![]() So stacking parts isn't needed except if you are simply short some particularly low high or low value 10/100/1k/10k/100k/1M +/-50%will cover 90% of resistor cases.įor those applications you should just use the closest common value since you don't much care anyway (e.g. Ĭonsider that resistors values are laderred on a logarithmic scale with steps based on tolerance of the series, however many applications just need to be in the ballpark and even 5% is overkillįor example, e.g. ![]() For example it is easy to solder an smt resistor on top of another and saves a step vs desoldering if I want to quickly try a value smaller than what I chose. Generally speaking combining resistors is either irellevant or self defeating, but when prototyping one does what one needs to so of course it is done extensively. If you don't have a list already, find your E-series lists here. Don't let anyone stop you from getting a range of resistors. However, in that case it could be wiser to put a single E192 resistor in it instead.įor prototyping purposes, having the entire E48 or better available is quite useful. ![]() Sometimes, you do need a very specific value. The intent behind their statement was fine, but a bit too absolute. Not even talking about tolerances on those values (although the problem of tolerances does add-up if you start combining resistors, make sure you use those that are accurate enough if your application needs it), often enough simple is better than accurate. For that, you really want to get used to the E12/24/48/96 series.įor example, if you calculated you need 18800 Ohm, a 18k7 would usually be good enough. What they should have said, was that in practice you work with what you got and it often isn't necessary to use networks just to get a non-standard value.
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