Motherboard
About the Motherboard PCB
Motherboard is an open source PCB design by ostertag, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 137.2 × 261 mm, with 68 components from 33 distinct parts.
Other key parts include the REG_INPUTS, REG_OUTPUTS, REG_MISC, REG1_IN and REG2_IN. By type, the board carries 34 ICs, 18 resistors, 8 connectors and 8 diodes.
From the project
Educational 8 bit CPU
Main components on the Motherboard
Motherboard bill of materials (BOM)
68 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | REG_INPUTS | SO-16_3.9x9.9mm_P1.27mm | U1, U2 |
| 2 | REG_OUTPUTS | SO-16_3.9x9.9mm_P1.27mm | U3, U4 |
| 2 | REG_MISC | SO-16_3.9x9.9mm_P1.27mm | U5, U6 |
| 1 | REG1_IN | SO-16_3.9x9.9mm_P1.27mm | U7 |
| 1 | REG2_IN | SO-16_3.9x9.9mm_P1.27mm | U8 |
| 1 | REG3_IN | SO-16_3.9x9.9mm_P1.27mm | U9 |
| 1 | DREG1_H_IN | SO-16_3.9x9.9mm_P1.27mm | U10 |
| 1 | DREG1_L_IN | SO-16_3.9x9.9mm_P1.27mm | U11 |
| 1 | DREG2_H_IN | SO-16_3.9x9.9mm_P1.27mm | U12 |
| 1 | DREG2_L_IN | SO-16_3.9x9.9mm_P1.27mm | U13 |
| 8 | 74HC21 | SO-14_3.9x8.65mm_P1.27mm | U14, U15, U16, U17, U27, U28, U29, U30 |
| 4 | 74HC08 | SO-14_3.9x8.65mm_P1.27mm | U18, U19, U31, U32 |
| 1 | REG1_OUT | SO-16_3.9x9.9mm_P1.27mm | U20 |
| 1 | REG2_OUT | SO-16_3.9x9.9mm_P1.27mm | U21 |
| 1 | REG3_OUT | SO-16_3.9x9.9mm_P1.27mm | U22 |
| 1 | DREG1_L_OUT | SO-16_3.9x9.9mm_P1.27mm | U23 |
| 1 | DREG1_H_OUT | SO-16_3.9x9.9mm_P1.27mm | U24 |
| 1 | DREG2_L_OUT | SO-16_3.9x9.9mm_P1.27mm | U25 |
| 1 | DREG2_H_OUT | SO-16_3.9x9.9mm_P1.27mm | U26 |
| 1 | 74HC04 | SO-14_3.9x8.65mm_P1.27mm | U33 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | REG3_MANUAL_SW | SO-16_3.9x9.9mm_P1.27mm | U34 |
| 1 | Conn_AB | PinSocket_2x08_P2.54mm_Horizontal | J1 |
| 1 | Conn_CD | PinSocket_2x08_P2.54mm_Horizontal | J2 |
| 1 | Conn_EF | PinSocket_2x08_P2.54mm_Horizontal | J3 |
| 1 | Conn_SP | PinSocket_2x09_P2.54mm_Horizontal | J4 |
| 1 | Conn_BP | PinSocket_2x08_P2.54mm_Horizontal | J5 |
| 1 | USB_C_Receptacle_PowerOnly_6P | USB_C_Receptacle_GCT_USB4125-xx-x-0190_6P_TopMnt_Horizontal | J6 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_4Ucon_1x02_P3.50mm_Horizontal | J7 |
| 1 | Conn_SW | PinSocket_2x13_P2.54mm_Horizontal | J8 |
| 8 | LED | LED_0805_2012Metric | D1, D2, D3, D4, D5, D6, D7, D8 |
| 8 | 1k | R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
| 8 | 10k | R_0805_2012Metric | R9, R10, R11, R12, R13, R14, R15, R16 |
| 2 | 5.1k | R_0805_2012Metric | R17, R18 |
Motherboard design files
The KiCad project lives in the ostertag/edu8 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 137.2 × 261 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Motherboard?
68 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the Motherboard design files?
From the ostertag/edu8 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 GPL-2.0 license, which ostertag chose for the repository.
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