Mc14500
About the Mc14500 PCB
Mc14500 is an open source PCB design by 89Mods, published on GitHub under the MIT license. It is a 2-layer board, with 65 components from 25 distinct parts.
Other key parts include the 74HC04, 74HC74, 74HC00, 74LS08 and 74HC164. By type, the board carries 26 ICs, 21 resistors, 12 diodes, 2 connectors and 1 capacitor.
From the project
Misc microcomputer projects
Contains hardware schematics and PCB design files (if applicable) for each computer, as well as example software.
I hope this repo will help people with building their own computers. You can either re-build one of the systems from here, or reference my code and schematics when designing your own.
Main components on the Mc14500
Mc14500 bill of materials (BOM)
65 components, 25 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 74HC04 | DIP-14_W10.16mm | U1, U3 |
| 1 | 74HC74 | DIP-14_W10.16mm | U2 |
| 2 | 74HC00 | DIP-14_W10.16mm | U4, U25 |
| 2 | 74LS08 | DIP-14_W10.16mm | U5, U26 |
| 4 | 74HC164 | DIP-14_W10.16mm | U6, U7, U17, U18 |
| 1 | 74LS32 | DIP-14_W10.16mm | U8 |
| 4 | 74LS163 | DIP-16_W7.62mm | U9, U10, U11, U12 |
| 1 | 28C256 | DIP-28_W15.24mm_LongPads | U13 |
| 1 | 74LS259 | DIP-16_W7.62mm | U14 |
| 1 | 74LS138 | DIP-16_W7.62mm | U15 |
| 1 | MC14500 | DIP-16_W7.62mm | U16 |
| 1 | 74HC244 | DIP-20_W7.62mm | U19 |
| 1 | 74HC4051 | DIP-16_W7.62mm | U20 |
| 1 | HY6116A | DIP-24_W15.24mm | U21 |
| 2 | 74HC165 | DIP-16_W7.62mm | U22, U24 |
| 1 | 74LS175 | DIP-16_W7.62mm | U27 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_bornier-2_P5.08mm | J1 |
| 1 | Clock Gen 4MHz | PinSocket_1x03_P2.54mm_Vertical | J2 |
| 3 | HDSP-4830_2 | HDSP-4830 | BAR1, BAR2, BAR3 |
| 8 | LED | LED_D3.0mm | D1, D2, D4, D5, D6, D7, D9, D11 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | D | D_A-405_P10.16mm_Horizontal | D3, D8, D10, D12 |
| 1 | 10µF | CP_Radial_D4.0mm_P2.00mm | C1 |
| 16 | 10K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R7, R10, R11, R12, R13 +8 |
| 1 | 100R | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4 |
| 4 | 1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R5, R6, R8, R9 |
Mc14500 design files
The KiCad project lives in the 89Mods/misc-computers repository on GitHub; these links point at the commit this page was built from.
Mc14500: common questions
How big is the Mc14500 PCB?
The Mc14500 has 2 copper layers and is 1.6 mm thick.
How many components are on the Mc14500?
65 components, from 25 distinct parts. The full bill of materials is listed on this page.
Where can I download the Mc14500 design files?
From the 89Mods/misc-computers repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Mc14500 design in my own project?
Yes, under the terms of its MIT license, which 89Mods chose for the repository.
