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Iosefka controlboard

GlobalSequence·iosefka·hardware/iosefka_controlboard/iosefka_controlboard.kicad_pcb

Iosefka controlboard PCB layout, top view — open source board by GlobalSequence
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About the Iosefka controlboard PCB

Iosefka controlboard is an open source PCB design by GlobalSequence, published on GitHub. It is a 2-layer board measuring 213 × 128.5 mm, with 74 components from 27 distinct parts.

Other key parts include the LM7805_TO220, LM7905_TO220, LT1054, SSI2140 and 24LC256. By type, the board carries 21 switches, 13 resistors, 9 diodes, 6 ICs, 6 capacitors and 4 connectors.

It belongs with the audio designs in this gallery.

From the project

hybrid digital analog synthesizer

Iosefka is a hybrid digital analog monophonic synthesizer consisting of the following parts:

- 2x wavetable oscillators, capable of interpolated morphing waveforms in the X and Y dimension along 256 hand-picked waveforms in a 16x16 layout - White noise generator - Sample-rate reduction and Bit-rate reduction effects - Loopback digital delay fed from VCA output with feedback and adjustable rate from >3 ms to ~683 ms

Iosefka controlboard, from the project README
From the project README

Main components on the Iosefka controlboard

LM7805_TO220LM7905_TO220LT1054SSI214024LC256LM13700

Iosefka controlboard bill of materials (BOM)

74 components, 27 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM7805_TO220
SSD1306_SPI
U1
1
LM7905_TO220
MCP23017_SP
U2
1
LT1054
MCP23017_SP
U3
1
SSI2140
4051
U4
1
24LC256
4051
U5
1
LM13700
H11L1
U14
2
Conn_01x10
J1, J2
1
DIN-5_180degree
J3
1
CONN_01X10
DIN-5_180degree
J6
14
10k
RV1, RV3, RV4, RV5, RV6, RV7, RV8, RV9 +6
1
100K
10k
RV2
1
RotaryEncoder_Switch
SW1
20
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +12
3
BAT85
LED
D1, D4, D5
4
LED
D2, D6, D7, D8
1
1N4001
LED
D3
1
1N4148W
D9
1
100U
100n
C1
1
220U
100n
C2
3
100N
100n
C3, C5, C6
Show 7 more
QtyPartRefs
1
10P
100n
C4
1
15K
10k
R1
5
15K
470R
R2, R4, R5, R7, R8
3
470R
R3, R6, R9
1
15K
220R
R10
1
270R
R52
2
220R
R53, R54

Iosefka controlboard design files

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

Iosefka controlboard: common questions

How big is the Iosefka controlboard PCB?

The Iosefka controlboard measures 213 × 128.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Iosefka controlboard?

74 components, from 27 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 Iosefka controlboard design files?

From the GlobalSequence/iosefka 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 Iosefka controlboard design in my own project?

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

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