Lesson 8--Microduino "Pulse Recorder" - 版本历史

Changliu818@yahoo.com：/* Experiment Schematic */

2015-07-15T00:11:26Z

‎Experiment Schematic

Changliu818@yahoo.com：/* Result */

2015-07-13T22:25:52Z

‎Result

2015年7月13日 (一) 22:25 Changliu818@yahoo.com

2015-07-13T22:25:26Z

Changliu818@yahoo.com：Changliu818@yahoo.com moved page Lesson 8--Pulse timing (check how long you hold down the switch) to Lesson 8--Microduino "Pulse Recorder"

2015-07-13T11:29:14Z

Changliu818@yahoo.com moved page Lesson 8--Pulse timing (check how long you hold down the switch) to Lesson 8--Microduino "Pulse Recorder"

2233636763@qq.com：photo added

2015-07-03T06:32:04Z

photo added

2233636763@qq.com：photo added

2015-07-03T06:30:57Z

photo added

2233636763@qq.com：extra "}" at the end of the program

2015-07-02T10:22:58Z

extra "}" at the end of the program

Pkj：/* Video */

2014-05-13T02:12:30Z

‎Video

Pkj：/* Objective */

2014-05-05T09:00:12Z

‎Objective

Pkj：/* Objective */

2014-05-05T08:58:41Z

‎Objective

@@ 第27行： / 第27行： @@
 ==Experiment Schematic==
 [[File:lesson8-schematic.jpg|600px|center|thumb]]
-Using the internal pull-up, also connect an external ceramic capacitor for stabilization.
+This schematic uses the internal pull-up. We also connected an external ceramic capacitor for stabilization.
 ==Program==

@@ 第76行： / 第76行： @@
 ==Result==
-For stabilization, add a ceramic capacitor in the signal change port. You can see be able to see better results.
+For stabilization, add a ceramic capacitor in the signal change port. You will be able to see better results.
 [[File:lesson8-capacitance.jpg|600px|center|thumb]]
 [[File:lesson8Result.jpg|600px|center|thumb]]

