Lesson 1--Microduino "LED and a Breadboard" - 版本历史

2015年7月14日 (二) 17:30 Changliu818@yahoo.com

2015-07-14T17:30:30Z

Changliu818@yahoo.com：/* Equipment */

2015-07-14T17:23:24Z

‎Equipment

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

2015-07-12T09:44:01Z

‎Experimental Schematic

2015年7月12日 (日) 09:21 Changliu818@yahoo.com

2015-07-12T09:21:47Z

显示更改

Changliu818@yahoo.com：Changliu818@yahoo.com moved page Lesson 1--LED flashes experiments (using bread board) to Lesson 1--Microduino "LED and a Breadboard"

2015-07-12T05:41:06Z

Changliu818@yahoo.com moved page Lesson 1--LED flashes experiments (using bread board) to Lesson 1--Microduino "LED and a Breadboard"

1304410487@qq.com：/* Result */

2015-07-02T09:24:15Z

‎Result

1304410487@qq.com：/* Experimental schematic */

2015-07-02T09:23:33Z

‎Experimental schematic

1304410487@qq.com：/* Equipment */

2015-07-02T09:22:42Z

‎Equipment

southwolf：Fix typo "milles"

2014-07-15T00:22:51Z

Fix typo "milles"

Pkj：/* Resistor and LED */

2014-05-20T07:52:28Z

‎Resistor and LED

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 </source>
-It is better to use millis() than the delay() function since it uses less resources and causes fewer delays on the system.
+Although the code looks more complicated when using millis(), it is more efficient than the delay() function since it uses less resources and causes fewer delays on the system. It may not be of concern for now and you are free to use delay(), but when projects get large, using delay() may cause unintended lag.
 ==How To Download The Program==
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 [[File:boardtype.jpg|600px|center|thumb]]
 *Choose COM port in "tools". The serial port is different for everyone's computer. It is usually ports 3-5. The COM port is in "properties"->"device manager" in your computer. You also can double-click "Advanced" to change the COM port by port settings.
 *Compile and then download program
 [[File:compile.jpg|600px|center|thumb]]
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 ==Result==
-After the download, you can see the LED flash once every second.
+After the download, you can see the LED flash once every second!
 [[File:lesson1OK.jpg|600px|center|thumb]]

