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Ilse

chairaudio·ILSE·mainboard/ilseREV2.kicad_pcb

Ilse PCB layout, top view — open source board by chairaudio
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About the Ilse PCB

Ilse is an open source PCB design by chairaudio, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 78.5 × 109.5 mm, with 88 components from 32 distinct parts.

Other key parts include the TL074. By type, the board carries 42 resistors, 13 capacitors, 7 connectors, 6 transistors, 5 diodes and 2 ICs.

It belongs with the audio designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

Analog Monophonic Synthesizer Module for Education

Ilse is designed as a low cost, easy to build, but still flexible and feature rich synthesizer. It is based on Syntherjacks single-chip synthesizer Totoro and extends the design for voltage control on filter, oscillators and LFO.

If you want to see the revision 2 of ILSE (as a reference if you have a REV 2 layout) make sure to check out the rev2 tag with git checkout tags/rev2

Ilse, from the project README
From the project README

Main components on the Ilse

TL074

Ilse bill of materials (BOM)

88 components, 32 distinct parts.

QtyPartRefs
2
TL074
U1, U2
3
BC559
Q1, Q2, Q3
3
BC548
Q4, Q5, Q6
1
OUT
J1
1
EURO RACK POWER
J2
1
CV Inputs
J3
1
1V/Oct
J4
1
Gate
J5
1
Cutoff
J6
1
Filter In
J7
2
9 V
BT1, BT2
1
Freq Gate
JP1
1
5kB
RV1
6
100kB
RV2, RV4, RV5, RV6, RV7, RV8
1
500
RV3
1
1MA
RV9
1
EURORACK_Cable
W1
2
LED Superbright
D1, D2
3
1N5818
D3, D4, D5
3
1u
C1, C5, C11
Show 12 more
QtyPartRefs
5
0.1u
C2, C6, C7, C8, C9
2
10n
C3, C4
1
1n
C10
2
10u
C12, C13
3
4k7
R1, R12, R34
8
47k
R2, R10, R11, R21, R22, R23, R29, R37
13
100k
R3, R4, R8, R13, R14, R17, R18, R20 +5
8
1k
R5, R6, R9, R16, R30, R33, R35, R41
1
22k
R7
1
1.5k
R15
7
10k
R19, R24, R25, R26, R32, R40, R42
1
2k2
R31

Ilse design files

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

Ilse: common questions

How big is the Ilse PCB?

The Ilse measures 78.5 × 109.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ilse?

88 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ilse design files?

From the chairaudio/ILSE repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ilse design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Earlier revisions in the repo: ilse

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