Sea picro

joshajohnson·sea-picro·hardware/0.2-ext/sea-picro.kicad_pcb

About the Sea picro PCB

Sea picro is an open source RP2040/RP2350 PCB design by joshajohnson, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 17.8 × 33 mm, with 47 components from 19 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AP7365-33WG-7, GD25Q64CWIGR and 74LVC1T45Z6-7. By type, the board carries 19 capacitors, 17 resistors, 4 ICs, 2 transistors, 2 diodes and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

Sea-Picro is a RP2040 based board in the Arduino Pro Micro form factor.

Sea-Picro is a RP2040 based board in the Arduino Pro Micro form factor. Like Sea-Micro, it's designed to be a drop in replacement for keyboards wanting an upgrade from ATmega32u4 based pro micros.

There are two variants: - EXT, featuring an Elite-C pinout, with dedicated 5V RGB LED pin, but without a reset button. - RST, featuring a pro micro pinout, with onboard RGB LED and reset button.

Sea picro, from the project README — From the project README

Main components on the Sea picro

AP7365-33WG-7GD25Q64CWIGRRP2040 74LVC1T45Z6-7

Sea picro bill of materials (BOM)

47 components, 19 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	AP7365-33WG-7 Diodes Incorporated	SOT-23-5	U1
1	GD25Q64CWIGR GigaDevice Semicon Beijing	WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4mm	U2
1	RP2040 Raspberry Pi	RP2040-QFN-56	U3
1	74LVC1T45Z6-7 Diodes Incorporated	SOT-563	U4
2	2N7002V 2N7002VC-7 Changjiang Electronics Tech (CJ)	SOT-563	Q1, Q2
1	2TJ412000HYGBC 12MHz JYJE	Crystal_SMD_2520-4Pin_2.5x2.0mm	Y1
1	918-418K2024S40000 USB_C_Receptacle_USB2.0 Jing Extension of the Electronic Co	USB-C_MID_MOUNT_918-418K2024S40000	J1
1	MF-FSMF050X-2 500mA BOURNS	Fuse_0603_1608Metric	F1
1	B5817WS Shikues	D_SOD-323	D1
1	19-217/BHC-ZL1M2RY/3T LED Everlight Elec	LED_0603_1608Metric	D2
5	CL05A475MP5NRNC 4u7 Samsung Electro-Mechanics	C_0402_1005Metric	C1, C2, C3, C5, C19
10	CL05B104KO5NNNC 100n Samsung Electro-Mechanics	C_0402_1005Metric	C4, C8, C10, C11, C13, C14, C15, C16 +2
2	0402CG150J500NT 15p FH(Guangdong Fenghua Advanced Tech)	C_0402_1005Metric	C6, C7
2	CL10A105KB8NNNC 1u Samsung Electro-Mechanics	C_0402_1005Metric	C9, C12
8	0402WGF5101TCE 5K1 UNI-ROYAL(Uniroyal Elec)	R_0402_1005Metric	R1, R2, R4, R5, R6, R10, R12, R17
2	0402WGF2201TCE 2K2 UNI-ROYAL(Uniroyal Elec)	R_0402_1005Metric	R3, R16
2	0402WGF270JTCE 27R UNI-ROYAL(Uniroyal Elec)	R_0402_1005Metric	R7, R8
2	0402WGF1001TCE 1K UNI-ROYAL(Uniroyal Elec)	R_0402_1005Metric	R9, R15
3	0402WGF5102TCE 51K UNI-ROYAL(Uniroyal Elec)	R_0402_1005Metric	R11, R13, R14

Sea picro design files

The KiCad project lives in the joshajohnson/sea-picro repository on GitHub; these links point at the commit this page was built from.

Sea picro: common questions

What microcontroller does the Sea picro use?

The Sea picro is built around the RP2040, from the RP2040/RP2350 family.

How big is the Sea picro PCB?

The Sea picro measures 17.8 × 33 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Sea picro?

47 components, from 19 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 Sea picro design files?

From the joshajohnson/sea-picro 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 Sea picro design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which joshajohnson chose for the repository.

Can I test firmware for the Sea picro without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.