Ioboard
About the Ioboard PCB
Ioboard is an open source PCB design by jypma, published on GitHub. It is a 2-layer board measuring 39.4 × 108 mm, with 65 components from 33 distinct parts.
By type, the board carries 19 resistors, 17 connectors, 12 diodes, 6 jumpers, 4 capacitors and 3 switches.
It belongs with the audio designs in this gallery.
From the project
Open hardware eurorack synth modules
- Screen - 2 Encoders - 2 bipolar CV inputs with Attenuverters and offset - On the MIDI variant, two attenuverters+offset are removed, to make space (only CV in for those). CV inputs: attenuators plus offset, offset positive only - 2 Gate inputs with trigger button. - 2 CV outputs (from MPC4822, SPI) - 2 Gate outputs (some I/O port)
Encoder 1: Select UI element Encoder 2: Change value (immediate)
Ioboard bill of materials (BOM)
65 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CV1_IN | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J1 |
| 1 | CV2_IN | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J2 |
| 1 | Conn_02x08_Odd_Even | PinHeader_2x08_P2.54mm_Vertical | J3 |
| 1 | SCREEN | PinSocket_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_MIDI | PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | Conn_02x03_Odd_Even | PinHeader_2x03_P2.54mm_Vertical | J6 |
| 1 | MIDI_THRU | Low-profile Minijack | J7 |
| 1 | MIDI_OUT | Low-profile Minijack | J8 |
| 1 | IN1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J9 |
| 1 | IN2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J10 |
| 1 | IN3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J11 |
| 1 | OUT1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J12 |
| 1 | OUT2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J13 |
| 1 | OUT3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J14 |
| 1 | OUTA | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J15 |
| 1 | OUTB | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles_Hole | J16 |
| 1 | MIDI_IN | Low-profile Minijack | J17 |
| 2 | 100k | Potentiometer_Alps_RK09K_Single_Vertical | CV_ADJ1, CV_ADJ2 |
| 2 | RotaryEncoder_Switch | RotaryEncoder_Alps_EC12E-Switch_Vertical_H20mm | ENC1, ENC2 |
| 6 | SolderJumper_3_Bridged12 | SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP1, JP2, JP3, JP4, JP5, JP6 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SW_IN1 | SW_PUSH_6mm_H13mm | SW1 |
| 1 | SW_IN2 | SW_PUSH_6mm_H13mm | SW2 |
| 1 | SW_IN3 | SW_PUSH_6mm_H13mm | SW3 |
| 3 | 1N5817W | D_SOD-123 | D1, D2, D3 |
| 4 | RB521S30 | D_SOD-523 | D4, D5, D7, D8 |
| 5 | LED_Dual_Bidirectional | LED_D3.0mm | D6, D9, D10, D11, D12 |
| 4 | 100n | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C4 |
| 2 | 33k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 4 | 270k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R5, R6 |
| 3 | 1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7, R9, R11 |
| 3 | 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R10, R12 |
| 2 | 3.3k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13, R15 |
| 5 | 3.9k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14, R16, R17, R18, R19 |
Ioboard design files
The KiCad project lives in the jypma/modsynth repository on GitHub; these links point at the commit this page was built from.
Ioboard: common questions
How big is the Ioboard PCB?
The Ioboard measures 39.4 × 108 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ioboard?
65 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the Ioboard design files?
From the jypma/modsynth repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Ioboard design in my own project?
The repository has no license, so all rights stay with jypma. Use it as a reference, and ask the author before reusing the design.
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