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作者 beagle 在 PTT [ Electronics ] 看板的留言(推文), 共1245則
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7F→:有照片比較好辨認02/01 02:08
8F→:最好附比例尺如硬幣, 不然光這樣講實在認不出來...02/01 02:09
9F→:抱歉我看到照片了 ^^" 那個是電阻沒有錯02/01 02:09
10F→:電源 IC 是那些 R25 上方, 一邊三根腳一邊是小小散熱片的02/01 02:10
1F→:水泥電阻好像也只能耐 20W 而已01/23 15:53
3F推:的確有聽過為了資料保密, 故意把接到 Flash 的 bus "炒" 過01/23 07:38
4F→:這樣 Flash 被拔到別處去讀也不容易讀出有意義的資料來01/23 07:38
7F推:FPGA 開發板上次買最便宜的五千...01/19 12:35
8F→:照原PO說的設計晶片的服務,做到好大約兩千萬台幣,需時半年01/19 12:36
22F推:PCB 專案就便宜多了, 看複雜程度, 簡單的只要幾千元...01/21 14:16
1F推:已上件的主機板沒辦法這樣量...01/15 13:53
2F→:比如說 3.3V 和 GND 間有個超大電容,那你量起來也會是短路01/15 13:54
3F→:3.3V 和 3.3V 之間短路則是再正常也不過了...01/15 13:55
4F→:也許他們只用濾波器隔開, 也許根本沒隔, 量起來一樣是短路01/15 13:55
9F→:就算是同廠牌同型號也不見得是同一個 revision01/15 18:21
12F→:我如果真的無法判斷有無短路, 就只能用放大鏡稍微看看...01/16 01:07
13F→:沒有牽錫絲就當作沒短路, 不知大家是怎麼做 smoke test 的?01/16 01:07
1F→:鈕扣電池形狀的也有可充電鋰電池啊01/09 17:27
2F→:另外還有種東西叫超級電容 supercap, 電量用 F 當單位的01/09 17:28
3F→:說錯了, 電容值用 F 當單位的, 0.5F 或 1F 這樣...01/09 17:28
1F推:看你要做什麼用途, 我是都自己接線01/08 21:54
2F→:真的需要外掛 RAM 和 ROM 把整個 data bus 架起來的話01/08 21:54
4F→:我是去買一排八條的彩虹線來用...01/08 21:55
9F推:意思一樣啦, 不是 IC 的雜七雜八零件才是最常要自己畫的 :)01/05 22:58
8F推:買台 LEGO Mindstorm NXT 怎麼樣?01/02 18:10
2F推:你需要的可能是 RS-48512/30 01:20