does this device allow 5v or 3.3v on the input and output pins?

Definitely not 5 volt compliant. According to the Raspberry RP2040 chip spec the maximum digital input voltage is IOVDD +0.3 VOLTS. Since the maximum IOVDD is 3.63 volts, the absolute max would be 3.93 volts.

Does it come with pin connectors?

mine came with two sets of header pins which you must solder in place if you wish to use them.

Can you use this with accelerometer to make a spirit level?

Sure. You would also need a display and a battery. Or use a USB cable and display on a computer. But this would be overkill if it weren't so hard to get old cheap chips these days. It's fine for a one off, but if you're thinking of production, check out things like older PIC an AT-Tiny parts. But if it's an actual spirit level you want, just buy one. If this is for inside a vehicle or robot, beware that accelerometers can only detect level in an unaccelerated frame (such as stationary, or constant speed including no turning).

what board choice in Arduino for code uploading? Does not upload as Uno

In Auruino IDE, go to board selection, board manager and search for Seeed RP2040 boards. Download and install. Restart Arduino for it to recognize new libraries.

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Seeed Studio XIAO RP2040 マイクロコントローラー、デュアルコアARM Cortex M0+プロセッサー付き、Arduino、MicroPython、CircuitPython、豊富なインターフェースに対応。

Product ID: 729398108

Details

CPUスピード
133 MHz
インストール済みのRAMメモリサイズ
264 KB
ブランド
seeed studio
メモリストレージ容量
2 MB
モデル名
XIAO RP2040

⚡Dual-core ARM Cortex M0+ @133MHz

💾2MB onboard flash + 264KB SRAM

🔌11 digital + 4 analog + multi-interface pins

13148CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Tiny Titan: Power, speed, and versatility in the palm of your hand!

INTERFACE GALORE - Packed with 11 digital, 4 analog, PWM pins plus I2C, UART, SPI for ultimate connectivity.
PLUG PLAY CODING - Supports Arduino, MicroPython, CircuitPython with hassle-free USB programming—no boot button needed.
MEMORY THAT KEEPS UP - Generous 2MB flash and 264KB SRAM to handle complex projects without breaking a sweat.
POWERHOUSE PERFORMANCE - Dual-core ARM Cortex M0+ processor running at a blazing 133MHz for seamless multitasking.
COMPACT BREADBOARD FRIENDLY - Tiny 20x17.5mm footprint with SMD design, perfect for wearable and space-conscious projects.

The Seeed Studio XIAO RP2040 is a compact microcontroller featuring a dual-core ARM Cortex M0+ processor clocked at 133MHz, equipped with 2MB onboard flash memory and 264KB SRAM. It offers a rich set of interfaces including digital, analog, PWM pins, and communication protocols like I2C, UART, and SPI. Compatible with Arduino, MicroPython, and CircuitPython, this breadboard-friendly board is ideal for wearable tech and small-scale projects, delivering powerful performance in a tiny 20x17.5mm form factor.

Specifications

ASIN	B09NNVNW7M
Amazon 売れ筋ランキング	パソコン・周辺機器 - 11,706位 ( パソコン・周辺機器の売れ筋ランキングを見る ) シングルボードコンピュータ - 31位
OS1	MicroPython or CircuitPython (or similar embedded operating system)
RAMメモリ採用技術	SRAM
USBポート数	1
おすすめ度	4.6 5つ星のうち4.6 (194) var
コンピュータCPU製造会社	ARM
コンピュータCPU速度	133 MHz
ブランド名	seeed studio
プロセッサ数	2
メーカー名	seeed studio
メーカー型番	500230492
ワイヤレス通信規格	802.11b
互換デバイス	Seeeduino XIAOとその拡張ボード。
付属品総数	1
内蔵メモリー容量	264 KB
同梱商品	/
品目寸法（L x W x H）	20長さ x 17幅 x 4高さ mm
型番	500230492
最大メモリ容量(GB)	2 MB
通信・接続インターフェース	Uart

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