Io board
About the Io board
Io board is an open source PCB design by thehiddendatacentre, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 80 × 100 mm, with 95 components from 34 distinct parts.
Other key parts include the TL074. By type, the board carries 39 resistors, 19 connectors, 10 diodes, 9 transistors, 6 capacitors and 3 switches.
It belongs with the audio designs in this gallery.
From the project
Digital Sine Wave Generator Eurorack Module
Main components on the Io board
Io board bill of materials (BOM)
95 components, 34 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 | DIP-14_W7.62mm_Socket_LongPads | U3 |
| 9 | 2N3904 | TO-92_Inline | Q1, Q2, Q5, Q6, Q7, Q8, Q9, Q10 +1 |
| 1 | STRB1 | AudioJack_WQP518MA | J4 |
| 1 | STRB2 | AudioJack_WQP518MA | J5 |
| 1 | Osc1 | AudioJack_WQP518MA | J6 |
| 1 | Sin1 | AudioJack_WQP518MA | J7 |
| 1 | Rung1 | AudioJack_WQP518MA | J8 |
| 1 | Gate1 | AudioJack_WQP518MA | J9 |
| 1 | RST1 | AudioJack_WQP518MA | J10 |
| 1 | D1 | AudioJack_WQP518MA | J11 |
| 1 | Osc2 | AudioJack_WQP518MA | J12 |
| 1 | Rung2 | AudioJack_WQP518MA | J13 |
| 1 | Sin2 | AudioJack_WQP518MA | J14 |
| 1 | Gate2 | AudioJack_WQP518MA | J15 |
| 1 | Ring | AudioJack_WQP518MA | J16 |
| 2 | ~ | PinHeader_1x12_P2.54mm_Vertical | J17, J20 |
| 1 | RST2 | AudioJack_WQP518MA | J18 |
| 1 | D2 | AudioJack_WQP518MA | J19 |
| 1 | CV1 | AudioJack_WQP518MA | J21 |
| 1 | CV2 | AudioJack_WQP518MA | J22 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 10k | Potentiometer_Alpha_R0904N | CVR1, CVR2, FREQ1, FREQ2 |
| 3 | SW_SPDT | Miniature_Switch_SPDT_2.54MM | SW1, SW2, SW3 |
| 4 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | TH1, TH2, TH3, TH4 |
| 2 | LED | LED_D3.0mm | D1, D2 |
| 6 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D5, D6, D7, D8, D9, D10 |
| 2 | BAT42 | D_DO-35_SOD27_P7.62mm_Horizontal | D13, D14 |
| 2 | 1nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C3 |
| 2 | 100nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C4 |
| 2 | 10nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C14, C15 |
| 20 | 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R20, R25, R39, R40, R41, R42, R44, R46 +12 |
| 13 | 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R21, R29, R35, R36, R37, R38, R43, R47 +5 |
| 2 | 15k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R45, R55 |
| 2 | 47k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R51, R57 |
| 2 | 22k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R73, R75 |
Io board design files
The KiCad project lives in the thehiddendatacentre/DSW repository on GitHub; these links point at the commit this page was built from.
- Layoutio_board/io_board.kicad_pcb
- Schematicio_board/io_board.kicad_sch
Io board: common questions
How big is the Io board?
The Io board measures 80 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Io board?
95 components, from 34 distinct parts. The full bill of materials is listed on this page.
Where can I download the Io board design files?
From the thehiddendatacentre/DSW repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Io board 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.
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