MainBoard
About the MainBoard PCB
MainBoard is an open source PCB design by nandgate, published on GitHub under the MIT license. It is a 2-layer board measuring 203.2 × 101.6 mm, with 51 components from 23 distinct parts.
Other key parts include the ATF16V8C, KM62256CLP, LM555xN, G65SC22P-2 and UMFT240XA. By type, the board carries 17 connectors, 14 resistors, 7 capacitors, 6 ICs, 3 transistors and 2 switches.
From the project
Hardware designs for 8-bit homebrew computer
Hardware files for the 8-bit homebrew project.
Each folder contains the KiCad project for a processor/board. Under the PLD there is a folder with the WinCUPL projects for the PLD for each board.
Main components on the MainBoard
MainBoard bill of materials (BOM)
51 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATF16V8C | DIP-20_W7.62mm_Socket_LongPads | U1 |
| 2 | KM62256CLP | DIP-28_W7.62mm_W15.64mm_LongPads | U2, U4 |
| 1 | LM555xN | DIP-8_W7.62mm | U3 |
| 1 | G65SC22P-2 | DIP-40_W15.24mm_Socket_LongPads | U5 |
| 1 | UMFT240XA | DIP-24_W7.62mm_Socket_LongPads | U6 |
| 3 | 2N3904 | TO-92_Inline | Q1, Q2, Q3 |
| 4 | Conn_02x16_Odd_Even | PinSocket_2x16_P2.54mm_Vertical | J1, J4, J8, J10 |
| 2 | Conn_02x21_Odd_Even | PinSocket_2x21_P2.54mm_Vertical | J2, J5 |
| 4 | Conn_01x04 | PinSocket_1x04_P2.54mm_Vertical | J3, J6, J9, J11 |
| 1 | Barrel_Jack_Switch | BarrelJack_Wuerth_6941xx301002 | J7 |
| 3 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J12, J16, J17 |
| 2 | Conn_01x09 | PinHeader_1x09_P2.54mm_Vertical | J13, J14 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J15 |
| 1 | TBA_2-1211 | CONV_TBA_2-1211 | PS1 |
| 1 | SW_Push | SW_PUSH_6mm | SW1 |
| 1 | SW_SPST | SW_DIP_SPSTx01_Slide_9.78x4.72mm_W7.62mm_P2.54mm | SW2 |
| 1 | LED_RGBK | RGB_SMD_W7.8_H7.9 | D1 |
| 3 | 47uF | CP_Radial_D5.0mm_P2.00mm | C1, C2, C5 |
| 4 | 0.1uF | C_Rect_L7.0mm_W2.5mm_P5.00mm | C3, C4, C6, C7 |
| 11 | 10.1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 +3 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2.0K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11 |
| 1 | 2.1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12 |
| 1 | 3.3K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R13 |
MainBoard design files
The KiCad project lives in the nandgate/Homebrew-HW 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 203.2 × 101.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MainBoard?
51 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the MainBoard design files?
From the nandgate/Homebrew-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 MainBoard design in my own project?
Yes, under the terms of its MIT license, which nandgate chose for the repository.
