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作者 beagle 在 PTT [ Electronics ] 看板的留言(推文), 共1245則
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2F→:場發射顯示器是不是還很少見的新產品?03/27 09:37
1F推:1 mm = 39 mil, 是不是換算錯啦?03/22 00:22
2F→:我不知道中小型是多大啦, 可是有網站的PCB廠都能做 4 mil03/22 00:35
3F→:六層以上就很吃力了, 打盲孔也相當貴呢...03/22 00:35
1F推:做一個來玩是 OK , 一定要求無法反推, bit 夠亂又不能太亂,03/15 13:29
2F→:那可以寫一系列的論文出來了...03/15 13:30
3F→:有安全考量, 還是儘量用現有的加密演算法去變型比較好...03/15 13:32
4F推:另外 hash 不保證一對一, 只是 collision 機會低...03/15 13:39
5F→:你要一對一, 去找 block cipher 或不對稱加密...03/15 13:40
1F推:有上限。輸入電壓多高?03/09 17:55
1F推:先檢查一下哪個元件工作溫度範圍不包含零度以下的...03/07 20:09
2F→:MCU 和 LCD 都有可能, 或者是其他 IC ...03/07 20:10
1F→:光華商場, 國際電子廣場, 西寧市場03/05 12:02
1F推:要先把設定設對, 然後 Auto -> Run Post Processor03/03 23:43
3F推:調整 Gerber Settings 和 Post Process Settings03/03 23:59
4F→:你碰到的是什麼問題? 照理說不管怎樣都會吐 Gerber 出來啊03/03 23:59
5F→:正不正確是另一回事, 應該要吐點什麼出來的...03/03 23:59
6F→:另外, Gerber 檔的附檔名不是 .gerber 而是 .TOP .BOT 等等03/04 00:00
10F推:對, 雙面板的銅層就只有這兩層, 試試看吧。03/04 00:11
11F→:另外電路雕刻機很不擅長把整塊銅板挖掉...03/04 00:12
12F→:所以儘量把空白處用銅倒滿, 這樣只要雕刻出線間空隙就好了03/04 00:13
2F→:有的應用不能接受供電中斷, 如8051的燒錄電壓 =.=02/27 16:45
1F→:如果是數位輸出, 用 74HC541 就能把輸出調整到 5V02/26 21:54
1F→:話說 Digi-key 有賣 Panasonic ML2020 ...02/26 17:32