å¯ä»¥ç¹äº®ï¼ä½æ¯å¯è½åå¨äº®åº¦ä¸çä¸åã
1ãLEDççµåä¸åå家ççµåä¼æä¸äºå·®å¼ï¼LEDçµåèå´ä¸è¬æ¯2.8-3.5Vä¹é´ãèå·¥ä½çµåå
é¢å®çµåæ¯æåºå«çã
2ãå¦æLEDé¢å®çµåæ¯3.3Vï¼é£ä¹3.3Vçæ¶åæ¯è½å¤è¾¾å°æ£å¸¸äº®åº¦çãä½æ¯å¦æå·¥ä½çµåæ¯3.3Vï¼é£ä¹æå¯è½çµåè¶
è¿äºLEDçé¢å®çµåæè
è¿æ²¡æè¾¾å°LEDçé¢å®çµåã
3ãLEDæ¯çµæµåå¨ä»¶ï¼çµåååå¾å°ï¼å¯è½å¯¼è´çµæµååå¾å¤§ãæ¯å¦å¤§åççLEDçµåä»3.2Vååå°3.3Vï¼å¯è½çµæµååäº100mA以ä¸ççã
4ãéæµçµé»ç计ç®ï¼é¦å
è¦æµè¯LEDè¾¾å°æ 称çµæµæ¶ççµåãæ¯å¦æ¯3.2Væ¶ï¼çµæµæ¯350毫å®ãé£ä¹å·¥ä½çµå3.3Vï¼å°±è¿æ0.1Vççµåéè¦çµé»æ¥æ¶èãè¿æ¶çµé»çé»å¼åºè¯¥æ¯ 0.1V/0.35A=0.286欧å§ï¼èçµé»çåçåºè¯¥æ¯0.1*0.35=0.035Wï¼æ以ç¨1/8Wççµé»å°±å¯ä»¥äºã