在电路设计时,经常要用到电阻,我们在确定电阻阻值时,一般先是根据电路进行计算,然后到电阻标准值里找一个最接近的。
电阻的标准阻值有以下:
精度为5%的碳膜电阻,以欧姆为单位的标称值:
10,11,12,13,15,16,18,20,22,24,27,30,33,36,39,43,47,51,56,62,68,75,82,91
精度为1%的金属膜电阻,以欧姆为单位的标称值(粗体为5%也有的阻值):
100,102,105,107,110,113,115,118,120,121,124,127,130,133,137,140,143,147,
150,154,158,160,162,165,169,174,178,180,182,187,191,196,
200,205,210,215,220,221,226,232,237,240,243,247,249,255,261,267,270,274,280,287,294,
300,301,309,316,324,330,332,340,348,357,360,365,374,383,390,392,
402,412,422,430,432,442,453,464,470,475,487,499,
510,511,523,536,549,560,562,576,590,
604,619,620,634,649,665,680,681,698,
715,732,750,755,768,787,
806,820,825,845,866,887,
909,910,931,953,976
以上这些阻值,可以按10的倍数进行放大。