HardLabs

Talisman

arijitdasgupta·talisman·pcb/trinket/trinket.kicad_pcb

Talisman PCB layout, top view — open source RP2040/RP2350 board by arijitdasgupta

About the Talisman PCB

Talisman is an open source RP2040/RP2350 PCB design by arijitdasgupta, published on GitHub. It is a 2-layer board measuring 65 × 90 mm, with 17 components from 17 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the MCP73831T-2ACI/OT. By type, the board carries 5 connectors, 4 switches, 2 ICs, 2 capacitors, 2 resistors and 1 transistor.

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

From the project

A simple Raspi Pico based dev board of sorts, with a SSD1306 screen & 3 buttons

In at attempt to teach myself how to design PCBs, I made this trinket thingie to share with my friends. The board runs RP2040, and I am going to make some games for it.

- I2C SSD1306 based display - Raspberry Pi Pico brain - 3 x buttons - Shared power between battery & USB - Battery charging - 3D printable case

The manufacturing process with PCB makers such as JLCPCB is a little convoluted, even though I added BOM, drills and rotation files those may not be usable for you. But the general schematic designs and part ids should be helpful if you decide to make one yourself. If you have any…

Talisman, from the project README
From the project README

Main components on the Talisman

PicoMCP73831T-2ACI/OT

Talisman bill of materials (BOM)

17 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
1
MCP73831T-2ACI/OT
MCP73831T-2ACI_OT
U2
1
C177033
DMP1045U
Q1
1
OLED2
J1
1
OLED1
J2
1
BATT
J7
1
DEBUG_UART
J8
1
BATT_ALT
J9
1
C92658
SW_SPDT
SW1
1
C318915
Left
SW2
1
C318915
Center
SW3
1
C318915
Right
SW4
1
C2286
LED
D1
1
C1712
1u
C2
1
C1746
4u7
C3
1
C149881
10K
R1
1
C21266
470
R2

Talisman design files

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

Talisman: common questions

What microcontroller does the Talisman use?

The Talisman is built around the Pico, from the RP2040/RP2350 family.

How big is the Talisman PCB?

The Talisman measures 65 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Talisman?

17 components, from 17 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 Talisman design files?

From the arijitdasgupta/talisman 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 Talisman design in my own project?

The repository has no license, so all rights stay with arijitdasgupta. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Talisman 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.

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