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COM

Desval27·FormantKO·modules/COM/COM.kicad_pcb

COM PCB layout, top view — open source board by Desval27
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About the COM PCB

COM is an open source PCB design by Desval27, published on GitHub under the MIT license. It is a 2-layer board measuring 160 × 100 mm, with 85 components from 58 distinct parts.

Other key parts include the RC4136. By type, the board carries 37 connectors, 26 resistors, 12 capacitors, 5 diodes, 2 transformers and 1 IC.

It belongs with the audio designs in this gallery.

From the project

Knock-off of the Elektor Formant Synthesizer project with the initial goal of being quasi-authentic and secondary goal undecided. Probably tweaks of some kind.

- Change power & gate leds to not require the interface receiver board. - Use transistor drivers for both gate LEDs. - Add Gate2 LED and associated tranistor driver.

- Schematic - Assembly - Bill of Materials - Interactive Bill of Materials

- Default - Elecrow - FusionPCB - JLCPCB - PCBWay

COM, from the project README
From the project README

Main components on the COM

RC4136

COM bill of materials (BOM)

85 components, 58 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RC4136
IC1
1
CardConnector
J1
1
IS SELECT
J2
1
P1A.1
P1a.1
J3
1
P1A.2
P1a.2
J4
1
OUT 1
J5
1
OUT 2
J6
1
P1A.3
P1a.3
J7
1
P2.1
J8
1
P2.2
J9
1
P2.3
J10
1
OUT 2
J11
1
P3.1
J12
1
P3.2
J13
1
P3.3
J14
5
GND
J15, J20, J22, J28, J32
1
P1B.1
P1b.1
J16
1
P1B.2
P1b.2
J17
1
P1B.3
P1b.3
J18
1
OUT 1
J19
Show 38 more
QtyPartRefs
1
-15V
J21
1
5V LED
J23
1
+15V LED
J24
1
-15V LED
J25
1
GATE1 LED
J26
1
GATE2 LED
J27
1
P4.1
J29
1
P4.2
J30
1
P4.3
J31
1
4K7
4k7
P1
3
100K
100k
P2, P3, P4
1
250K
250k
P5
1
CardBracket
MH1
2
2N3904
T1, T2
1
TestPoint
TP1
1
-15V LED
D1
1
+5V LED
D2
1
+15V LED
D3
1
GATE1 LED
D4
1
GATE2 LED
D5
3
100N
100n
C1, C2, C9
2
10N
10n
C3, C4
2
39N
39n
C5, C6
1
15N
15n
C7
1
3N3
3n3
C8
3
680N
680n
C10, C11, C12
2
82K
82k
R1, R2
3
470R
R3, R8, R18
2
1K5
1k5
R4, R6
4
6K8
6k8
R5, R7, R11, R13
2
3K9
3k9
R9, R14
2
100K
100k
R10, R12
2
220K
220k
R15, R17
1
22K
22k
R16
1
4K7
4k7
R19
2
680R
R20, R22
3
150R
R21, R24, R27
2
10K
10k
R25, R26

COM design files

The KiCad project lives in the Desval27/FormantKO repository on GitHub; these links point at the commit this page was built from.

COM: common questions

How big is the COM PCB?

The COM measures 160 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the COM?

85 components, from 58 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 COM design files?

From the Desval27/FormantKO 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 COM design in my own project?

Yes, under the terms of its MIT license, which Desval27 chose for the repository.

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