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style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(51, 51, 51); --tt-darkmode-color: #A3A3A3;">1. 歐姆定律計算<br />計算電阻電路中電流、電壓、電阻和功率之間的關(guān)系。<br />歐姆定律解釋歐姆定律解釋了電壓、電流和電阻之間的關(guān)系，即通過(guò)導體兩點(diǎn)間的電流與這兩點(diǎn)間的電勢差成正比。<br />說(shuō)明兩點(diǎn)間的電壓差、流經(jīng)該兩點(diǎn)的電流和該電流路徑電阻之間關(guān)系的定律。該定律的數學(xué)表達式為 V = IR，其中 V 是電壓差，I 是以安培為單位的電流，R 是以歐姆為單位的電阻。若電壓已知，則電阻越大，電流越小。<br />2. 計算多個(gè)串聯(lián)或并聯(lián)連接的電阻的總阻值<br />3. 計算多個(gè)串聯(lián)或并聯(lián)連接的電容器的總容值<br />4. 電阻分壓計算<br />計算電阻分壓器電路的輸出電壓，以實(shí)現既定的阻值和電源電壓組合。<br />什么是分壓器?分壓器是一個(gè)無(wú)源線(xiàn)性電路，能產(chǎn)生一個(gè)是其輸入電壓 (V1) 一部分的輸出電壓 (Vout)。分壓器用于調整信號電平，實(shí)現有源器件和放大器偏置，以及用于測量電壓。歐姆定律解釋了電壓、電流和電阻之間的關(guān)系，即通過(guò)兩點(diǎn)間導體的電流與這兩點(diǎn)間的電勢差成正比。<br />這是一個(gè)說(shuō)明兩點(diǎn)間的電壓差、流經(jīng)該兩點(diǎn)的電流和該電流路徑電阻之間關(guān)系的定律。該定律的數學(xué)表達式為 V = IR，其中 V 是電壓差，I 是以安培為單位的電流，R 是以歐姆為單位的電阻。若電壓已知，則電阻越大，電流越小。<br />5. 電流分流器，電阻計算<br />計算連接到電流源的多至 10 個(gè)并聯(lián)電阻上流過(guò)的電流：<br />6. 電抗計算<br />計算指定頻率下電感器或電容器的電抗或導納大小。感抗/導納<br />容抗/導納</span></p><div id="o2jcxqk" class="pgc-img" style="box-sizing: border-box; margin: 18px 0px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="http://uphotos.eepw.com.cn/1663744867/pics/1665926281627684.png" title="1665926281627684.png" alt="image.png" /><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br /></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(51, 51, 51); --tt-darkmode-color: #A3A3A3;"><br />7. RC 時(shí)間常數計算器<br />計算電阻與電容的積，亦稱(chēng) RC 時(shí)間常數。該數值在描述電容通過(guò)電阻器進(jìn)行充電或放電的方程式中出現，表示在改變施加到電路的電壓后，電容器兩端的電壓達到其最終值約 63% 所需的時(shí)間。同時(shí)該計算器也會(huì )計算電容器充電到指定電壓所存儲的總能量。如何計算時(shí)間常數：<br />時(shí)間常數 (T) 可由電容 (C) 和負載電阻 (R) 的值確定。電容器 (E) 中存儲的能量 (E) 由兩個(gè)輸入確定，即由電壓 (V) 和電容決定。<br />8. LED 串聯(lián)電阻器計算器<br />計算在指定電流水平下通過(guò)電壓源驅動(dòng)一個(gè)或多個(gè)串聯(lián) LED 所需的電阻。注意：當為此目的選擇電阻器時(shí)，為避免電阻器溫度過(guò)高，請選擇額定功率是下方計算出的功率值的 2 至 10 倍之間的電阻器。<br />9. dBm 轉 W 換算<br />11. 電感換算<br />12. 電容器換算表<br />換算包括 pF、nF、μF、F 在內的不同量級電容單位之間的電容測量值。<br />13. 電池續航時(shí)間<br />電池續航時(shí)間計算公式<br />電池續航時(shí)間 = 電池容量 (mAh) / 負載電流 (mA)<br />根據電池的標稱(chēng)容量和負載所消耗的平均電流來(lái)估算電池續航時(shí)間。電池容量通常以安培小時(shí) (Ah) 或毫安小時(shí) (mAh) 為計量單位，盡管偶爾會(huì )使用瓦特小時(shí) (Wh)。<br />將瓦特小時(shí)除以電池的標稱(chēng)電壓 (V)，就可以轉換為安培小時(shí)，公式如下：Ah = Wh / V<br />安培小時(shí)(亦稱(chēng)安時(shí))，是一種電荷度量單位，等于一段時(shí)間內的電流。一安時(shí)等于一個(gè)小時(shí)的一安培連接電流。毫安小時(shí)或毫安時(shí)是一千分之一安培小時(shí)，因此 1000 mAh 電池等于 1 Ah 電池。上述結果只是估算值，實(shí)際結果會(huì )受電池狀態(tài)、使用年限、溫度、放電速度和其它因素的影響而發(fā)生變化。如果所用電池是全新的高質(zhì)量電池，在室溫下工作且工作時(shí)間在 1 小時(shí)到 1 年之間，則這種預估結果最貼近實(shí)際結果。<br />14. PCB 印制線(xiàn)寬度計算<br />使用 IPC-2221 標準提供的公式計算銅印刷電路板導體或承載給定電流所需“印制線(xiàn)”的寬度，同時(shí)保持印制線(xiàn)的溫升低于規定的極限值。此外，如果印制線(xiàn)長(cháng)度已知，還會(huì )計算總電阻、電壓降和印制線(xiàn)電阻引起的功率損耗。由此求得的結果是估算值，實(shí)際結果會(huì )隨應用條件而發(fā)生變化。我們還應注意，與電路板外表面上的印制線(xiàn)相比，電路板內層上的印制線(xiàn)所需的寬度要大得多，請使用適合您情況的結果。<br />如何計算印制線(xiàn)寬度：首先，計算面積：面積[mils^2] = (電流[Amps]/(k*(溫升[ ℃])^b))^(1/c)<br />然后，計算寬度：寬度 [mils] = 面積 [mils^2]/(厚度[oz]*1.378[mils/oz])用于 IPC-2221 內層時(shí)：k = 0.024、b = 0.44、c = 0.725用于 IPC-2221 外層時(shí)：k = 0.048、b = 0.44、c = 0.725其中 k、b 和 c 是由對 IPC-2221 曲線(xiàn)進(jìn)行曲線(xiàn)擬合得出的常數。<br />公值：厚度：1 oz環(huán)境溫度：25 C溫升：10 C</span></p><p><br /></p></span> <p style="color:#666; padding-top:30px;">*博客內容為網(wǎng)友個(gè)人發(fā)布，僅代表博主個(gè)人觀(guān)點(diǎn)，如有侵權請聯(lián)系工作人員刪除。</p>  <div class="cghyr33" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" 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