Components To Keep On Hand

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

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emdot_ambient
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Post by emdot_ambient » Tue Nov 24, 2009 1:31 pm

cornutt wrote:I suggest that this thread become a sticky.
It would seem like a good one to sticky, as would a "Hard To Find Component Sources" thread or something like that...and a "Pots & Jacks" thread 'cause noobs like me are always going to be like, "Do I REALLY need to spring for Vishay/Spectrol jacks at $2.30 apiece."

Though I just realized I'm going to need more like 200+ of them and can get a price of around $1.36 apiece for them.

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wetterberg
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Post by wetterberg » Tue Nov 24, 2009 1:32 pm

cornutt wrote:I suggest that this thread become a sticky.
+1!
I sometimes think I'm ridiculous for actually having trouble dealing with ordering components at all - this thread is a great reminder of how hard it can be, but also what can be done to make it easier.

I still wish there was like a joint effort to make projects for all the modules out there. It would be in everyones best interest, and I'd start the work at RapidOnline myself if they weren't so annoying to buy from :-(

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emdot_ambient
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Post by emdot_ambient » Sat Dec 05, 2009 9:31 pm

So I've started collecting all the crap I need for DIY...and it's all the common hardware and things that's got me this time.

PCB standoffs (type/size/thread, etc.)
Wire for connecting panel HW (type, gauge, etc.)

What else am I going to need...what do you usually use, where do you get it, etc.

Same old story, look for it on mouser or wherever and you get 8 billion choices.

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Luka
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Post by Luka » Sat Dec 05, 2009 11:42 pm

stickied :)


i am usually stocked up in various things like

opamps (tl072s tl074s)
transistors (standard npn pnps)
resistors of all kinds (bulk in 1k, 1m, 10k, 100k, 1m, 47k, 22k)
100n multi-layer ceramics
10n electro caps
1n1418 diodes
0.100 connectors and headers of various pin sizes
stand offs
heat shrink tube
wire of various colours
pcbs (wish i could find a way to stop stocking these :) )
pots
knobs

these days i have stock of lots of weird stuff too like tubes, exotic IC, random tools that were bought for 1 use, old school lamps, old school meters, vactrols

i want to find a place for bulk standoffs, ive been buying mine at jaycar and it costs a fortune. i guess i could probably get them from a nut and bolt kinda place hey

i use futurelec for all connectors and headers and IC. recently ive worked out that their resistors are not so good. i have had to match lots of resistors for projects and it is hard to find matches with their stock even when they are on the same roll. jaycar resistors have been the best so far for that

allied electronics for knobs and pretty stuff

rockby (local shop) for all other bits

if you are new to all of this i would recommend shops like small bear. they have a pretty good selection of all the bits you need

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consumed
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Post by consumed » Sun Dec 06, 2009 12:24 am

emdot_ambient wrote:Wire for connecting panel HW (type, gauge, etc.)
i use this stuff for EVERYTHING (except power) because it makes life easy.

http://www.smallbearelec.com/Detail.bok?no=85

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consumed
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Post by consumed » Sun Dec 06, 2009 12:32 am

emdot_ambient wrote:PCB standoffs (type/size/thread, etc.)
i think mcmaster-carr is the best place to shop for this kind of hardware
i went with 4-40 screws, hex standoffs and washers
here's an order i placed at the beginning of the year
i find that i dont have much use for the really long standoffs though.
http://www.mcmaster.com

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the bad producer
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Post by the bad producer » Sun Dec 06, 2009 8:34 am

I tend to use threaded standoffs as they look better etc etc,

but when I run out I use M3 bolts and bits of cut down biro as spacers... gotta find a use for all those old biros... can look quite neat too!

charlie

(waste not want not - as they used to say!)

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emdot_ambient
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Post by emdot_ambient » Sun Dec 06, 2009 12:08 pm

the bad producer wrote:...when I run out I use M3 bolts and bits of cut down biro as spacers...
:lol: You're a nutter! But I like your style!

Thanks, everyone. Great info.

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decaying.sine
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Post by decaying.sine » Tue Feb 23, 2010 10:00 pm

I am getting ready to buy resistors for some projects and plan to get a couple hundred of various values. I am wondering what folks recommend for power and voltage rating? There is a reference above to 1/4 watt power rating. Is that fine for all synth DIY applications? How about the voltage?
Brian
"I must create a system or be enslaved by another mans; I will not reason and compare: my business is to create." William Blake

"Vactrols ringing, Dude." "Thank you Donny"

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neandrewthal
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Post by neandrewthal » Tue Feb 23, 2010 11:12 pm

decaying.sine wrote:I am getting ready to buy resistors for some projects and plan to get a couple hundred of various values. I am wondering what folks recommend for power and voltage rating? There is a reference above to 1/4 watt power rating. Is that fine for all synth DIY applications? How about the voltage?
You`ll want to stick to quarter watt if you want them to be small enough to fit most PCBs. I`ve never even heard of voltage ratings for resistors. Any quarter watt should be fine.

