Cpuexperiment
About the Cpuexperiment PCB
Cpuexperiment is an open source PCB design by fjalvingh, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 160 × 100 mm, with 78 components from 19 distinct parts.
Other key parts include the am2901, 74LS151, 74LS00, 74LS10 and 74LS11. By type, the board carries 27 resistors, 25 diodes, 11 ICs, 11 capacitors and 4 connectors.
From the project
Experimenting with am29xx bitslice chips to make a homemade CPU
The am29xx series of bitslice CPU parts were a big thing when they arrived, and they have been used in many vintage designs. I find them interesting because they are still reasonably simple to understand, and they do replace a large amount of TTL logic for a homebrew CPU. I got a few of these parts from different places and decided to play with them to get an idea on how they work.
Main components on the Cpuexperiment
Cpuexperiment bill of materials (BOM)
78 components, 19 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | am2901 | DIP-40_W15.24mm_Socket_LongPads | U1, U6, U10, U11 |
| 1 | 74LS151 | DIP-16_W7.62mm_Socket_LongPads | U2 |
| 2 | 74LS00 | DIP-14_W7.62mm_Socket_LongPads | U3, U4 |
| 1 | 74LS10 | DIP-14_W7.62mm_Socket_LongPads | U5 |
| 1 | 74LS11 | DIP-14_W7.62mm_Socket_LongPads | U7 |
| 1 | 74S182 | DIP-16_W7.62mm_Socket_LongPads | U8 |
| 1 | 74LS373 | DIP-20_W7.62mm_Socket_LongPads | U9 |
| 1 | backplane 2 | PinSocket_2x20_P2.54mm_Horizontal | J1 |
| 1 | backplane 1 | PinSocket_2x20_P2.54mm_Horizontal | J2 |
| 1 | disp_adlow | PinSocket_1x10_P2.54mm_Vertical | J3 |
| 1 | disp_adhigh | PinSocket_1x10_P2.54mm_Vertical | J4 |
| 4 | Red | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D3, D4 |
| 7 | Yellow | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5, D6, D7, D8, D12, D13, D14 |
| 4 | Blue | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D9, D10, D11, D25 |
| 7 | Green | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D15, D16, D17, D21, D22, D23, D24 |
| 3 | White | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D18, D19, D20 |
| 11 | 100nF | C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7, C8 +3 |
| 2 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 25 | 1K5 | R_0805_2012Metric | R3, R4, R5, R6, R7, R8, R9, R10 +17 |
Cpuexperiment design files
The KiCad project lives in the fjalvingh/cpuexperiment repository on GitHub; these links point at the commit this page was built from.
Cpuexperiment: common questions
How big is the Cpuexperiment PCB?
The Cpuexperiment measures 160 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cpuexperiment?
78 components, from 19 distinct parts. The full bill of materials is listed on this page.
Where can I download the Cpuexperiment design files?
From the fjalvingh/cpuexperiment repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Cpuexperiment design in my own project?
Yes, under the terms of its GPL-2.0 license, which fjalvingh chose for the repository.