profdc9/PicoAlt211An alternative Pi Pico 2 (RP2350) type board you can have made yourself.
PicoAlt is an open-source printed circuit board by profdc9, from the profdc9/PicoAlt2 repository on GitHub. It is a 2-layer board of 21 × 58 mm with 42 parts on 57 nets, routed with 706 tracks and 62 vias.
It is built around the RP2350A, W25Q128JVSIQ and AMS1117-3.3, with the SS14 among its other parts. Its parts include 20 capacitors, 8 resistors, 4 connectors, 3 ICs and 2 diodes. It belongs with the RP2350 boards of this library.
This is a simplified Pi Pico board for the new RP2350. This has been fabricated by JLCPCB and a photograph of the result is below. It is tested to download sketches. I customized it to add more flash (16 MB), a linear regulator (AMS1117-3.3), and to be easier to modify if needed.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100 nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C7, C8, C9, C11, C13, C19 |
| 9 | 4.7 uF | Capacitor_SMD:C_0603_1608Metric | C4, C5, C6, C10, C12, C14, C15, C18, C20 |
| 2 | 15 pF | Capacitor_SMD:C_0402_1005Metric | C16, C17 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R5, R9 |
| 2 | 22R | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J4, J5 |
| 2 | SW_Push | PicoAlt:K2-1808UN | SW1, SW2 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 12 MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 200R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | 3.3 uH | PicoAlt:Abracon_Pico_inductor | L1 |
| 1 | 33R | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | ADC3 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | RP2350 | PicoAlt:QFN-60-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U3 |
| 1 | SS14 | Diode_SMD:D_SMA | D2 |
| 1 | USB_B | Connector_USB:USB_B_OST_USB-B1HSxx_Horizontal | J2 |
| 1 | W25Q128JVSIQ | PicoAlt:SOIC-8_3.9x4.9mm_P1.27mm_mod | U2 |
It measures 21 × 58 mm and has 2 copper layers, 1.6 mm thick.
42 parts, built around the RP2350A, W25Q128JVSIQ, AMS1117-3.3 and SS14. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the profdc9/PicoAlt2 repository on GitHub, at the commit this page was made from: the board is PicoAlt.kicad_pcb and its schematic PicoAlt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask profdc9 before reusing the design.
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