Difference between revisions of "BakeBit - Rotary Angle Sensor"

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==Introduction==
 
==Introduction==
 
[[File:BakeBit - Rotary Angle Senso.jpg|thumb|Rotary Angle Senso]]
 
[[File:BakeBit - Rotary Angle Senso.jpg|thumb|Rotary Angle Senso]]
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*BakeBit - Rotary Angle Senso是一个旋转角度传感器模块，模块使用了一个旋转电位器。通过改变接入电路部分电阻线的长度来改变接入部分的电阻值，从而改变输出端的分压。
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* The BakeBit - Rotary Angle Sensor module is a rotary sensor module. It acts as a variable resistor or rheostat.When the nub is rotated the resistance will change.
  
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==特性==
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==Hardware Spec==
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* 使用标准的2.0mm 4 Pin BakeBit接口
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* Standard 2.0mm pitch 4-Pin BakeBit Interface
 
[[File:BakeBit - Rotary Angle Senso_PCB.png | frameless|320px|BakeBit - Rotary Angle Senso]]
 
[[File:BakeBit - Rotary Angle Senso_PCB.png | frameless|320px|BakeBit - Rotary Angle Senso]]
  
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* 引脚说明:
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* Pin Description:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
−
|名称 || 描述
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|Pin || Description
 
|-
 
|-
−
|GND  || 地
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|GND  || Ground
 
|-
 
|-
−
|5V    || 电源5V
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|5V    || 5V Supply Voltage
 
|-
 
|-
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|NC    || 空
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|NC    || Not Connected
 
|-
 
|-
−
|SIG  || 信号
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|SIG  || Signal
 
|}
 
|}
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== 示例程序(1)：LED Fade ==
 
  
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这个项目将使用[[BakeBit - Rotary Angle Sensor]]模块，来动态调节LED的亮度。
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== Code Sample(1): LED Fade ==
  
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=== 硬件连接 ===
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A [[BakeBit - Rotary Angle Sensor]] module is needed in this test case.
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简单的将 LED 模块插入 D5接口，将 [[BakeBit - Rotary Angle Sensor]] 插入 A0接口，如下面这样：
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 +
=== Hardware Setup ===
 +
Connect the LED module to the NanoHat Hub's D5 and the [[BakeBit - Rotary Angle Sensor]] module to the NanoHat Hub's A0:
  
 
::{| class="wikitable"
 
::{| class="wikitable"
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|}
 
|}
  
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=== 示例源代码 ===
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=== Source Code ===
  
 
<syntaxhighlight lang="python">
 
<syntaxhighlight lang="python">
Line 88: Line 89:
 
[https://github.com/friendlyarm/BakeBit/blob/master/Software/Python/bakebit_rotary_angle_sensor.py Github]
 
[https://github.com/friendlyarm/BakeBit/blob/master/Software/Python/bakebit_rotary_angle_sensor.py Github]
  
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=== 运行示例 ===
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=== Run Code Sample ===
−
+
 
−
假设你已经参考[http://wiki.friendlyarm.com/bakebit bakebit教程]安装了BakeBit源代码，<br />
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Before you run the code sample you need to follow the steps in [http://wiki.friendlyarm.com/bakebit bakebit tutorial] to install the BakeBit package.<br />
−
要运行示例程序，可以在开发板上进入 BakeBit/Software/Python目录,运行bakebit_rotary_angle_sensor.py:
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Enter the "BakeBit/Software/Python" directory and run the "bakebit_rotary_angle_sensor.py" program:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
cd ~/BakeBit/Software/Python
 
cd ~/BakeBit/Software/Python
Line 97: Line 98:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
 +
=== Observation ===
  
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=== 运行结果 ===
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When you rotate the rotary angle sensor module the LED’s luminance will change accordingly.
  
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旋转电位器，LED亮度会随着电位器的角度变化而变化。
+
== Code Sample(2): Servo and Rotary Angle Sensor ==
 +
This code sample shows how to control a servo with the Rotary Angle Sensor module.<br />
 +
A [[BakeBit - Servo]] is needed in this test case. For more details about the servo module refer to the [[BakeBit - Servo]] page.
  
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== 示例程序(2)：Servo and Rotary Angle Sensor ==
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== Code Sample(3): LED Bar and Rotary Angle Sensor ==
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这个示例演示用电位器(Rotary Angle Sensor)来控制舵机的转动。<br />
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This code sample shows how to adjust sound volume with the rotary angle sensor module.<br />
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该示例是配合[[BakeBit - Servo]]来实现的，可参考[[BakeBit - Servo]]页面。
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A [[BakeBit - LED Bar]] is needed in this test case. For more details about the LED Bar refer to the [[BakeBit - LED Bar]] page.
  
