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Dean Huster said:The 24 standard values for 5% resistors are 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82 and 91. That is, you'll find as a standard value 0.62, 6.2, 62, 620, 6.2K, 62K, 620K, 6.2M and 62M ohms, although the first and last won't be very common, especially the 62M.
Dean
heyhi said:theres 3 resistors im doing something wrong on or they are bad.all 3 are the same,br-bl-rd-gld...i have 10*100=1000 with a tolerance of 5%(50) these resistors are on 3 totally diff parts of the same board..2 of them are reading 799 wich im confused to wich way to lean..good or bad.. my reading should be from 950 to 1050..the third one really got me.its 01.2..
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when i test the ends is it ok to test the sodered part if my probe cant fit between the bottom of the res and the board
and is it normal for a res to go bad
Generally, the only ones that you'll use are 10, 12, 22, 27, 33, 47, 56, and 68.
With these, you can approximate values or use them in series and parallel.
Dean Huster said:I certainly don't agree with the approximating values or using them in series and parallel.
You're much better off stocking a few of all the 5% standard values rather than kludging together values from what you can find laying around. Series and parallel combos can push power and voltage ratings if you're not careful.
Dean Huster said:Nothing like having to have triple the number of resistors necessary for each project you build if you limit yourself to a very narrow range of value like that.
If I can't manage to do that, it means giving up the project or making a trip to the nearest good electronics store; conveniently located 2 cities away.
Usually too much power dissipated; in other words, too much heat, can cause the value to increasewhat causes a res to go bad
sometimes there is, but often there isn't - usually if the thing has gotten nearly to flame out it will be darker in overall coloris there visual evidince when it goes bad
A node is a node; the wire between components is CONSIDERED to have no resistance, and anything connected with wire is on the same node, so you should be ok here.when i test the ends is it ok to test the sodered part if my probe cant fit between the bottom of the res and the board
and is it normal for a res to go bad
I prefer this chart myself:Krumlink said: