Motherboard
About the Motherboard PCB
Motherboard 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 120 components from 63 distinct parts.
Other key parts include the 74HC245, MC6809, 28C64, AS6C4008 and 74LS138. By type, the board carries 41 capacitors, 27 ICs, 24 connectors, 24 resistors, 2 crystals and 1 transistor.
From the project
Hardware repository for the microlind project
Main components on the Motherboard
Motherboard bill of materials (BOM)
120 components, 63 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | mITX | U1 |
| 4 | 74HC245 | DIP-20_W7.62mm_Socket | U2, U4, U6, U28 |
| 1 | MC6809 | DIP-40_W15.24mm_Socket | U3 |
| 1 | 28C64 | DIP-28_W15.24mm_Socket | U5 |
| 2 | AS6C4008 | DIP-32_W15.24mm_Socket | U7, U8 |
| 1 | 74LS138 | DIP-16_W7.62mm_Socket | U10 |
| 1 | MAX708 | DIP-8_W7.62mm_Socket | U11 |
| 1 | 65c22 | DIP-40_W15.24mm_Socket | U12 |
| 1 | XR88C92 | PLCC-44_THT-Socket | U13 |
| 1 | MAX232 | DIP-16_W7.62mm_Socket | U14 |
| 1 | MCP2221A | DIP-14_W7.62mm_Socket | U15 |
| 1 | 74HCT02 | DIP-14_W7.62mm_Socket | U16 |
| 2 | 74HCT148 | DIP-16_W7.62mm_Socket | U17, U18 |
| 2 | 74HCT574 | DIP-20_W7.62mm_Socket | U19, U21 |
| 1 | 74HCT00 | DIP-14_W7.62mm_Socket | U20 |
| 1 | 74HCT85 | DIP-16_W7.62mm_Socket | U22 |
| 2 | GAL 22V10 | DIP-24_W7.62mm_Socket | U23, U26 |
| 2 | 74LS670 | DIP-16_W7.62mm_Socket | U24, U25 |
| 1 | GAL16V8 | DIP-20_W7.62mm_Socket | U27 |
| 1 | BC337 | TO-92_Inline | Q1 |
Show 43 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 12MHz | Crystal_HC49-U_Vertical | Y1 |
| 1 | 3.3864 | Crystal_HC49-U_Vertical | Y2 |
| 1 | HALT | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Write Enable | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Reset EN | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | PowerLed | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Reset | PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | PC Speaker | PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | POT Con | PinHeader_1x05_P2.54mm_Vertical | J7 |
| 1 | Clock Exp. | PinHeader_1x06_P2.54mm_Vertical | J8 |
| 1 | LPen | PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | CTS | PinHeader_1x02_P2.54mm_Vertical | J10 |
| 1 | RTS | PinHeader_1x02_P2.54mm_Vertical | J11 |
| 1 | MEM | PinHeader_1x02_P2.54mm_Vertical | J12 |
| 1 | EX1 | PinHeader_1x02_P2.54mm_Vertical | J13 |
| 1 | EX2 | PinHeader_1x02_P2.54mm_Vertical | J14 |
| 1 | FUT | PinHeader_1x02_P2.54mm_Vertical | J15 |
| 1 | +12v | PinHeader_1x01_P2.54mm_Vertical | J16 |
| 1 | VideoAddon | PinSocket_2x20_P2.54mm_Vertical | P1 |
| 1 | AudioAddon | PinSocket_2x20_P2.54mm_Vertical | P2 |
| 1 | ExpansionPort | PinSocket_2x25_P2.54mm_Vertical | P3 |
| 1 | Compact Flash Addon | PinSocket_2x10_P2.54mm_Vertical | P4 |
| 1 | Console | USB_B_Lumberg_2411_02_Horizontal | P5 |
| 1 | Serial | 23018431 | P6 |
| 1 | Power | BarrelJack_CUI_PJ-063AH_Horizontal | P7 |
| 1 | Joystic Ports | DSUB-9-Double_NorComp | P8 |
| 1 | Power Switch | CMD-Switch | SW1 |
| 2 | 22pF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2 |
| 25 | 100n | C_Disc_D5.0mm_W2.5mm_P2.50mm | C3, C4, C5, C6, C7, C8, C9, C13 +17 |
| 1 | 100µF | CP_Radial_D6.3mm_P2.50mm | C11 |
| 1 | 10µF | CP_Radial_D4.0mm_P2.00mm | C12 |
| 2 | 43pF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C15, C16 |
| 6 | 1u | CP_Radial_D4.0mm_P2.00mm | C19, C20, C21, C22, C23, C36 |
| 4 | 10u | CP_Radial_D4.0mm_P2.00mm | C37, C38, C39, C41 |
| 11 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R17 +3 |
| 1 | 1k5 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R8 |
| 1 | 1k0 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9 |
| 1 | 1k8 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R10 |
| 2 | 4k7 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R11, R12 |
| 1 | 33k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R21 |
| 2 | R_Network08 | R_Array_SIP9 | RN1, RN2 |
| 4 | 10k | R_Array_SIP9 | RN3, RN4, RN5, RN6 |
| 1 | 4x 10k | R_Array_SIP5 | RN7 |
Motherboard 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.
Motherboard: common questions
How big is the Motherboard PCB?
The Motherboard measures 170.2 × 170.2 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Motherboard?
120 components, from 63 distinct parts. The full bill of materials is listed on this page.
Where can I download the Motherboard 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 Motherboard 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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