Csr
magik6k·breadv·pcbs/csr/csr.kicad_pcb
About the Csr PCB
Csr is an open source PCB design by magik6k, published on GitHub under the Custom license license. It is a 2-layer board measuring 136.7 × 81 mm, with 35 components from 8 distinct parts.
Other key parts include the 74LS377, 74HCT541 and 74HC688. By type, the board carries 22 ICs, 8 connectors, 3 switches and 2 resistors.
From the project
Code bits of the TTL breadbord RISC-V

Main components on the Csr
Csr bill of materials (BOM)
35 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | 74LS377 | DIP-20_W8.89mm_SMDSocket_LongPads | U1, U3, U6, U8, U11, U13, U17, U18 |
| 12 | 74HCT541 | DIP-20_W8.89mm_SMDSocket_LongPads | U2, U4, U5, U7, U9, U10, U12, U14 +4 |
| 2 | 74HC688 | SOIC-20W_7.5x12.8mm_P1.27mm | U21, U22 |
| 4 | Conn_01x10_Female | PinHeader_1x10_P2.54mm_Vertical | J1, J4, J5, J6 |
| 2 | Conn_01x40_Female | PinHeader_1x40_P2.54mm_Vertical | J2, J3 |
| 2 | Conn_01x40_Male | PinHeader_1x40_P2.54mm_Vertical | J7, J8 |
| 3 | SW_Coded_SH-7050 | Nidec_Copal_SH-7010A | SW1, SW2, SW3 |
| 2 | R_Network08 | R_Array_SIP9 | RN1, RN2 |
Csr design files
The KiCad project lives in the magik6k/breadv repository on GitHub; these links point at the commit this page was built from.
- Layoutpcbs/csr/csr.kicad_pcb
- Schematicpcbs/csr/csr.kicad_sch
- BOMpcbs/8view/8view.csv
Csr: common questions
How big is the Csr PCB?
The Csr measures 136.7 × 81 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Csr?
35 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Csr design files?
From the magik6k/breadv repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Csr design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.