Yeah this is standard. You can make the same mistake like I did by building up a stock. Thousands of parts and still things missing the right ones for your project...
Or just make a parts list/BOM and then buy exactly what you need. IMO the wisest choice. However having all the resistors or the whole series won't cost much and it will make you a happy person in the resistor area
Just look at the frequency of replies, I think you touched a nerve here....
Or just make a parts list/BOM and then buy exactly what you need. IMO the wisest choice. However having all the resistors or the whole series won't cost much and it will make you a happy person in the resistor area
Just look at the frequency of replies, I think you touched a nerve here....
Andreas,
I always buy at least 10 resistors of a given type, even if I only need 2. So there's a little chance that I might have something suitable at home in such cases
Hi Lasse,
yes, that's the same I do. But 68R 1W 1% metal film was not needed before, so there's none in the drawer
Greetings,
Andreas
PS. And of course tomorrow's an official holiday, so I have to wait until Friday. Hmnpf.
I very often draw schematic, then look in drawers which parts do I have, then recalculate and redraw.
Doesn't matter usually. Even if I have all of the parts I'm bound to smoke one up - or drop it into some sort of time warp located just under my work bench - never to be seen again. Whatever - shxx happens and I'm gonna be making another order somewhere along the line. It's a bit like going to the hardware store - you know that the 1st trip isn't gonna be the only trip....
I very often draw schematic, then look in drawers which parts do I have, then recalculate and redraw.
At least I'm not the only one who doesn't know what he's got without looking. Again and again seemingly ad infinitum in my case.
When I worked with valves, I bought just what I needed and knew what I had. With solid state and all its paraphanalia, I've completely lost the plot, inventory-wise. I spend a lot of time lost in a recursive loop, looking for stuff I may not have.
Stock control is a dismal occupation and spoils the fun, so I feel I'm between a rock and a hard place.
I wonder how many commercial products incorporate a bodge simply because the designer couldn't admit he'd forgot to order the right part, or lost it, when the prototype was made. Same with datasheet application guides.
Ian
Doesn't matter usually. Even if I have all of the parts I'm bound to smoke one up - or drop it into some sort of time warp located just under my work bench - never to be seen again. Whatever - shxx happens and I'm gonna be making another order somewhere along the line. It's a bit like going to the hardware store - you know that the 1st trip isn't gonna be the only trip....
I do that as well.
Sometimes it is easier to go and buy some bolts, nuts, screws, etc..., than search for them in my barn.
Try ordering a set of 8 custom PC boards and finding a mistake in the layout. Someone helped me figure out a solution, but it's not great. So, that's $130+ sort of wasted.
Doesn't matter usually. Even if I have all of the parts I'm bound to smoke one up - or drop it into some sort of time warp located just under my work bench - never to be seen again. Whatever - shxx happens and I'm gonna be making another order somewhere along the line. It's a bit like going to the hardware store - you know that the 1st trip isn't gonna be the only trip....
We may share a rift in the continuum. Parts appear here sometimes that I know absolutely nothing about.
I get tailed by security in hardware shops. Too much searching in too many disparate places, wondering if I can make this out of that.
Spot on...
I remember when you had a choice of shops that sold electronic parts...Even the TV repair shops are gone...The old philips kits X40 comes to mind and the fun of the tropical fish capacitors... Remember the BF194 type transistors package.
You could even get copies of drawings from the local tele shop now its internet only...perhaps the choice of components is greater but the convienience is getting lower..even Maplin is becoming a black box retailer. Quote," do you have that resistor in 2Watt"..answer.. don't know can you read the colours?..have you got four 1K resistors sorry we only carry 2 but there is only one in stock...
Regards
M. Gregg
Well in the UK we do have RS components. Sure this isn't a store you can actually visit, but they do offer free next day delivery on any order size, providing you place the order before 5-6pm. This isn't the same as realising you're missing one 50R resistor and being able to go out and buy it, but it is about as good as it gets.
As preamp says getting a stockpile always helps. I always buy resistors (SMD ones) in packs of 50 and have loads of values now left over so I can usually sort something out.
As preamp says getting a stockpile always helps. I always buy resistors (SMD ones) in packs of 50 and have loads of values now left over so I can usually sort something out.
Uhhh.
Done this recently, 1 day after sending in the gerbers, I found the mistake. It is fourtunate that I could fix it by cutting a trace and jumping wire. Making PCBs by hand is impossible for me when dealing with super tiny SMDs, like SOT562 or SOT923.
I like Farnell and Rapid...
Ebay can be good..selective use..Still the shops are missing ....no call for it I'm told...Regards
M. Gregg
My "junk box" is well filled and I try to design with what I've got. Laugh if you want, but depending on where it went, if I needed a 68 ohm 1W 1% or better resistor, I'd grab the spool of manganin wire and wind one. Non-inductively bight wound, of course. If the size or appearance offended me, I'd just live with it until I could add it to some larger order so as not to take a bath on shipping charges.
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