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作者 beagle 在 PTT [ Electronics ] 看板的留言(推文), 共1245則
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1F→:連 Digi-key 也無庫存, 好像真的很稀有12/10 18:05
1F推:pin19 不就是 crystal in 嗎? 有沒有加電容?12/09 02:25
2F→:如果石英不起振當然整個單晶片都不會跑...12/09 02:28
3F→:對了, 請問各位這個問題要如何診斷? 我只會用示波器看...12/09 02:28
4F→:但是每次程式不跑就搬示波器出來實在很累, 舊型的好重12/09 02:29
13F→:可以的話用示波器量量看... 你有 reset 嗎?12/09 14:12
3F→:但還是需要知道 0 Ohm 承受多大電流時會燒掉12/03 18:19
4F→:比如說, 被拿來 short 電源開關, 可能有 3A 電流經過12/03 18:20
5F→:然後本來有個搖頭開關或翹板開關就不打件這樣...12/03 18:20
4F推:Rising time < 5ns 加上線長超過 50cm 就要考慮高頻效應12/01 11:03
5F→:你的狀況在邊緣,再說排線是整排平行,說不定還會 crosstalk12/01 11:04
6F→:實際狀況不清楚只能瞎猜...12/01 11:05
1F→:Xilinx 有出新型的 IC 取代啊11/26 17:06
2F→:boost 的線路要設計好才不會 bounce, 單點接地是一定要的11/23 23:31
1F推:沒這種東西, 你要訂做轉接板是可以, 不過一般都是買一條11/20 23:57
2F→:比較長的 FFC 來代替...11/20 23:57
1F推:電池噴不出 3000A 的電流11/18 22:42
1F推:誰說 LED 是線性電阻的11/18 22:16
1F推:這應該是阻抗匹配問題, 波形被反射回去了...11/06 11:04
2F→:高頻訊號的問題和直流/超低頻的狀況很不一樣11/06 11:04