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全部Electronics852comm_and_RF790Emulator107kartrider52AquaPet39InlineSkate31StupidClown27Hunter22joke22Gossiping18Facebook17SYSOP16Master_D14P2PSoftWare14Hate12L_SecretGard11Little-Games11NCKU-BEH9510specialman10PttHistory9dance8HOT_Game8NTU-EM938ask-why7CMU_Guitar427Hsinchu7KHCHS-93-3057media-chaos6sex6KS94-3205NCHU-FS1005skating5CGU_EE984cksh77th224KS95-3184KS97-3084MATLAB4NCCU04_TUR4NCTU_Lab9044NDMC-D624NSYSU_MSOE994NTPU-STAT954Plant4TA_AN4TuTsau4AllTogether3ask3CJCU3Daan26th3163FCU_EE97A3FixMyHouse3Fooyin3HSNU_10853Japanese-B903KS94-3113NDHU-phy953NTHU_STAT943NTPU-STAT973NTUEE_LAB5063PhD3PttLifeLaw3PushDoll3RFonline3share3talk3TFSHS66th3193THU_BA20003THUIM-5th3TKU_EW94B3TTU-AMath3VISA3Anti-ramp2ck56th3212ck59th3122cksh83rd3102cksh84th3212CSMU-MED952CTCNEC782Finn2FJU-ACCR942FLAT_CLUB2Gintama2HatePolitics2HSNU_10272HSNU_10652HSNU_10982HSNU_9752HTSH-7th3132hurry-up2I_LOVE_MRI2Interior2KS93-3202KS94-3022KS94-3072KS96-3052KUAS_IEM942MuscleBeach2Navy2NCCU07_JAPAN2NCCU99_BANK2NCUCEM2NH11th3053092NIUECE912NTHU_COM6072NTNU_Lin_962NTPU-CRIM942NTPU-CSIE932NTUE-CS982NTUE_Nse962NTUEE_BL5272NUK_EE100A2NUU-EO-97A2Old-Games2Ordnance54-22R953230XX2TFSHS66th3072TigerBlue2TNFSH94022TransCSI2TribalWars2VET_962Violation2AACK1ArtCenter1ASIA-uni1ASIA_ISA1Azumanga1BBSmovie1CCSH_91_3201CCSH_92_3161CCU-3DVG1CCUfinGrad931CCUfinGrad951Chan_Mou1Chemistry1Chen_C_H1ck50th3231ck53rd1221ck53rd3171ck55th3111ck55th3141ck55th3181ck55th3201ck56th3051ck56th3061ck56th3221ck58th3021ck58th3071ck59th3011cksh79th011cksh85th3171cksh85th3201CPU_CID7311CSMU-D-TTT1CSMU-MED941CSMU-OSH1CSMU-PT971CSMU-V-CLUB1CTSH923061CTSH963011CYSH97Y3181Digitalhome1Doujinshi1DragonBall1DSLR1Ecophilia1EE_Service1esahc1FacebookBM1FCU-STAT-941FJU-Laws941FJU-Stat95A1FJU_JCS81FJU_N96b1FSHS-90-3131GaaaN1GIEE_941GIEE_951Golden-Award1Google1Haruhi1HFU_me_89B1HGSH963031HLHS_10thU1Horror1HSNU_10081HSNU_10321HSNU_10661HSNU_11351HSNU_9471INSECT-931Instant_Mess1jawawa1JOJO1KingdomHuang1KMU_CIA1Korea1KOU1KS91-3061KS94-3151KS95-3021KS95-3091KS95-3101KS96-3141KS97-2161KS97-3101KUAS_ME94A1L_BoyMeetsGi1Liu1Metal_kids1NCCU_PubLaw1NCHU-AGR021NCHU-AGR041NCHU-AS1021NCHU-FS991NCU95Stat1NCYU_ANS_981NCYU_Fst_991NDHU-His1001NEMS1NightLife1Nintendo1NIUEE93a1NLHS-3th-3061NTCU-SPE92A1NTU-EM921NTU-Graduate1NTU-K91NTUCivilism1NtuDormF51NTUDrama951NTUE-DC991NTUEE_Lab4261NTUEE_Speech1NtuHisBasket1NTUmed911NTUSA1NTUST-DT93-21NTUST-EE-B971NTUST_Mt1NTUT_CH585A1NYUST98_FING1Orange_Dream1PCSH91_3051PeopleSeries1PSY_Baseball1PT-Consult1Reptile1Rock_OE1RSJH88-3271Rubiks1SCU-BM-93B1Sorry_Youth1SSSH-11th3141Stephen1Supermission1tajen1tax1Tea1tennis_life1TFSHS62th3051TFSHS64th3091TFSHS65th3061THU-P-Softbo1THUIM-2nd1THULAW1TKU-ee-91a1TKU_CE94C1TNFSH94011TSH93_11TTU-talk1tyart1TYSH48-3011Violin1WuBai_and_CB1WuLing46-3171YeeLing1YZU_EE95B1YZUfinGrad951<< 收起看板(279)

