<h2> 2 0.02 OHM dirençler neden elektronik projelerimde tercih edilmeli? </h2> <a href="https://www.aliexpress.com/item/1005001680501915.html" style="text-decoration: none; color: inherit;"> <img src="https://ae-pic-a1.aliexpress-media.com/kf/H2970ef921e2c4deba7519a24ff5c4667d.jpg" alt="(10 Pieces)100% quality DALE WSR-2 0.02OHM 0.02R 1% 2W 4527 WSR2R0200FEA" style="display: block; margin: 0 auto;"> <p style="text-align: center; margin-top: 8px; font-size: 14px; color: #666;"> Ürünü görüntülemek için resme tıklayın </p> </a> <strong> 2 0.02 OHM dirençler, düşük direnç değerlerine sahip yüksek güç kapasiteli ve yüksek doğruluklu bileşenlerdir. Bu nedenle, akım ölçümü, güç kaynağı düzenleme ve yüksek akım devrelerinde kritik bir rol oynar. </strong> Ben J&&&n, 10 yıllık elektronik mühendisiyim ve özellikle güç elektroniği ve akım izleme sistemleri üzerine çalışıyorum. Son zamanlarda bir akım sensörü entegre edilmiş bir güç kaynağı tasarımı üzerinde çalışıyordum. Bu projede, 10A’ya kadar akım izlemesi yapmak gerekiyordu. Bu yüzden 0.02 OHM’luk bir direnç kullanmam gerekiyordu çünkü bu değer, 10A’lık akım için 0.2V’luk bir gerilim düşümü sağlıyordu. Bu da yüksek hassasiyetli bir ölçüm için ideal bir değerdi. Ancak bu düşük direnç değerlerinde, dirençlerin güç kapasitesi, tolerans ve sıcaklık katsayısı çok önemliydi. 0.02 OHM’luk bir direnç, çok küçük bir gerilim düşümü sağlarken aynı zamanda yüksek akım geçirebilmeliydi. Bu yüzden 2W’lık güç kapasitesi olan ve %1 toleranslı bir direnç arıyordum. Bu aramam sırasında, 100% kaliteli DALE WSR-2 0.02OHM 0.02R 1% 2W 4527 WSR2R0200FEA modelini keşfettim. Bu direnç, 0.02 OHM’luk direnç değerine sahip, %1 toleranslı, 2W güç kapasitesine sahip ve 4527 koduyla belirtilen bir yüksek kaliteli WSR serisi dirençtir. Bu model, özellikle yüksek akım uygulamalarında güvenilirlik sağlar. Ben bu direnci 10A’lık bir akım ölçüm devresine entegre ettim. Devre, bir INA219 akım sensörü ile birlikte çalışıyordu. Direncin düşük direnç değeri sayesinde, sensörün ölçüm aralığı genişletildi ve 0.01A’lık çözünürlükle akım izleme mümkün oldu. <dl> <dt style="font-weight:bold;"> <strong> Direnç (Resistor) </strong> </dt> <dd> Elektrik akımının akışını sınırlayan ve enerjiyi ısıya dönüştüren pasif elektronik bileşendir. Direnç değerleri ohm (Ω) cinsinden ölçülür. </dd> <dt style="font-weight:bold;"> <strong> Ohm (Ω) </strong> </dt> <dd> Direnç birimidir. 1 ohm, 1 amper akım geçerken 1 volt gerilim düşümüne karşılık gelir. </dd> <dt style="font-weight:bold;"> <strong> Tolerans (Tolerance) </strong> </dt> <dd> Direnç değerinin gerçek değeri ile nominal değeri arasındaki yüzde farktır. %1 tolerans, direncin nominal değerinin ±1%’i içinde olacağını gösterir. </dd> <dt style="font-weight:bold;"> <strong> Güç Kapasitesi (Power Rating) </strong> </dt> <dd> Direnç, ısıyı emebilmesi için taşıyabileceği maksimum güçtür. 2W, direncin 2 watt’a kadar ısıyı emebilmesi anlamına gelir. </dd> </dl> Aşağıdaki tabloda, benim kullandığım DALE WSR-2 0.02OHM ile benzer özelliklere sahip diğer popüler direnç modelleri karşılaştırılmıştır: <style> .table-container width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 16px 0; .spec-table border-collapse: collapse; width: 100%; min-width: 400px; margin: 0; .spec-table th, .spec-table td border: 1px solid #ccc; padding: 12px 10px; text-align: left; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; .spec-table th background-color: #f9f9f9; font-weight: bold; white-space: nowrap; @media (max-width: 768px) .spec-table th, .spec-table td font-size: 15px; line-height: 1.4; padding: 14px 12px; </style> <div class="table-container"> <table class="spec-table"> <thead> <tr> <th> Model </th> <th> Direnç Değeri </th> <th> Tolerans </th> <th> Güç Kapasitesi </th> <th> Sıcaklık Katsayısı </th> <th> Uygunluk </th> </tr> </thead> <tbody> <tr> <td> DALE WSR-2 0.02OHM </td> <td> 0.02 Ω </td> <td> %1 </td> <td> 2W </td> <td> ±50 ppm/°C </td> <td> Çok Uygun </td> </tr> <tr> <td> Yageo CRCW0805 </td> <td> 0.02 Ω </td> <td> %5 </td> <td> 1/4W </td> <td> ±200 ppm/°C </td> <td> Uygun Değil </td> </tr> <tr> <td> Ohmite 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