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 *'''[[Microduino-FT232R]]'''
-This module is used to upload your program into the core. You can stack it directly onto the Microduino-Core or Microduino-Core+ and communicate with your PC. Similar to many smartphones, it uses a MicroUSB as the download port.
+This module is used to upload your program into the core. You can stack it directly onto the Microduino-Core or Microduino-Core+ and communicate with your PC. Similar to many smartphones, it uses a MicroUSB as the download/upload port.
 *Other hardware equipment:
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 ===Breadboard===
-For the two long strips in the middle，every 5 points are connected vertically. For the four strips running along the outer board, every 25 points are connected horizontally.  For the outer two strips, one row is used for GND and the other is for VCC.
+In the breadboard provided in the picture, for the two long strips in the middle，every 5 points are connected vertically. For the four strips running along the outer board, every 25 points are connected horizontally.  For the outer two strips, one row is usually connected to GND and the other to VCC.
 <br><br>
-Note: In some breadboards, all 50 points are connected together in the outer strips. Be aware of the connection format when working on projects.
+Note: In some breadboards, all 50 points are connected together in the outer strips. The breadboard provided in the Microduino Basic Tutorial Kit has 30 points all connected together in the outer two strips. Be aware of the connection format when working on projects.
 [[File:breadboard.jpg|600px|center|thumb]]
 ===Resistor and LED===
-Resistors prevent your LED from being damaged by limiting the voltage supplied. Max voltage for red and green LEDs is 1.8 ~ 2.4V, blue and white is 2.8 ~ 4.2V. 3mmLED rated current is 1 ~ 10mA, 5mmLED rated current is 5 ~ 25mA, and 10mmLED rated current is 25 ~ 100mA. Use Resistance = Voltage / Current  to calculate the resistance. 200-400 ohms of resistance is usually adequate.
+Resistors prevent your LED from being damaged by limiting the voltage supplied. Max voltage for red and green LEDs is 1.8 ~ 2.4V, blue and white is 2.8 ~ 4.2V. 3mmLED rated current is 1 ~ 10mA, 5mmLED rated current is 5 ~ 25mA, and 10mmLED rated current is 25 ~ 100mA. You can use Resistance = Voltage / Current  to calculate the resistance required. 200-400 ohms of resistance is usually adequate.
 '''How to Judge the Positive/Negative Ends of a LED Light'''
-Method One: Take a look inside the LED light. The pin with a bigger bracket is negative and the one with a smaller bracket is positive.
+*Method One: Take a look inside the LED light. The pin with a bigger bracket is negative and the one with a smaller bracket is positive.
-Method Two: For a new LED light, you can tell from the length of the pins. The longer pin is positive and and the shorter pin is negative.
+*Method Two: For a new LED light, you can tell from the length of the pins. The longer pin is positive and and the shorter pin is negative.
 '''Test a LED Light via a Multimeter'''
-When using the analog multimeter to test a diode, you must choose the "Rxl0k" slot since the voltage of the battery inside the multimeter is only 1.5V when the multimeter is under the "R×lk" slot, lower than the voltage drop of a 3V LED light. In that case, it is impossible to test LED lights no matter what connection method you adopt. While the analog multimeter is under the "R×l0k" slot, you can test the LED light for the voltage of the battery is about 9V(or 15V), higher than the voltage drop.
+When using an analog multimeter to test a diode, you must choose the "Rxl0k" slot since the voltage of the battery inside the multimeter is only 1.5V when the multimeter is under the "R×lk" slot, lower than the voltage drop of a 3V LED light. In that case, it is impossible to test LED lights no matter what connection method you adopt. While the analog multimeter is under the "R×l0k" slot, you can test the LED light for the voltage of the battery is about 9V(or 15V), higher than the voltage drop.
-Since the black probe of the analog multimeter shows positive and the red probe shows negative, you need to connect the black probe to the positive of the LED light and the red probe to the negative. If the LED light goes on, then it works.
+Since the black probe of the analog multimeter shows positive and the red probe shows negative, you need to connect the black probe to the positive of the LED light and the red probe to the negative. If the LED lights up, then it works.
-Different from the analog multimeter, the digital multimeter shows contrary electrode. Adopting right connection method, you can prove the LED is working when it lights up.
+Different from the analog multimeter, the digital multimeter shows contrary electrode. Adopting the right connection method, you will know the LED is working when it lights up.
 ==Experiment Schematic==

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 Different from the analog multimeter, the digital multimeter shows contrary electrode. Adopting right connection method, you can prove the LED is working when it lights up.
-==Experimental Schematic==
+==Experiment Schematic==
 There are two connection methods:

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 ==Result==
 After the download, you can see LED flashes once every 1s.
 ==Video==
 |}

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 There are two connection methods, one is that led cathode connects to GND, anode connects to Microduino digital I/O port 13, which is the high light led. The other method ist that led cathode connected Microduino digital I/O port 13, anode connects to VCC, so that low-level light led.
-[[File:schematic.jpg|600px|center|thumb]]
+[[File:lesson1Setup.jpg|600px|center|thumb]]
 ==Program==

←上一版本	2015年7月12日 (日) 05:41的版本
（没有差异）

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 **220ohm resistor 	       one
 **USB Data cable               one
 ===Breadboard===

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 </source>
-*Using function milles()：Return the number of milliseconds from start running Microduino program to now.
+*Using function millis()：Return the number of milliseconds from start running Microduino program to now.
 <source lang="cpp">
 int ledPin=13;

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 Test a LED Light via a Multimeter
-When using the analog multimeter to test a diode, you must choose the "Rxl0k" since the voltage of the battery inside the multimeter is only 1.5V when the multimeter is under the gear of "R×lk", lower than the voltage drop of a 3V LED light. In that case, it is impossible to test LED lights no matter what connection method you adopt. While the analog multimeter is under the gear of "R×l0k", you can test the LED light for the voltage of the battery is about 9V(or 15V), higher than the voltage drop.
+When using the analog multimeter to test a diode, you must choose the "Rxl0k" stall since the voltage of the battery inside the multimeter is only 1.5V when the multimeter is under the "R×lk" stall, lower than the voltage drop of a 3V LED light. In that case, it is impossible to test LED lights no matter what connection method you adopt. While the analog multimeter is under the "R×l0k" stall, you can test the LED light for the voltage of the battery is about 9V(or 15V), higher than the voltage drop.
 Since the black probe of the analog multimeter shows positive and the red probe shows negative, you need to connect the black probe to the positive of the LED light and the red probe to the negative. If the LED light goes on, then it works.