Intelligent Automated Inspection Laboratory and Robotic Embedded Systems Lab
This blog is daily record about paper or research ME712-2 and EM330 done.
Wednesday, August 26, 2009
[EM330] How to convert PWM signal to DAC voltage?
[Purpose]
當你想要控制馬達Driver的速度時,你需要輸入0~5V的訊號給Driver(電壓愈高,馬達轉愈快),可是PIC16或PIC18只有PWM信號輸出,沒有
低速
的DAC (高速的DAC須外掛 SPI , I2C等界面的晶片)?
[Solution]
使用R-2R電阻電路,如圖,最簡單。
2. 使用OP +RC。
[Reference]
http://ww1.microchip.com/downloads/e...tes/00538c.pdf
http://ww1.microchip.com/downloads/e...tes/00655a.pdf
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