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[問題] 聲控ic

[ Electronics ]18 留言, 推噓總分: +6

作者: willie7820 - 發表於 2009/12/08 23:38(14年前)

7^F推youwin0125:就M300 把微小的聲波(空氣疏密波)轉成微小的電壓波12/09 09:48

8^F→youwin0125:連續3級的Q1 Q2 Q3 把信號放大 ,再控制Q4開關LED的電流12/09 09:52

9^F→youwin0125:Q1 Q2 Q3 只是基本的CE組態放大器12/09 09:52

10^F推youwin0125:那些R 都是偏壓電阻讓BJT選擇工作區12/09 09:58

11^F→youwin0125:R9 是限制LED的電流12/09 09:58

12^F→youwin0125:C4是電源穩壓12/09 09:58

13^F→youwin0125:C1 C2 C3 是DC block12/09 09:59

[無言] 強者我同學

[ StupidClown ]56 留言, 推噓總分: +41

作者: athea - 發表於 2009/12/04 11:01(14年前)

36^F推youwin0125:千萬不要正負插顛倒了不然.......12/04 15:32

[問題] 太陽能板挖洞還能用嗎?

[ Electronics ]8 留言, 推噓總分: +2

作者: twforever - 發表於 2009/12/02 17:21(14年前)

1^F推youwin0125:http://ppt.cc/t~GI12/02 17:59

2^F→youwin0125:http://blog.udn.com/chenae6505/184385512/02 18:00

3^F推youwin0125:各種形狀太陽能板 http://ppt.cc/0gHN12/02 18:02

4^F→youwin0125:http://tds.ic.polyu.edu.hk/mtu/hict/eh/t3/p1.htm12/02 18:02

5^F→youwin0125:指要你不讓內部線路 short 買完整的一塊挖洞也行12/02 18:02

6^F→youwin0125:他是很多個cell 串並聯用的不會讓電路short 改變電壓12/02 18:03

7^F→youwin0125:就可以挖洞12/02 18:03

[問題] 無限鍵鼠和3.5G網卡

[ comm_and_RF ]7 留言, 推噓總分: +1

作者: VortexSheet - 發表於 2009/12/02 07:48(14年前)

1^F推youwin0125:不是頻率問題是mouse的無線 RX220.228.151.221 12/02 14:31

2^F→youwin0125:被3.5G 訊號打到非線性無法接收220.228.151.221 12/02 14:32

3^F→youwin0125:如果滑鼠RX沒有放 GSM reject filter220.228.151.221 12/02 14:32

4^F→youwin0125:LNA 接收功率太強會超過P1dB點220.228.151.221 12/02 14:33

5^F→youwin0125:不管其他什麼頻率的信號都接收失真220.228.151.221 12/02 14:33

6^F→youwin0125:3.5G網卡就在旁邊功率一定超強220.228.151.221 12/02 14:33

[問題] Level shift circuit

[ Electronics ]8 留言, 推噓總分: +4

作者: ccd7245 - 發表於 2009/12/01 21:26(14年前)

