請問如何設計紅外線遙控器(發射端)電路? |
答題得分者是:happosai
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haman
中階會員 發表:46 回覆:137 積分:56 註冊:2005-03-10 發送簡訊給我 |
小弟從沒玩過紅外線相關電路,因此問的問題都是很基本的,請各位大大見諒^^"
這個想法來自於下面這篇文章… http://forum.pentaxfans.net/showthread.php?t=46256 小弟想問的問題是,一般紅外線遙控器的電路是如何設計的? http://sourceforge.net/project/showfiles.php?group_id=131383 從個聯結裡的source code看到這段資料… How it works: The remote control generates a series of IR pulses as shown below. The 'on'- pulses are modulated at 38kHz. ||||||||||||| ||| ||| ||| ||| ||| ||| ||| 38kHz ---> ||||||||||||| ||| ||| ||| ||| ||| ||| ||| modulation _|||||||||||||_________|||___|||___|||___|||___|||___|||___|||_ duration [ms] | 13 | 3 |1| 1 |1| 1 |1| 1 |1| 1 |1| 1 |1| 1 |1| This waveform is approximated in the Palm device by setting the baud rate to 38000 and sending sequences of characters of all ones or all zeros to the IR UART. The end result is not exactly the same, but it seems to work fine. This method has the advantage that the PalmOS API can be used and direct hardware access can be avoided. This means it should be compatible with a range of devices. 若我不按正規做法,以1ms為單位發送信號,接收端可以正常接收嗎? 如果可行,那duration [ms] | 13 | 3 |1| 1 |1| 1 |1| 1 |1| 1 |1| 1 |1| 1 |1|一般都是放在哪? 小弟想過用8051來控制,會不會有點大材小用?而且8051需吃到5v的電壓,以遙控器來說,好像有點吃電 若上述做法不可行,按正規做法,又該如何設計電路呢? |
happosai
高階會員 發表:93 回覆:228 積分:109 註冊:2002-09-15 發送簡訊給我 |
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