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== 示例程序(3)：LED Bar and Rotary Angle Sensor ==
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==Resources==
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这个示例实现类拟音量调节的效果，用到电位器模块和LED Bar。<br />
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该示例是配合[[BakeBit - LED Bar]]来实现的，可参考[[BakeBit - LED Bar]]页面。
+
−
 
+
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==相关资料==
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*[Schematic]([http://wiki.friendlyarm.com/wiki/images/0/01/03-SCHEMATIC_Rotary_Angle_Senso.pdf BakeBit - Rotary Angle Sensor.pdf])
 
*[Schematic]([http://wiki.friendlyarm.com/wiki/images/0/01/03-SCHEMATIC_Rotary_Angle_Senso.pdf BakeBit - Rotary Angle Sensor.pdf])
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*[BakeBit Github项目](https://github.com/friendlyarm/BakeBit)
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*[BakeBit Github Project Page](https://github.com/friendlyarm/BakeBit)
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*[BakeBit Starter Kit手册](http://wiki.friendlyarm.com/bakebit/bakebit_starter_kit_manual_cn.pdf)
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*[BakeBit Starter Kit User's Manual](http://wiki.friendlyarm.com/bakebit/bakebit_starter_kit_manual_en.pdf)
 +
 
 +
==Update Log==
 +
===December-13-2016===
 +
* Released English version
 +
 
 +
===Jan-19-2017===
 +
* Renamed "NEO-Hub" to "NanoHat-Hub"
 +
 
 +
===Jan-20-2017===
 +
* Renamed "NanoHat-Hub" to "NanoHat Hub"

Latest revision as of 08:16, 20 January 2017

查看中文

1 Introduction

Rotary Angle Senso
  • The BakeBit - Rotary Angle Sensor module is a rotary sensor module. It acts as a variable resistor or rheostat.When the nub is rotated the resistance will change.

2 Hardware Spec

  • Standard 2.0mm pitch 4-Pin BakeBit Interface

BakeBit - Rotary Angle Senso

  • Pin Description:
Pin Description
GND Ground
5V 5V Supply Voltage
NC Not Connected
SIG Signal

3 Code Sample(1): LED Fade

A BakeBit - Rotary Angle Sensor module is needed in this test case.

3.1 Hardware Setup

Connect the LED module to the NanoHat Hub's D5 and the BakeBit - Rotary Angle Sensor module to the NanoHat Hub's A0:

LED Fade-1.jpg LED Fade-2.jpg

3.2 Source Code

import time
import bakebit
 
# Connect the BakeBit Rotary Angle Sensor to analog port A0
# SIG,NC,VCC,GND
potentiometer = 0
 
# Connect the LED to digital port D5
# SIG,NC,VCC,GND
led = 5
 
bakebit.pinMode(potentiometer,"INPUT")
bakebit.pinMode(led,"OUTPUT")
time.sleep(1)
 
# Reference voltage of ADC is 5v
adc_ref = 5
 
# Vcc of the BakeBit interface is normally 5v
bakebit_vcc = 5
 
# Full value of the rotary angle is 300 degrees, as per it's specs (0 to 300)
full_angle = 300
 
while True:
    try:
        # Read sensor value from potentiometer
        sensor_value = bakebit.analogRead(potentiometer)
 
        # Calculate voltage
        voltage = round((float)(sensor_value) * adc_ref / 1023, 2)
 
        # Calculate rotation in degrees (0 to 300)
        degrees = round((voltage * full_angle) / bakebit_vcc, 2)
 
        # Calculate LED brightess (0 to 255) from degrees (0 to 300)
        brightness = int(degrees / full_angle * 255)
 
        # Give PWM output to LED
        bakebit.analogWrite(led,brightness)
 
        print("sensor_value = %d voltage = %.2f degrees = %.1f brightness = %d" %(sensor_value, voltage, degrees, brightness))
    except KeyboardInterrupt:
        bakebit.analogWrite(led,0)
        break
    except IOError:
        print ("Error")

Github

3.3 Run Code Sample

Before you run the code sample you need to follow the steps in bakebit tutorial to install the BakeBit package.
Enter the "BakeBit/Software/Python" directory and run the "bakebit_rotary_angle_sensor.py" program: 

cd ~/BakeBit/Software/Python
sudo python bakebit_rotary_angle_sensor.py

3.4 Observation

When you rotate the rotary angle sensor module the LED’s luminance will change accordingly.

4 Code Sample(2): Servo and Rotary Angle Sensor

This code sample shows how to control a servo with the Rotary Angle Sensor module.
A BakeBit - Servo is needed in this test case. For more details about the servo module refer to the BakeBit - Servo page.

5 Code Sample(3): LED Bar and Rotary Angle Sensor

This code sample shows how to adjust sound volume with the rotary angle sensor module.
A BakeBit - LED Bar is needed in this test case. For more details about the LED Bar refer to the BakeBit - LED Bar page.

6 Resources

7 Update Log

7.1 December-13-2016

  • Released English version

7.2 Jan-19-2017

  • Renamed "NEO-Hub" to "NanoHat-Hub"

7.3 Jan-20-2017

  • Renamed "NanoHat-Hub" to "NanoHat Hub"
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