ExpansionBoard
About the ExpansionBoard PCB
ExpansionBoard is an open source PCB design by MicroLind-Developers, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 170.2 × 170.2 mm, with 43 components from 25 distinct parts.
Other key parts include the 8259A, AS6C4008-55PCN, Motherboard Outline, 74LS245 and 74LS540. By type, the board carries 19 capacitors, 12 connectors, 8 ICs, 2 resistors, 1 transistor and 1 switch.
From the project
Hardware repository for the microlind project
Main components on the ExpansionBoard
ExpansionBoard bill of materials (BOM)
43 components, 25 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 8259A | DIP-28_W15.24mm_Socket | U1 |
| 2 | AS6C4008-55PCN | DIP-32_W15.24mm_Socket | U2, U3 |
| 1 | Motherboard Outline | mITX | U4 |
| 1 | 74LS245 | DIP-20_W7.62mm_Socket | U6 |
| 1 | 74LS540 | DIP-20_W7.62mm_Socket | U7 |
| 1 | 74AHCT138 | DIP-16_W7.62mm_Socket | U8 |
| 1 | GAL 22V10 | DIP-24_W7.62mm_Socket | U27 |
| 1 | BC337 | TO-92 | Q1 |
| 1 | ExpansionPort_IN | PinSocket_2x25_P2.54mm_Vertical | J1 |
| 1 | Exp 1A | PinSocket_2x13_P2.54mm_Vertical | J2 |
| 1 | Exp 1B | PinSocket_2x11_P2.54mm_Vertical | J3 |
| 1 | Exp 2A | PinSocket_2x13_P2.54mm_Vertical | J4 |
| 1 | Exp 2B | PinSocket_2x11_P2.54mm_Vertical | J5 |
| 1 | Exp 3 | PinSocket_2x13_P2.54mm_Vertical | J6 |
| 1 | Exp 4 | PinSocket_2x13_P2.54mm_Vertical | J7 |
| 1 | Exp 5 | PinSocket_2x13_P2.54mm_Vertical | J8 |
| 1 | Exp 6 | PinSocket_2x13_P2.54mm_Vertical | J9 |
| 1 | ExpansionPort_OUT | PinSocket_2x25_P2.54mm_Vertical | J10 |
| 1 | I2C Header | PinSocket_2x17_P2.54mm_Vertical | J11 |
| 1 | Ext. I2C | PinSocket_1x04_P2.54mm_Vertical | J12 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SW_DIP_x04 | PinHeader_2x04_P2.54mm_Vertical | SW1 |
| 7 | 100n | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7 |
| 12 | 10u | CP_Radial_D5.0mm_P2.00mm | C8, C9, C10, C11, C12, C13, C14, C15 +4 |
| 1 | 4k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 10k | R_Array_SIP7 | RN1 |
ExpansionBoard design files
The KiCad project lives in the MicroLind-Developers/microlind-hw repository on GitHub; these links point at the commit this page was built from.
ExpansionBoard: common questions
How big is the ExpansionBoard PCB?
The ExpansionBoard measures 170.2 × 170.2 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the ExpansionBoard?
43 components, from 25 distinct parts. The full bill of materials is listed on this page.
Where can I download the ExpansionBoard design files?
From the MicroLind-Developers/microlind-hw repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the ExpansionBoard design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which MicroLind-Developers chose for the repository.
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