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作者 theurgy 在 PTT [ Electronics ] 看板的留言(推文), 共24則
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8F推:黃光區吧 怕靜電才接的05/18 14:14
8F推:你的pic怎麼推的 用open collector的ic試試12/08 08:43
4F→:下午把MCU重焊一個還是不行 1F的方法我下午也想到了04/18 21:05
5F→:果然摸到一顆處理ETHERNET的ic燙燙的 解焊後量 果然是那顆04/18 21:07
6F→:但是整個阻抗還是太低,只有40ohm 正常要500多 看來還有地04/18 21:08
7F→:方燒掉.. 後來不管 直接燒BOOTLOADER進去 結果失敗 跟我04/18 21:10
8F→:說 FLASH MEMORY 的 MAKE CODE 跟DEVICE CODE 不合04/18 21:11
9F→:不多說直接重焊一顆FLASH 結果還是一樣,明天一顆一顆ic看04/18 21:12
10F→:哪邊燒掉好了04/18 21:12
3F推:FET好像有些拿掉了 然後頻率響應不再獨立一章 總之差很多11/09 12:55
4F→:開不成吧= =11/06 22:28
8F→:好主意 3310裡應該有?11/07 19:28
6F推:輸入端的訊號大小決定出來的電流 要多少 根據你的電路08/06 22:48
7F→:再從偏壓端(直流偏壓)取用 怎麼算的..你應該有算smith吧08/06 22:49
8F→:1的話 負載全看成電阻就對了 ic什麼的看輸入電阻08/06 22:53
25F推:你應該先看完電路學.. W=IV 手電筒負載也是電阻 會算吧..08/07 11:20
26F→:輸入電壓有輸入信號跟直流偏壓就工作電壓 功率是直流偏壓08/07 11:22
27F→:給的 id很大... 那就先進飽和區了阿 怎麼會燒08/07 11:24
28F推:不過你的偏壓如果很高id又大 超過那顆功率他就會死給你看08/07 11:32
29F→:總而言之怎麼決定電壓多大是看你自己要多大 自己設計08/07 11:34
30F→:另外如果妳說的是電器的額定電壓怎麼決定的 W=IV08/07 11:35
31F→:如果功率1000w 額定電壓110v W=(V^2)/R 因為電壓平方倍08/07 11:36
32F→:所以太小會達不到功率 太大會因為電流太大燒掉08/07 11:37
33F→:怎麼知道多大才可以動作的話 當然是看電路怎麼設計的阿..08/07 11:39
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