micro:bit 擴充板 -- Nexus:bit

適合初學者的最佳DIY機器人教育套件  --  Nexus:bit

Nexus:bit為一款針對micro:bit所做的模組化動力套件，它整合各種子元件並大幅簡化電路接線。擁有了 Nexus:bit再結合micro:bit 圖形化的積木編程，不論是新手或老手，都能快速打造出micro:bit 各種應用，包含無線遙控車、機械手臂、人型機器人....

micro:bit 具備圖形編程平台也支援python 語言撰寫。
Nexus:bit 功能描述

1. 擴充板具有獨立電源開關
2. 18650鋰電池座與18650充電系統
3. 具有電源指示燈及充電指示燈
4. 電池反接偵測(反接無法啓動電源)
5. 可以同時控制12個伺服馬達+2個直流馬達
6. RGB彩色 LED燈
7. 蜂鳴器
8. 振動器
9. 麥克風音量偵測 (可以調整霊敏度)
10. 超音波測距感測器連接腳座
11. micro:bit完整擴充腳位及額外I2C、SPI引腳
12. 5V/3V 輸出接腳
13. 香菇頭搖桿(上下左右及A,B兩按鍵)

Note: 當接入USB外部電源時，會自動切斷18650電池電源, Nexus:bit 電源會來自USB外部電源

Nexus:bit Shield v1.0

• USB External Power Supply with high current fuse protection
• Li-ion 18650 Battery Holder
• Li-ion 18650 charger system
• Short circuit protection
• Power On/Off switch with LED indicator (On: High-Brightness Green LED)
• PCA9685 (PWM for Servo Motor and RGB LED)
• Servo: PWM connectorx12
• RGB LED: PWM (PWM 8,9,10)
• DC Motor x2
• GPIO

• Buzzer  x1
• Vibratorx1
• LEDx1
• Micro:bit PWM/Digital Output pin
• Sound detection Module with a built-in potentiometer to adjust the sensitivity of the digital output pin.
• Edge connector
• Front interface for Joystick
• Analog pin P1 (X),P2(Y), Button A, Button B
• Front interface for ultrasonic distance sensor (HC-SR04)
• I2C connector x2
• SPI connector x1
• 5V/3V Output connectorx2

※Li-ion 18650 可以採購2000mAH~2500mAH以上

Nexus:bit 電子產品檢測認證  Safety

Nexus:bit Pinmap

Pin	Type	Function
0	Touch	Pad 0	P0 or Buzzer  (by Jumper)
1	Touch	Pad 1	Joystick AD
2	Touch	Pad 2	Joystick AD
3	Analog	Column 1	X
4	Analog	Column 2	X
5	Digital	Button A	Joystick Button A
6	Digital	Row 2	X
7	Digital	Row 1	X
8	Digital		Viberator
9	Digital	Row 3	X
10	Analog	Column 3	X
11	Digital	Button B	Joystick Button B
12	Digital		Microphone/LED1
13	Digital	SPI MOSI	SPI MOSI/M1A
14	Digital	SPI MISO	SPI MISO/ M1B
15	Digital	SPI SCK	SPI SCK/ M2A
16	Digital		SPI CE/ M2B
19	Digital	I2C SCL	I2C SCL for PCA9685
20	Digital	I2C SDA	I2C SDA for PCA9685

Nexus:bit 電路圖下載