@@ 第4行： / 第4行： @@
+|
 ==Objective==
-The lesson shows us how to use the button and aviod shaking issue. The solution is to delay time.
+In lesson 3, you learned how to use a button and avoid the issue of electrical noise. The solution was to add a short delay.
-But this solution has a disadvantage. As to the delay time, it all depends since it takes different time for everyone to press the button.
+However, this solution has a disadvantage. Different people will take different amounts of time to press a button. That means the delay must be different for different people, too.
-This lesson will introduce how to get the time to press a button, the program uses pulse timing calculation.
+This lesson will teach you how to get the duration that a button is pressed down. This program uses pulse timing calculation.
-Besides that, you can learn how to use arduino's serial and monitor the data using serial.
+In addition, you will learn about Arduino's serial port to monitor the data.
 ==Equipment==
@@ 第13行： / 第13行： @@
 *'''[[Microduino-FT232R]]'''
 *Other hardware equipment
-**Breadboard Jumper            one box
+**1x Box of breadboard jumper wires
-**Breadboard  	               one piece
+**1x Breadboard
-**Button                       one
+**1x Ceramic capacitor
-**USB Data cable               one
+**1x Button
 [[File:lesson8All.jpg|600px|center|thumb]]
 ==Pulse==
-Pulse is a process that a physical quantity quickly retun to its initial state after a short time mutation.
+Pulse is a rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value.
-In Microduino, pulse just a digital signal which changed between high and low in cyclical.
+In Microduino, pulse is simply a digital signal which changes between high and low in a cyclical pattern. Pulse timing is often used to calculate the speed in electronic components.
-==Experimental schematic==
+==Experiment Schematic==
 [[File:lesson8-schematic.jpg|600px|center|thumb]]
-Using the internal pull-up, external 104 ceramic capacitors for stabilization.
+Using the internal pull-up, also connect an external ceramic capacitor for stabilization.
 ==Program==
@@ 第43行： / 第43行： @@
+{
      //Read low pulse from the pin, the maximum pulse interval is 60 seconds, and assign the result to the variable time1
-   time1= pulseIn(pin, LOW,60000000)/1000;//Convert the time to ms
+   time1= pulseIn(pin, LOW, 60000000)/1000;        //Convert the time to ms
-   Serial.print(time1); //Output the time1 by serial
+   Serial.print(time1);                            //Output the time1 by serial
    Serial.print("ms  ");
-   time2= pulseIn(pin, LOW,60000000)/1000.0;//Convert the time to ms
+   time2= pulseIn(pin, LOW,60000000)/1000.0;       //Convert the time to ms
-   Serial.print(time2); //Output the time1 by serial
+   Serial.print(time2);                            //Output time1 by serial
-   Serial.println("ms");//Through the serial port to print out the unit and wrap to a new line to output the next value.
+   Serial.println("ms");                           //Output time2 by serial and start a new line
+}
 </source>
-==Serial monitoring==
+==Serial Monitoring==
 ===Open the serial port monitor===
-*Click the Serial Monitor button, pop-up the serial monitor interface.
+*Click the Serial Monitor button to pop-up the serial monitor interface.
 [[File:lesson8-serialmonitor.jpg|600px|center|thumb]]
 [[File:lesson8-serialwindow.jpg|600px|center|thumb]]
 *Note：
-**In order to using serial, you need add sentence "Serial.begin(xxxx)" in function setup()，xxxx is the baud rate;
+**In order to use serial, you must add the line "Serial.begin(xxxx)" in function setup()，xxxx is the baud rate. The baud rate is the rate at which data is transferred to your computer from the [[Microduino-Core]]. The units is bits per second.
-**The baud rate should be same when using the serial monitor. The baud rate is a measure of the signal transmission rate. The baud rate is not a good match, it is easy garbled.
+**It is important that the baud rate should be set to the same number when using the serial monitor. If they do not match up, you will only see gibberish on your serial monitor.
-*When convert the unit, need pat attention to the data type：
+*When converting units (as in the case of microseconds to milliseconds), you need to pay attention to the data types:
 [[File:lesson-calculate.jpg|600px|center|thumb]]
-===PulseIn（）function===
+===pulseIn() usage===
-*Function：read a pulse(HIGH or LOW) from a pin. Such as, if the value is HIGHT, pulseIn() will start timer when pin is HIGH, then stop the timer after pin change to LOW.
+*Function：Reads a pulse (either HIGH or LOW) on a pin. For example, if value is HIGH, pulseIn() waits for the pin to go HIGH, starts timing, then waits for the pin to go LOW and stops timing. Returns the length of the pulse in microseconds. Gives up and returns 0 if no pulse starts within a specified time out. This function is accurate for pulse ranges of 10microseconds ~ 3mins. (1s=1,000 milliseconds=1,000,000 microseconds)
-The return value is the pulse time, unit is us. The timer range is 10us ~ 3mins. (1s=1000ms=1000000us)
+*Syntax：
 **pulseIn(pin, value)
 **pulseIn(pin, value, timeout)
 *Parameters：
-**pin: pulse timing I/O port（int）
+**pin: the number of the pin on which you want to read the pulse. (int)
-**value:pulse type,HIGH or LOW（int）
+**value: type of pulse to read: either HIGH or LOW. (int)
-**timeout (optional)：Wait timer for pulse timing，unit is us, the default value is 1s.（unsigned long）
+**timeout (optional)：the number of microseconds to wait for the pulse to start; default is one second (unsigned long)
 ==Result==
-For stabilization，add a 104 ceramic capacitors in signal change port, you can see a better result.
+For stabilization, add a ceramic capacitor in the signal change port. You can see be able to see better results.
 [[File:lesson8-capacitance.jpg|600px|center|thumb]]
 [[File:lesson8Result.jpg|600px|center|thumb]]
 ==Video==
 |}

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 For stabilization，add a 104 ceramic capacitors in signal change port, you can see a better result.
 [[File:lesson8-capacitance.jpg|600px|center|thumb]]
 ==Video==
 |}

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 **Button                       one
 **USB Data cable               one
 ==Pulse==

←上一版本	2015年7月13日 (一) 11:29的版本
（没有差异）

←上一版本		2014年5月13日 (二) 02:12的版本
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	==Video==		==Video==
	\|}		\|}
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		+	https://www.youtube.com/watch?v=Ge52Sx_8XeU