MUX4x1
About the MUX4x1 PCB
MUX4x1 is an open source PCB design by TheJustMoose, published on GitHub. It is a 2-layer board measuring 87.6 × 65.4 mm, with 30 components from 10 distinct parts.
Other key parts include the 74LS153 and 74HC245. By type, the board carries 14 connectors, 6 resistors, 5 ICs, 3 capacitors and 2 diodes.
From the project
Handmade CPU. See README.md
Not a very scary instruction set discrete logic processor.
8 bit data 16 bit address / 64KB RAM 17 bit address (in V register) / 128KW Dual Bank Video RAM 16 instructions 8 data registers and 4 pointer registers in 2 banks 1 flags register in IO port 32 input ports and 32 output ports (You can write a constant to the first 8 ports. Only registers can be written to the remaining ports.) Assembled from 74HCxx series ICs!
Main components on the MUX4x1
MUX4x1 bill of materials (BOM)
30 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 74LS153 | DIP-16_W7.62mm_Socket | U1, U2, U3, U4 |
| 1 | 74HC245 | DIP-20_W7.62mm_Socket | U5 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_Horizontal | J1 |
| 10 | Conn_01x09_Male | PinHeader_1x09_P2.54mm_Vertical | J2, J3, J4, J5, J6, J8, J9, J10 +2 |
| 2 | Conn_01x04_Male | PinHeader_1x04_P2.54mm_Vertical | J7, J14 |
| 1 | Conn_01x01_Male | PinHeader_1x01_P2.54mm_Vertical | J13 |
| 2 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2 |
| 3 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3 |
| 4 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R4, R5, R6 |
| 2 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3 |
MUX4x1 design files
The KiCad project lives in the TheJustMoose/74HCPU repository on GitHub; these links point at the commit this page was built from.
MUX4x1: common questions
How big is the MUX4x1 PCB?
The MUX4x1 measures 87.6 × 65.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MUX4x1?
30 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the MUX4x1 design files?
From the TheJustMoose/74HCPU repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MUX4x1 design in my own project?
The repository has no license, so all rights stay with TheJustMoose. Use it as a reference, and ask the author before reusing the design.
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