Minimal Pi Pico 2 Design

amirkat

amirkat

Add the minimum required components needed for this Pi Pico 2 to function properly. Keep the design as simple and minimal as possible.
You may include a single humidity sensor as the primary peripheral, along with any essential supporting components such as power regulation, pull-up resistors, decoupling capacitors, or required connectors.

flux

0:14

Thought for 5 sec

Thought for 4 sec

Thought for a moment

I’ll keep this minimal: inspect the Pico shield pins, choose a simple I2C humidity sensor, add only its required pull-ups/decoupling, then wire and run checks.

flux

3:27

Thought for 2 sec

Created 5 tasks.

1/5 Inspect existing Pico 2 shield symbol pins and current nets

Thought for 1 sec

Read schematic.

Thought for 4 sec

2/5 Select a minimal humidity sensor and required support passives

Thought for 3 sec

Found 3 results for Find a simple 3.3 V I2C humidity and temperature sensor suitable for a minimal Raspberry Pi Pico 2 shield. Prefer common parts like Sensirion SHTC3/SHT30/SHT40 or TI HDC1080/HDC2010 with Flux part UID, small SMD footprint, datasheet, and low current. It needs pins VDD, GND, SDA, SCL and minimal support passives..

Thought for 9 sec

Read SHT40-AD1F-R2 datasheet for pin description VDD SDA SCL ADDR nRESET .

Found 5 results for Generic Resistor.

Found 5 results for Generic Capacitor.

Read "[Datasheet for SHT40-AD1F-R2, Sensirion AG] pin description VDD SDA SCL ADDR nRESET supply voltage decoupling capacitor I2C pull-up resistors typical application circuit" in Datasheet_SHT4x_1.pdf.

Read Datasheet_SHT4x_1.pdf.

Thought for 11 sec

3/5 Add sensor, I2C pull-ups, and decoupling capacitor

Thought for 9 sec

Thought for 4 sec

4/5 Wire Pico 2 power, ground, and I2C sensor connections

Thought for 2 sec

Thought for 6 sec

Thought for 4 sec

Thought for 5 sec

5/5 Validate schematic with connectivity and review checks

Thought for 3 sec

Completed design checks — found 54 issues.

Read schematic.

Thought for 10 sec

Thought for 11 sec

Thought for a moment

Schematic wiring is complete; I’m cleaning up ERC noise from the unused Pico shield pins and documenting the minimal design decisions.

flux

5:14

Thought for 14 sec

Thought for 10 sec

Thought for 15 sec

Thought for 21 sec

Thought for 5 sec

Completed 8 design checks — found 15 issues.

Thought for 10 sec

Thought for 4 sec

Found 2 results for Generic 2 pin header connector 2.54mm through hole.

Thought for 4 sec

Found 20 results for 2 pin connector header 2.54mm.

No results for PinHeader_1x02_P2.54mm.

Thought for 7 sec

Thought for 2 sec

Thought for 3 sec

Thought for 4 sec

Completed 5 design checks — found 16 issues.

Thought for 17 sec

Thought for 6 sec

5/5 tasks completed.

Thought for a moment

Done — I added the minimal Pico 2 humidity shield circuitry: SHT40 sensor, 10kΩ SDA/SCL pull-ups, 100nF sensor decoupling, and a simple 2-pin 5V/GND VBUS power header.
The schematic ERC is clean for the added circuit; remaining review errors are PCB airwires only, which are expected because the new components have not been placed/routed yet. I also recorded the design rationale in Minimal Pico 2 Humidity Shield Notes.
Move to layout
Keep schematic only
Remove power header
Add firmware notes
Review component values

Finished working

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Minimal Pico 2 Humidity Shield Notes
Goal
Keep the Raspberry Pi Pico 2 shield design as simple as possible while adding one primary peripheral: an I2C humidity/temperature sensor.
Selected Sensor
  • U2: Sensirion SHT40-AD1F-R2
  • Interface: I2C
  • I2C address: 0x44
  • Supply: 1.08 V to 3.6 V; used at Pico 2 3V3
  • Datasheet typical application: SDA/SCL each have a 10 kΩ pull-up to VDD, and VDD has a 100 nF decoupling capacitor to VSS/GND.

Connections

NetPico 2 Shield PinSensor / Support Connections
VBUS_5V_INU1 VBUS pin 40J1 P1 external 5 V input
3V3U1 pin 36U2 VDD, R1 P2, R2 P2, C1 P1
GNDAll U1 GND pins and AGNDU2 VSS, C1 P2, J1 P2
I2C0_SDAU1 GPIO4 pin 6U2 SDA, R1 P1
I2C0_SCLU1 GPIO5 pin 7U2 SCL, R2 P1
Supporting Components
  • J1: 2-pin 2.54 mm power header for optional external 5 V/GND input to Pico 2 VBUS
  • R1: 10 kΩ I2C SDA pull-up to 3V3
  • R2: 10 kΩ I2C SCL pull-up to 3V3
  • C1: 100 nF local decoupling capacitor from SHT40 VDD to GND
Power Budget
No additional regulator is required because this shield uses the Pico 2 module's onboard 3.3 V rail. The SHT40 load is very small compared with the Pico 2 3V3 rail capability. J1 provides a minimal explicit 5 V/GND input option for the Pico 2 VBUS pin; alternatively, if the physical Pico 2 module is powered via its onboard USB connector, J1 can be left unpopulated.
Minimality Decisions
  • No separate regulator was added.
  • One 2-pin power header was added only to give the Pico 2 VBUS input an explicit external power entry in this shield schematic.
  • Unused Pico 2 shield pins were marked as intentionally unused for this minimal variant.
  • PCB routing/placement DRC airwires are expected until the user approves moving from schematic to PCB layout.

    Goal

    Selected Sensor

    Connections

    Supporting Components

    Power Budget

    Minimality Decisions

Documents

    Minimal Pico 2 Humidity Shield Notes

Assets

pico-template.png

pico-template.png

pico-templateThumbnail

Raspberry Pi Pico 2 Shield Template rTNG

Raspberry Pi Pico 2 Shield Template rTNG thumbnail
This is the project template for the Raspberry Pi Pico 2, the latest addition and update to Pi Pico line up.
Raspberry pi pico 2 is equipped with the RP2350, a cutting-edge, high-performance microcontroller designed with enhanced security and versatility in mind. Every element of its design has been upgraded, from the advanced CPU cores to the innovative PIO (Programmable I/O) interfacing subsystem.
The Raspberry Pi Foundation has integrated a robust security architecture centered around Arm TrustZone for Cortex-M, ensuring data protection and integrity. Additionally, new low-power states and expanded package options broaden the range of applications, making the Pico 2 an ideal choice for diverse, power-sensitive projects.
To learn more about what's the key differences between the original Pi Pico and the new Pi Pico 2, read our blog https://www.flux.ai/p/blog/whats-new-in-the-raspberry-pi-pico-2-a-showdown-with-the-original-raspberry-pi-pico
#project-template #template #raspberry #pi #pico2 #newpico

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$1.46

Digi-Key

$1.25

LCSC

$2.14

Mouser

$2.34

TME

$6.10

Verical

$1.61–$1.87

Controls