Lesson 4--Microduino "LED Brightness and PWM" - 版本历史

2015年7月13日 (一) 03:02 Changliu818@yahoo.com

2015-07-13T03:02:48Z

Changliu818@yahoo.com：Changliu818@yahoo.com moved page Lesson 4--The button PWM control of LED brightness to Lesson 4--Microduino "LED Brightness and PWM"

2015-07-12T21:58:19Z

Changliu818@yahoo.com moved page Lesson 4--The button PWM control of LED brightness to Lesson 4--Microduino "LED Brightness and PWM"

2233636763@qq.com：photo added

2015-07-03T06:22:08Z

photo added

2233636763@qq.com：photo added

2015-07-03T06:20:53Z

photo added

2233636763@qq.com：photo added

2015-07-03T06:19:33Z

photo added

2014年3月2日 (日) 14:19 Pkj

2014-03-02T14:19:58Z

2014年2月16日 (日) 07:54 Jasonsheng

2014-02-16T07:54:49Z

Jasonsheng：Created page with "{| style="width: 800px;" |- | ==Objective== LED has only two states on and off in other three experiment, now through button realize LED brightness light gradually and gradual..."

2014-02-10T00:54:19Z

Created page with "{| style="width: 800px;" |- | ==Objective== LED has only two states on and off in other three experiment, now through button realize LED brightness light gradually and gradual..."

新页面

{| style="width: 800px;"
|-
|
==Objective==
LED has only two states on and off in other three experiment, now through button realize LED brightness light gradually and gradually out
That is PWM pulse width modulation. Adjusting digital signal (" 0 ", "1") within a period of time that is the time of the duty ratio, high level "1", the longer and more bright.

Detailed information for PWM, please refer to：
http://www.geek-workshop.com/thread-125-1-1.html

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''
*Other hardware equipment
**Breadboard Jumper one box
**Breadboard one piece
**LED Light-emitting diodes one
**220ohm resistor one
**Button one
**USB Data cable one

==Experimental schematic==
[[File:第四课-pwm原理图.jpg|600px|center|thumb]]
Buttons are used with internal pull-up and external pull-down, then connect to the digital I/O port D0-D13.
PWM must use I/O port D3,D5,56,D9,D10 and D11.

==Program==
<source lang="cpp">
int n=0;
void setup ()
{
pinMode(2,INPUT);
pinMode(7,INPUT_PULLUP);//Set to internal pull-up
pinMode(11,OUTPUT);//The PWM only can use I/O port 3、5、11、9、10、11
}

void loop()
{
int up =digitalRead(2); //Read port 2's state
int down = digitalRead(7); //Read port 7's state
if (up==HIGH)
{
n=n+5;
if (n>=255) {
n=255;
} //The max limitation is 255
analogWrite(11,n); //Using PWM control the output of port 11, the range of the variable n is 0-255
delay (300);
}
if (down==LOW)
{
n=n-5;
if (n<=0) {
n=0;
}
analogWrite(11,n); //Using PWM control the output of port 11, the range of the variable n is 0-255
delay (300);
}
}
</source>
===analogWrite（）usage===
*Usage：Write the simulation value to the specified pin
*grammar：analogWrite(pin, val)，pin：Microduino I/O port number；val：values from 0 to 255

==Result==
Left button to make LED brightness progressively decreasing, and the right button to make LED brightness incremental.
==Video==
|}

←上一版本		2015年7月3日 (五) 06:19的版本
第21行：		第21行：
	**USB Data cable one		**USB Data cable one

		+
		+	[[File:lesson3All1.jpg\|600px\|center\|thumb]]

	==Experimental schematic==		==Experimental schematic==

@@ 第1行： / 第1行： @@
-{{Language|Lesson_4--The_button_PWM_control_of_LED_brightness}}
+{{Language|第四课--按钮PWM控制LED亮度}}
 {| style="width: 800px;"
 |-

@@ 第4行： / 第4行： @@
+|
 ==Objective==
-LED has only two states on and off in other three experiment, now through button realize LED brightness light gradually and gradually out
+In the previous three lessons, the LED was either on or off. In this lesson, you will learn how to control an LED's brightness using a button and PWM. PWM stands for pulse width modulation. The circuit adjusts the ratio of digital signals ("0", "1") to create a certain brightness. For example, if there are more 1's (HIGH), then the LED seems brighter.
 ==Equipment==
@@ 第14行： / 第10行： @@
 *'''[[Microduino-FT232R]]'''
 *Other hardware equipment
-**Breadboard Jumper            one box
+**1x Box of breadboard jumper wires
-**Breadboard  	               one piece
+**1x Breadboard
-**LED Light-emitting diodes    one
+**1x LED
-**220ohm resistor 	           one
+**1x 220ohm resistor
-**Button                       one
+**1x Button
-**USB Data cable               one
+**1x USB Data cable
 [[File:lesson3All1.jpg|600px|center|thumb]]
-==Experimental schematic==
+==Experiment Schematic==
 [[File:pwm schematic.jpg|600px|center|thumb]]
-Buttons are used with internal pull-up and external pull-down, then connect to the digital I/O port D0-D13.
+One button is connected using internal pull-up and the other using external pull-down. They are then connected to I/O ports D0~D13. For the [[Microduino-Core]], only D3, D5, D6, D9, D10, and D11 support PWM, so the user must connect the LED to one of those ports.
 [[File:lesson3Setup1.jpg|600px|center|thumb]]
@@ 第38行： / 第33行： @@
    pinMode(2,INPUT);
    pinMode(7,INPUT_PULLUP);//Set to internal pull-up
-   pinMode(11,OUTPUT);//The PWM only can use I/O port 3、5、11、9、10、11
+   pinMode(11,OUTPUT);//PWM must use I/O ports 3、5、11、9、10、11
+}
@@ 第65行： / 第60行： @@
+}
 </source>
-===analogWrite（）usage===
+===analogWrite() usage===
-*Usage：Write the simulation value to the specified pin
+*Usage：Writes the simulation value to the specified pin
-*grammar：analogWrite(pin, val)，pin：Microduino I/O port number；val：values from 0 to 255
+*Parameters：analogWrite(pin, val)
 ==Result==
-Left button to make LED brightness progressively decreasing, and the right button to make LED brightness incremental.
+Left button increases LED brightness and right button decreases LED brightness.
 [[File:lesson3Result1.jpg|600px|center|thumb]]

←上一版本	2015年7月12日 (日) 21:58的版本
（没有差异）

@@ 第28行： / 第28行： @@
 Buttons are used with internal pull-up and external pull-down, then connect to the digital I/O port D0-D13.
 PWM must use I/O port D3,D5,56,D9,D10 and D11.
 ==Program==