Mainboard
About the Mainboard PCB
Mainboard 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 64 components from 26 distinct parts.
Other key parts include the 40106, TL074, 4070, 4520 and 4015. By type, the board carries 34 resistors, 11 capacitors, 6 ICs, 4 transistors, 4 diodes and 3 connectors.
It belongs with the audio designs in this gallery.
From the project
Digital Sine Wave Generator Eurorack Module
Main components on the Mainboard
Mainboard bill of materials (BOM)
64 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 40106 | DIP-14_W7.62mm_Socket_LongPads | U1 |
| 1 | TL074 | DIP-14_W7.62mm_Socket_LongPads | U2 |
| 1 | 4070 | DIP-14_W7.62mm_Socket_LongPads | U4 |
| 1 | 4520 | DIP-16_W7.62mm_Socket_LongPads | U5 |
| 2 | 4015 | DIP-16_W7.62mm_Socket_LongPads | U6, U7 |
| 2 | 2N3906 | TO-92_Inline | Q1, Q2 |
| 2 | 2N3904 | TO-92_Inline | Q3, Q4 |
| 1 | 302-S101 Eurorack_Power | Eurorack_Power_2x5_Shrouded | J1 |
| 1 | Osc1_Socket | PinSocket_1x12_P2.54mm_Vertical | J2 |
| 1 | Osc2_Socket | PinSocket_1x12_P2.54mm_Vertical | J3 |
| 2 | 1k | Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 2 | 1N4001 | D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2 |
| 2 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4 |
| 2 | 10nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C4 |
| 2 | 10uF | C_Radial_D5.0mm_H11.0mm_P2.00mm | C2, C3 |
| 7 | 100nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C7, C8, C9, C10, C11, C12, C13 |
| 2 | 1M | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2 |
| 1 | 1Meg | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3 |
| 5 | 330k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6, R10, R16, R18, R24 |
| 10 | 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R7, R8, R13, R21, R25, R26, R27, R30 +2 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 470k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9, R17 |
| 4 | 220k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R11, R15, R19, R23 |
| 4 | 150k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R12, R14, R20, R22 |
| 2 | 47k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R28, R31 |
| 2 | 22k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R29, R32 |
| 2 | 1.5k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R35, R36 |
Mainboard design files
The KiCad project lives in the thehiddendatacentre/DSW repository on GitHub; these links point at the commit this page was built from.
- Layoutmainboard/mainboard.kicad_pcb
- Schematicmainboard/mainboard.kicad_sch
Mainboard: common questions
How big is the Mainboard PCB?
The Mainboard measures 80 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Mainboard?
64 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the Mainboard 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 Mainboard 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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