這周學習輸出設備.

課堂筆記

RGB LED

LED 點陣

Charlieplexing

LCD

44780

視頻：arduino-tvout，Thinner-Client

揚聲器

MOSFET 場效應晶體管- The metal–oxide–semiconductor field-effect transistor

• floating gates
• gate resistors 門電阻
• low-pass filters 低通濾波器
• class D amplifiers

馬達

brush DC motor

brushless DC motor (BLDC)

servo motor

stepper motor: unipolar, bipolar

實踐作業：給微控制器電路板增加輸出元件

電路板設計

用 ERC 和 DRC 工具檢查錯誤。確保沒有錯誤後，導出黑白 png 文件。

電路設計源文件

電路板製作

依舊是用 Roland SMR-20 雕刻電路板。

1/64 刀頭刻線路， 1/32 刀頭切邊緣。

焊元件

然後燒程序

make -f hello.RGB.45.make

sudo make -f hello.RGB.45.make program-usbtiny

avr-objcopy -O ihex hello.RGB.45.out hello.RGB.45.c.hex;n avr-size --mcu=attiny45 --format=avr hello.RGB.45.outnAVR Memory Usagen----------------nDevice: attiny45nnProgram: 338 bytes (8.3% Full)n(.text + .data + .bootloader)nnData: 0 bytes (0.0% Full)n(.data + .bss + .noinit)nnnavrdude -p t45 -P usb -c usbtiny -U flash:w:hello.RGB.45.c.hexnnavrdude: AVR device initialized and ready to accept instructionsnnReading | ################################################## | 100% 0.01snnavrdude: Device signature = 0x1e9206navrdude: NOTE: "flash" memory has been specified, an erase cycle will be performedn To disable this feature, specify the -D option.navrdude: erasing chipnavrdude: reading input file "hello.RGB.45.c.hex"navrdude: input file hello.RGB.45.c.hex auto detected as Intel Hexnavrdude: writing flash (338 bytes):nnWriting | ################################################## | 100% 0.49snnavrdude: 338 bytes of flash writtennavrdude: verifying flash memory against hello.RGB.45.c.hex:navrdude: load data flash data from input file hello.RGB.45.c.hex:navrdude: input file hello.RGB.45.c.hex auto detected as Intel Hexnavrdude: input file hello.RGB.45.c.hex contains 338 bytesnavrdude: reading on-chip flash data:nnReading | ################################################## | 100% 0.72snnavrdude: verifying ...navrdude: 338 bytes of flash verifiednnavrdude: safemode: Fuses OK (H:FF, E:DF, L:62)nnavrdude done. Thank you.n

編程

在 Arduino 裡面寫程序。要先選好 ATtiny 板子，ATtiny45 晶元和 8 MHz internal clock。

int led1 = 1; // the PWM pin the LED is attached tonint led2 = 2;nint led3 = 0;nint brightness = 0; // how bright the LED isnint fadeAmount = 5; // how many points to fade the LED bynn// the setup routine runs once when you press reset:nvoid setup() {n // declare pin 1,2,3 to be an output:n pinMode(led1, OUTPUT);n pinMode(led2, OUTPUT);n pinMode(led3, OUTPUT);n}nn// the loop routine runs over and over again forever:nvoid loop() {n // set the brightness of pin 1,2,3:n analogWrite(led1, brightness);n analogWrite(led2, brightness);n analogWrite(led3, brightness);nn // change the brightness for next time through the loop:n brightness = brightness + fadeAmount;nn // reverse the direction of the fading at the ends of the fade:n if (brightness == 0 || brightness == 255) {n fadeAmount = -fadeAmount ;n }n // wait for 30 milliseconds to see the dimming effectn delay(30);n}n

代碼下載.

程序寫好之後， Burn Bootloader 上傳到電路板上。LED 開始工作：

Video

課程資源

• Fab Academy 2016 課表
• Week13 課程視頻
• Week13 課程大綱
• 我的英文筆記 Gitbook
• 公眾號文章列表

專欄文章

• Fab Academy 第一周：怎樣在一周內建好自己的網站

• Fab Academy 第二周：CAD 三維設計

• Fab Academy 第三周：機器切割

• Fab Academy 第四周：製作電路板

• Fab Academy 第五周：3D 掃描和列印

• Fab Academy 第六周：電路設計基礎
• Fab Academy 第七周：數控機器
• Fab Academy 第八周：嵌入式編程
• Fab Academy 第九周：機械設計
• Fab Academy 第十周：機器設計

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• Fab Academy 第十二周：模具和鑄件