3^F推youwin0125:CS 會反向不過可以反兩次負負得正 XD12/02 15:27

4^F→youwin0125:阿是BJT 那就是CE12/02 15:27

5^F推youwin0125:http://ppt.cc/5ixQ12/02 16:42

6^F→youwin0125:http://ppt.cc/lcJo12/02 16:42

7^F→youwin0125:http://ppt.cc/~L_312/02 16:43

8^F→youwin0125:http://www.edaboard.com/ftopic258853.html12/02 16:43

[問題] 關於這些ic在電路板中的功能

[ Electronics ]15 留言, 推噓總分: +8

作者: gn00158131 - 發表於 2009/11/28 23:55(14年前)

2^F推youwin0125:http://ppt.cc/KNpW PIC16F887 datasheet11/29 02:06

3^F推youwin0125:http://ppt.cc/(Bkg HT45BOC 高壓MOSFET 的driver11/29 02:10

4^F推youwin0125:http://ppt.cc/ALWt SP232 跟電腦介面RS232 通訊用11/29 02:13

5^F推youwin0125:http://ppt.cc/n2zR PC817 光耦合器電信號變光再變電11/29 02:16

7^F推youwin0125:完了小弟不知道樓上的梗 XD 沒讀過金庸小說 XD11/29 18:26

Re: [請益] 發射模組

[ comm_and_RF ]6 留言, 推噓總分: +2

作者: pursuer - 發表於 2009/11/28 16:39(14年前)

1^F推youwin0125:模組輸出再接放大器呢??114.44.126.21 11/28 18:36

2^F→youwin0125:http://ppt.cc/sE!I114.44.126.21 11/28 18:37

[請益] 發射模組

[ comm_and_RF ]3 留言, 推噓總分: +1

作者: pursuer - 發表於 2009/11/27 22:36(14年前)

1^F推youwin0125:應該沒有這麼寬頻的發射模組114.44.143.93 11/28 01:21

2^F→youwin0125:針對某個規範的應用會比較好找114.44.143.93 11/28 01:21

3^F→youwin0125:900 1800 是GSM, 2.4G是WIFI bluetooth114.44.143.93 11/28 01:22

[請益] 如何DIY紅外線遙控開關?

[ Electronics ]17 留言, 推噓總分: +3

作者: MarsInducer - 發表於 2009/11/27 15:03(14年前)

1^F→youwin0125:紅外線顧名思義就是波長在紅光之外所以人眼看不到y11/27 15:21

2^F→youwin0125:怎麼會用白光LED ^^11/27 15:22

3^F→youwin0125:阿我好像會錯意了 XD 白光LED是被啟動的電路不是發射11/27 15:22

4^F推youwin0125:紅外線接收完應該還要一個buffer 因為訊號太弱11/27 15:29

6^F推youwin0125:http://penguin5.myweb.hinet.net/8051/RX_TX.htm11/27 16:16

7^F→youwin0125:請參考他人的紅外線電路11/27 16:16

8^F→youwin0125:你的控制訊號開關電晶體對 TX LED11/27 16:17

9^F→youwin0125:RX LED 收到後也需要電晶體放大訊號去開關白光LED11/27 16:17

10^F→youwin0125:難處就在電晶體跟LED的電阻要控制電流跟偏壓11/27 16:18

Re: [請益] 關於電路模擬如何正確調整電晶體的尺寸 …

[ Electronics ]6 留言, 推噓總分: +4

作者: jfsu - 發表於 2009/11/27 15:02(14年前)

1^F推youwin0125:J大發文必屬佳文我推11/27 15:19

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