Alleycat left
About the Alleycat left PCB
Alleycat left is an open source Nordic nRF PCB design by hextral, published on GitHub. It is a 2-layer board measuring 139.8 × 136.9 mm, with 116 components from 32 distinct parts.
Its main chip is the nRF52840_holyiot_18010, from the Nordic nRF family. Other key parts include the TP4056, DW01A, FS8205, SRV05-4 and XC6206PxxxMR. By type, the board carries 46 diodes, 11 resistors, 8 capacitors, 6 ICs, 3 switches and 2 connectors.
It belongs with the iot & wireless designs in this gallery.
From the project
yooo
- wireless - split - oled support - triple encoder support (4 without joystick) - 3ds joystick nip - optional fn row
- firmware is zmk - uses nRF52840 in the E73-2G4M08S1C package
Main components on the Alleycat left
Alleycat left bill of materials (BOM)
116 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | nRF52840_holyiot_18010 | nRF52840_holyiot_18010 | U1 |
| 1 | TP4056 | SOP-8-1EP_4.57x4.57mm_P1.27mm_EP4.57x4.45mm | U2 |
| 1 | DW01A | SOT-23-6 | U3 |
| 1 | FS8205 | SOT-23-6 | U4 |
| 1 | SRV05-4 | SOT-23-6-routable | U5 |
| 1 | XC6206PxxxMR | SOT-23 | U6 |
| 1 | Conn_01x04_Male | SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | USB_C_Receptacle_USB2.0 | TYPE-C-31-M-12 | J2 |
| 1 | Polyfuse_Small | Fuse_1206_3216Metric | F1 |
| 1 | THERM | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 36 | MX-NoLED | MXOnly-1U-Hotswap | MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +28 |
| 1 | MX-NoLED | MXOnly-2U-Hotswap | MX36 |
| 1 | RKJXT1F42001 | RKJXT1F42001 | S1 |
| 1 | SW_Push | SW_SPST_TL3342 | SW1 |
| 1 | RotaryEncoder_Switch | RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW2 |
| 43 | D_Small | D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8 +35 |
| 2 | LED | LED_0805_2012Metric | D38, D39 |
| 1 | D_TVS | SOD-323 | D43 |
| 1 | L | C_0402_1005Metric | L1 |
| 1 | 10uf | C_0805_2012Metric | C1 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100nf | C_0805_2012Metric | C2, C3, C8 |
| 2 | 4.7uf | C_0805_2012Metric | C4, C5 |
| 2 | 1uf | C_0805_2012Metric | C6, C7 |
| 2 | 2.7k | R_0805_2012Metric | R1, R2 |
| 1 | 1.8k | R_0805_2012Metric | R3 |
| 1 | 3.3k | R_0805_2012Metric | R4 |
| 1 | 22k | R_0805_2012Metric | R5 |
| 2 | 5.1k | R_0805_2012Metric | R6, R7 |
| 1 | 100 | R_0805_2012Metric | R8 |
| 1 | 1k | R_0805_2012Metric | R9 |
| 1 | 806k | R_0805_2012Metric | R10 |
| 1 | 2M | R_0805_2012Metric | R11 |
Alleycat left design files
The KiCad project lives in the hextral/alleycat repository on GitHub; these links point at the commit this page was built from.
Alleycat left: common questions
What microcontroller does the Alleycat left use?
The Alleycat left is built around the nRF52840_holyiot_18010, from the Nordic nRF family.
How big is the Alleycat left PCB?
The Alleycat left measures 139.8 × 136.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Alleycat left?
116 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the Alleycat left design files?
From the hextral/alleycat repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Alleycat left design in my own project?
The repository has no license, so all rights stay with hextral. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Alleycat left without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.
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