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Luka
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Post by Luka » Wed Feb 24, 2010 12:28 am

fine

i would recommend get a couple hundred of
1k, 2k2, 4k7, 10k, 22k, 47k, ... 470k etc up to 2m2
(500+ in some cases like 10k, 100k)
then small packs of what you need around these amounts

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decaying.sine
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Post by decaying.sine » Wed Feb 24, 2010 12:28 am

perfect. thank you. the mouser filter gives you a lot of options so this helps narrow my focus.
Brian
"I must create a system or be enslaved by another mans; I will not reason and compare: my business is to create." William Blake

"Vactrols ringing, Dude." "Thank you Donny"

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Peake
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Post by Peake » Mon Mar 08, 2010 4:17 pm

[quote="DGTom"]Caps. are much the same as resistors; you'll always need 100nF monolythics, 10uF Electros etc.quote]

Yep, I see them on many of the DIY boards that are around these days. I have a bag of 10uF for just such an emergency.
This is not the place I'd imagined it to be.

StkMtd
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Post by StkMtd » Fri Mar 12, 2010 4:41 pm

xyz
Last edited by StkMtd on Sat Jan 16, 2016 4:57 am, edited 1 time in total.

StkMtd
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Post by StkMtd » Fri Mar 12, 2010 4:48 pm

decaying.sine wrote:I am getting ready to buy resistors for some projects and plan to get a couple hundred of various values. I am wondering what folks recommend for power and voltage rating? There is a reference above to 1/4 watt power rating. Is that fine for all synth DIY applications? How about the voltage?
Resistors burn up if you pass too much power through them. They're not rated in voltage.

As an example you could have a 10k 1/4W resistor pass 500V

P = V * I
0.25 W = 500 V * I
I = 0.25 W / 500 V
I = 500 uA

but it would only take a maximum of 500 uA (which is almost nothing), and it would be very foolish. However, you can see that the limit is based on 2 factors, and not one.

This is unlike capacitors which won't pass a current, and can only be rated in terms of the maximum voltage across the plates. (before they ostensibly explode)

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decaying.sine
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Post by decaying.sine » Fri Mar 12, 2010 4:56 pm

StkMtd wrote:
decaying.sine wrote:I am getting ready to buy resistors for some projects and plan to get a couple hundred of various values. I am wondering what folks recommend for power and voltage rating? There is a reference above to 1/4 watt power rating. Is that fine for all synth DIY applications? How about the voltage?
Resistors burn up if you pass too much power through them. They're not rated in voltage.

As an example you could have a 10k 1/4W resistor pass 500V

P = V * I
0.25 W = 500 V * I
I = 0.25 W / 500 V
I = 500 uA

but it would only take a maximum of 500 uA (which is almost nothing), and it would be very foolish. However, you can see that the limit is based on 2 factors, and not one.

This is unlike capacitors which won't pass a current, and can only be rated in terms of the maximum voltage across the plates. (before they ostensibly explode)
Thanks for the information. I've been reading through the all about electronics site, and I appreciate any info I can get.
Brian
"I must create a system or be enslaved by another mans; I will not reason and compare: my business is to create." William Blake

"Vactrols ringing, Dude." "Thank you Donny"

StkMtd
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Post by StkMtd » Fri Mar 12, 2010 5:01 pm

decaying.sine wrote:
StkMtd wrote:
decaying.sine wrote:I am getting ready to buy resistors for some projects and plan to get a couple hundred of various values. I am wondering what folks recommend for power and voltage rating? There is a reference above to 1/4 watt power rating. Is that fine for all synth DIY applications? How about the voltage?
Resistors burn up if you pass too much power through them. They're not rated in voltage.

As an example you could have a 10k 1/4W resistor pass 500V

P = V * I
0.25 W = 500 V * I
I = 0.25 W / 500 V
I = 500 uA

but it would only take a maximum of 500 uA (which is almost nothing), and it would be very foolish. However, you can see that the limit is based on 2 factors, and not one.

This is unlike capacitors which won't pass a current, and can only be rated in terms of the maximum voltage across the plates. (before they ostensibly explode)
Thanks for the information. I've been reading through the all about electronics site, and I appreciate any info I can get.
Best way to get a grip on it is to put it into practice. As general advice though, I've seldom found applications that require more than 1/4W. I only have 1/2W resistors because they're sometimes cheaper than 1/4W (which is the case for the large pile of 2M2 I have at the moment). Some people say it's hard to fit 1/2W onto a board, but I wonder if they've ever heard of Axial Mounting. I understand vertical space can be a concern, but I think it's fine in most applications.

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Post by consumed » Sun May 16, 2010 7:54 pm

Peake wrote:
DGTom wrote:Caps. are much the same as resistors; you'll always need 100nF monolythics, 10uF Electros etc.
Yep, I see them on many of the DIY boards that are around these days. I have a bag of 10uF for just such an emergency.
i now have a small stash of 22uF electrolytics and 100nF multilayered ceramics since they are mostly present on every single board ive been building.

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Neutron7
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Post by Neutron7 » Sat Aug 28, 2010 1:20 am

Sometimes at digikey (and maybe mouser, never checked) there are resistors like 22.1 k 1% Instead of 22k
its close enough and those off values are usually very cheap, and good quality, so just be careful how you search.

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