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ADSR

Desval27·FormantKO·modules/ADSR/ADSR.kicad_pcb

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

ADSR 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 82 components from 49 distinct parts.

Other key parts include the µA741C. By type, the board carries 31 connectors, 27 resistors, 7 diodes, 6 transformers, 5 ICs and 4 capacitors.

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.

- Add external gate input. This is normalized and will disconnect any existing internal gate bus assignment. - Added jumper to completly disable the external gate path. With the jumper in place the gate I/O functions the same as the original design.

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

- Default - Elecrow - FusionPCB - JLCPCB - PCBWay

ADSR, from the project README
From the project README

Main components on the ADSR

µA741C

ADSR bill of materials (BOM)

82 components, 49 distinct parts — part numbers from the project's BOM.

QtyPartRefs
5
µA741C
IC1, IC2, IC3, IC4, IC5
1
CardConnector
J1
1
ENV SELECT
J2
1
GATE SELECT
J3
1
EOS
J4
1
EXT GATE
J5
1
NO EXT GATE
J6
2
GND
J7, J26
1
P1.1
J8
1
P1.3
J9
1
P1.2
J10
1
P2.3
J11
1
P2.2
J12
1
P2.1
J13
1
P3.1
J14
1
P3.3
J15
1
P3.2
J16
1
P4.1
J17
1
P4.2
J18
1
P4.3
J19
Show 29 more
QtyPartRefs
1
S1A
S1a
J20
1
S1B
S1b
J21
1
S1M
S1m
J22
1
D6A
D6a
J23
1
D6K
D6k
J24
1
EOS
J25
3
1M
P1, P2, P3
1
10K
10k
P4
1
25K
25k
P5
1
CardBracket
MH1
1
MODE
S1
6
BC108C
T1, T2, T3, T4, T5, T6
5
1N4148
D1, D2, D3, D4, D5
1
ENV IND
D6
1
1N4148
D7
1
10N
10n
C1
1
10µ
C2
1
10µ
C3
1
10µ
C4
4
10K
10k
R1, R9, R23, R24
2
4K7
4k7
R2, R25
2
5K6
5k6
R3, R7
5
100K
100k
R4, R6, R8, R16, R18
4
33K
33k
R5, R10, R11, R22
3
470R
R12, R26, R27
2
1k
R13, R21
2
27K
27k
R14, R20
2
6K8
6k8
R15, R19
1
220R
R17

ADSR design files

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

ADSR: common questions

How big is the ADSR PCB?

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

How many components are on the ADSR?

82 components, from 49 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 ADSR 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 ADSR design in my own project?

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

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