As already written in the title, I am interested in whether you measure your components value before you use them, or do you just take them as they come?
I didn’t measure them at the beginning because I just didn’t know that some of them come very differently from the producer.
So how do you do it?
No, but I try to make sure I’m ordering the dimensions I think I am.
1/4W metal film resistors from Tayda are all the same size, so no problem there. There are smaller ones on the market but I mostly stick with Tayda. Of course DIP ICs, TO-92 transistors, etc. are standardized. Diodes vary between types but generally not within types. The ones to watch out for mainly are capacitors. I have some honkin’ big ceramic capacitors that were a surprise when they arrived and I have no idea what I’ll use them for if I ever do.
Oh, I got it wrong, I don’t mean the size of the components, but the values, sorry
Short answer: No, I never do that, and my components are from various producers and in various qualities.
~Longer answer:
If you talk about passives, nowaday every resistor has quite good precision, and either way, your schematic must take that into account (or clearly specify that you need high precision resistor). For the capacitors, you clearly shouldn’t rely on the value, as it can vary significantly with temperature, age, or even DC voltage!
If you talk about ICs, you don’t need to, all the chances that they are in specs (if new).
If you want to salvage components from old circuits, then yes, measure and test them.
Ah…
I mostly haven’t found incorrect values to be a problem. Especially I haven’t found incorrect labeling of the part to be a problem. I do usually check the resistors with a multimeter, because I have too hard a time distinguishing the band colors (not colorblind, but the bands on 1/4W resistors are very small and the blue color throws off my color sense) and I did once find Tayda had sent me 2.2k instead of 22k or something like that, the label on the bag was what I’d ordered but not what was in it.
Nah, I don’t have time for that.
i general now put my passive components on my LCR-T4 tester, partly so I know that what was written on the packet was correct and being colourblind I cant tell a resistor easily.
I just look at my baggies. I have a nested baggie sorting system.
These trading card pockets for file folders are a good way to organize your components and to find them again quickly. Here is an example (please don’t pay attention to the price, it’s just an example)
usually NO I have everything sorted in bins according to their values and am way to impatient for checking everything . but having said that there are instances where the closer they match their values the better v/oct tracking you get and I have checked for that reason . and there was a time when I got a bad batch of transistors that weren’t what they were supposed to be , though I did find that out after I had put them in . this little thing is very handy for checking all sorts of things its what I use.there are different brands / prices out there
https://www.amazon.com/gp/product/B01MS1FOYM/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1
I tend to test no-name LEDs; they usually work, but the polarity isn’t always right (iirc, 2 of 48 in this build were backwards) and it doesn’t hurt to check that forward voltage and intensity is roughly the same if you use more than one…
Otherwise I only check resistors, and only when I’ve been interrupted while populating a board and find a single resistor on the workbench and don’t recall what value I was about to add… 
I have a nested baggie sorting system.
“How do you organize your components?” sounds like a good topic for a future post.
Thats a good idea ! It would be interesting
got lucky and picked these up a few years ago from a guy that was retiring from the organ repair business. .
Having been a huge card collector i cant do this because it gives me agida. I wouldnt even stack too many playsets into a sleeve. I cant even think about stuffing components in those shudder.
That’s great! I have a couple of smaller sorting boxes and the rest in a somewhat messy bag and yogurt tub system :). I’ve only been there for 3 months now, it is just starting to get a bit confusing. So I have to come up with something else …
It’s not bad at all for resistors and diodes!
this is a couple years of collecting components and working out a " system " .
I do the same for my projects, I pack “kits” together. With circuit diagrams, stipboard layouts and everything that goes with them. I have my larger parts, such as pots and sockets, in small buckets where there was previously potato salad 
I went to build an FC Power and I couldn’t find enough 1n4004s so substituted 1n4002s for some, then could only find two 4700 µF caps when I could have sworn I bought eight, and then I found the forgotten-about plastic bin into which I’d put all the parts for the build including the PCB (I’d bought two and was at that point nearly done building the other one). Borderline litany.
LOL yeah thats what would happen to me , even worse if I didn’t organize. I still tend to double order parts sometimes because I miss the drawer that I have them in. capacitors are really bad for that , so many different types.
