6
1
BC558
Q1
3
BC548
Q2, Q3, Q4
2
2N3904
BC548
Q5, Q6
1
J113
Q7
1
Panel_GND
J10
1
IDC_02X08
IDC_02x08
J100
1
Conn_01x12
J150
1
AVR-ISP-6
J300
3
100K
100k
RV1, RV2, RV6
2
100k
RV3, RV4
1
1k
RV5
1
250K
100k
RV7
1
10K
10k
RV8
1
100K
100k
RV9
Show 40 more
QtyPartRefs
1
50K
50k
RV10
1
1M
RV11
2
100k
RV12, RV13
1
10k
RV14
3
SW_SPDT_321_OnOff
SW1, SW2, SW3
6
10K
10k
TH1, TH2, TH3, TH4, TH5, TH6
1
1N4148
D1
3
1N4148
D2, D3, D4
6
LED
D6, D7, D8, D9, D10, D11
1
SB140-
D13
2
SB140+
D14, D15
3
47UF
47uF
C1, C2, C9
7
100NF
100nF
C3, C4, C5, C6, C7, C8, C14
1
2.2NF
10nF
C10
2
1UF
1uF
C11, C13
1
2.2UF
2.2nF
C12
1
1nF
C15
5
100nF
C16, C17, C18, C19, C20
9
100K
100k
R1, R4, R7, R8, R9, R12, R25, R26 +1
1
33K
47k
R2
4
100K
68k
R3, R13, R17, R18
21
1k
R5, R20, R21, R24, R28, R44, R50, R60 +13
1
100K
3k3
R6
1
1K5
100k
R10
2
1M
R11, R43
1
68K
33k
R14
1
14K
100k
R15
1
47K
18k
R16
1
68K
47k
R19
4
10K
10k
R22, R23, R33, R34
2
2K2
2k2
R29, R32
1
390
R30
1
18K
18k
R31
2
10K
14k
R35, R36
13
100k
R37, R40, R41, R42, R46, R47, R48, R49 +5
1
510R
R38
1
300k
R39
1
33k
R45
3
68k
R51, R54, R57
2
18k
R52, R59

VCO mki design files

The KiCad project lives in the DeMarco/DMH-VCO-40106 repository on GitHub; these links point at the commit this page was built from.

VCO mki: common questions

What microcontroller does the VCO mki use?

The VCO mki is built around the ATtiny4313-P, from the AVR/Arduino family.

How big is the VCO mki PCB?

The VCO mki measures 98 × 135 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the VCO mki?

147 components, from 60 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 VCO mki design files?

From the DeMarco/DMH-VCO-40106 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the VCO mki design in my own project?

The repository has no license, so all rights stay with DeMarco. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the VCO mki without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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