HardLabs

Serpente

arturo182·serpente_hw

Serpente PCB layout, top view — open source Microchip SAM board by arturo182

About the Serpente PCB

Serpente is an open source Microchip SAM PCB design by arturo182, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 24.8 × 22 mm, with 20 components from 16 distinct parts.

Its main chip is the ATSAMD21E18A, from the Microchip SAM family. Other key parts include the GD25Q32CNIGR and MCP1700-3302E_SOT23. By type, the board carries 6 resistors, 4 capacitors, 3 ICs, 3 connectors, 3 diodes and 1 switch.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A tiny and cheap CircuitPython development board, perfect for quick projects and prototyping!

A tiny and cheap CircuitPython development board, perfect for quick projects and prototyping!

Comes in three versions: Female USB Type-C, Male USB Type-C, and bare PCB USB A plug.

- ATSAMD21E18A 32-bit Cortex-M0+ running at 48MHz - 256KB flash and 32KB RAM - 4MB Flash for storing files and CircuitPython code - 6 highly customizable GPIOs - 250mA LDO - 3.3V logic and power - Powered either from USB or external source - User-controlled RGB LED - Breadboardable headers - Castellated edges, can be used as a module - Mounting holes on the Female Type-C board

Serpente, from the project README
From the project README

Main components on the Serpente

GD25Q32CNIGRMCP1700-3302E_SOT23ATSAMD21E18A

Serpente bill of materials (BOM)

20 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
GD25Q32CNIGR
U1
1
MCP1700-3302E_SOT23
U2
1
ATSAMD21E18A
U3
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J1
1
Conn_Power
J2
1
Conn_GPIO
J3
1
C128937
SW_RESET
SW1
2
C114023
D_Schottky_Small
D1, D2
1
C108793
LED_RBAG
D3
2
1UF
1uF
C1, C4
1
0.1UF
0.1uF
C2
1
10UF
10uF
C3
1
360R
R1
2
150R
R2, R3
2
5.1K
R4, R5
1
1K
R6

Serpente design files

The KiCad project lives in the arturo182/serpente_hw repository on GitHub; these links point at the commit this page was built from.

Serpente: common questions

What microcontroller does the Serpente use?

The Serpente is built around the ATSAMD21E18A, from the Microchip SAM family.

How big is the Serpente PCB?

The Serpente measures 24.8 × 22 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Serpente?

20 components, from 16 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 Serpente design files?

From the arturo182/serpente_hw repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Serpente design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which arturo182 chose for the repository.

Can I test firmware for the Serpente without the hardware?

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

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