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Snitch-2

cscott·rain-barrel·Transflective/Snitch-2/Snitch-2.kicad_pcb

Snitch-2 PCB layout, top view — open source RP2040/RP2350 board by cscott

About the Snitch-2 PCB

Snitch-2 is an open source RP2040/RP2350 PCB design by cscott, published on GitHub. It is a 2-layer board measuring 80.5 × 29.2 mm, with 31 components from 16 distinct parts.

Its main chip is the To Pico, from the RP2040/RP2350 family. Other key parts include the AMC23C10. By type, the board carries 13 capacitors, 8 resistors, 5 diodes, 2 ICs, 2 connectors and 1 inductor.

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

From the project

To do: 1) add STEMMA QT socket(s) 2) add power regulator (5V to 3.3V) 3) add I2C resistors? -- on base plate: (pads to regulate input to 12v (adj) / 5v / 3.3V) nah 2 STEMMA QT / 4 pin header(s) (2) 3 pin (+5V / SIG / GND) header to supply (5V-diode drop) outside, and to supply 5V

To do: 1) add STEMMA QT socket(s) 2) add power regulator (5V to 3.3V) 3) add I2C resistors? -- on base plate: (pads to regulate input to 12v (adj) / 5v / 3.3V) nah 2 STEMMA QT / 4 pin header(s) (2) 3 pin (+5V / SIG / GND) header to supply (5V-diode drop) outside, and to supply 5V power connect to 5V backfeed on unused HUZZAH pin used in basement motor shield Feather! IDC connector to display WATERGPIO (another 5v/sig/gnd header?) breadboard mounting motor shield rasp pi nano footprint -> (5V/SIG/GND) connector for snitch & routed i2c connection ---- To do: assign pin for DSCS Figure out how…

Main components on the Snitch-2

AMC23C10

Snitch-2 bill of materials (BOM)

31 components, 16 distinct parts.

QtyPartRefs
2
AMC23C10
U1, U2
1
SNITCH IN
J1
1
To Pico
J2
5
1SS355VM
D1, D2, D3, D4, D5
1
3.3mH
L1
2
220uF
C1, C2
4
1uF
C3, C6, C10, C13
4
100nF
C4, C5, C11, C12
2
1nF
C7, C9
1
20nF
C8
1
150
R1
3
10
R2, R5, R7
1
160k
R3
1
22k
R4
1
4.7k
R6
1
1k
R8

Snitch-2 design files

The KiCad project lives in the cscott/rain-barrel repository on GitHub; these links point at the commit this page was built from.

Snitch-2: common questions

What microcontroller does the Snitch-2 use?

The Snitch-2 is built around the To Pico, from the RP2040/RP2350 family.

How big is the Snitch-2 PCB?

The Snitch-2 measures 80.5 × 29.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Snitch-2?

31 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Snitch-2 design files?

From the cscott/rain-barrel repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Snitch-2 design in my own project?

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

Can I test firmware for the Snitch-2 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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