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Old 6th June 2012, 07:51 PM   #1
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Default I hate it o.O

... just as always:

You've been ordering electronic stuff for months, drawing schematics, selecting parts and so on...

And when the iron is heated up, you'll notice that one resistor in the schematic you forgot to buy. Hmnpf.

Andreas
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Old 6th June 2012, 07:54 PM   #2
adason is offline adason  United States
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...that's no problem, you can always improvise, use two in series, or parallel to give you what you want
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Old 6th June 2012, 07:55 PM   #3
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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 .
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Old 6th June 2012, 07:56 PM   #4
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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....
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Old 6th June 2012, 08:21 PM   #5
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Quote:
Originally Posted by Preamp View Post
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.
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Old 6th June 2012, 08:23 PM   #6
mattmcl is offline mattmcl  United States
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If it's not a resistor it's the wrong power switch. I just had to order ONE SINGLE SWITCH, shipping was more than the switch itself.

It's a law of DIY electronics. No matter how well you think out the BOM and your order, you'll always forget something, or make a mistake.
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Old 6th June 2012, 09:37 PM   #7
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I very often draw schematic, then look in drawers which parts do I have, then recalculate and redraw.
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Old 7th June 2012, 12:17 AM   #8
49 - for the 18th time
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Quote:
Originally Posted by Wavebourn View Post
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....
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Old 7th June 2012, 12:47 AM   #9
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Quote:
Originally Posted by Wavebourn View Post
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
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Old 7th June 2012, 12:53 AM   #10
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It just sucks that there's no local distribuors anymore.
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