Arduino 開發板
Arduino Uno R3 (Micro USB)
Arduino Uno R3 Clone Micro Usb
Arduino Uno是一塊微控制器板(microcontroller board)，大約一個手掌大，在Arduino家族當中，是最廣泛運用的控制板，在義大利文中，Uno就是1的意思，代表Arduino的一個新開始。 而BotSheet售賣的Arduino Uno是R3版本，是Arduino Uno的第三代版本，記憶體晶片由R2的MEGA8U2改為MEGA16U2，擁有16KB快閃記憶體、512Bytes主記憶體與EEPROM，比R2版本多出一倍，以及加入了ICSP接腳，用於燒錄韌體。
規格
- 供電電壓
- 5 V
- 邏輯電平
- 5 V
- 介面
- i2c, spi, uart, pwm, analog, gpio
- 尺寸
- 68.7 × 53.3 × 15.5 mm
針腳
| 名稱 | 類型 | 說明 |
|---|---|---|
| IOREF | output | I/O reference voltage, indicates logic voltage level |
| RESET | input | Active-low reset, pulling low restarts MCU |
| 3V3 | power | |
| 5V | power | |
| GND | ground | |
| VIN | power | External supply input, accepts 6-20V DC |
| A0 | analog | Also usable as digital GPIO |
| A1 | analog | Also usable as digital GPIO |
| A2 | analog | Also usable as digital GPIO |
| A3 | analog | Also usable as digital GPIO |
| A4 | analog | Also usable as I2C SDA |
| A5 | analog | Also usable as I2C SCL |
| D0/RX | bidirectional | UART RX |
| D1/TX | bidirectional | UART TX |
| D2 | bidirectional | Supports external interrupt |
| D3 | bidirectional | Supports external interrupt and PWM |
| D4 | bidirectional | |
| D5 | bidirectional | Supports PWM |
| D6 | bidirectional | Supports PWM |
| D7 | bidirectional | |
| D8 | bidirectional | |
| D9 | bidirectional | Supports PWM |
| D10/SS | bidirectional | Supports PWM and SPI slave select |
| D11/MOSI | bidirectional | Supports PWM and SPI MOSI |
| D12/MISO | bidirectional | SPI MISO |
| D13/SCK | bidirectional | Supports SPI SCK and built-in LED |
| AREF | input | Analog reference voltage input |
| SDA | bidirectional | I2C data |
| SCL | bidirectional | I2C clock |
| NC | nc | Not connected |
程式庫
其他規格
- 輸入電壓
- 6-20V (建議在7-12V內)
- 連接
- Micro USB
- 支援三種供電方式
- USB，VIN，外部5V輸入
使用注意
- 市面上嘅 Arduino Uno R3 多數係副廠 clone，USB 轉接晶片可能係 CH340、CP2102 等而唔係原廠 ATmega16U2，需要安裝對應驅動先至認到 COM port。供電方面，VIN 同 DC jack 係並聯，同時插 USB 同外部電源時會自動切換，但唔好同時由 VIN 同 5V 排針同時餵電，會倒灌。3V3 排針由 SPX1117 穩壓器提供，電流有限，唔好攞嚟推大負載。A4/A5 同時係 I2C SDA/SCL，用 I2C 時唔可以再做普通 analog input。D0/D1 係 UART，插住 USB 燒錄程式時唔好接其他嘢，否則會衝突。AREF 若要外部參考電壓，需先設定 analogReference(EXTERNAL)，直接餵 5V 落 AREF 唔會有事但餵高過 5V 會燒。