Electronics supplies

[Yimmy]

I found myself in search of a "grab bag" type of sorts. I really just want to get a good assortment of resistors, caps, etc. But I found these hard to come by in the "hobby" realm. What would you guys suggest I do, or how do you stock up on resistors and caps, transistors, diodes, etc :confused:

[Soarmax]

Your local Radio Shack will have some Bulk assortments of resistors, capicators, hardward, etc.

http://www.radioshack.com/family/index.jsp?categoryId=2032267&cp=2032058.2032230

Other places you can check are:

http://www.allelectronics.com/

http://www.goldmine-elec.com/default.htm

http://www.glitchbuster.com/#Comp&Prod

[JohnMuchow]

Check Mouser and Jameco too.

http://www.mouser.com
http://www.jameco.com

[Probedude]

Check Ebay also. There's a few guys that are kitting assortments of caps, resistors, and IC's and selling them at reasonable prices.

[vintage1]

Hit the local rubbish tip, and pull out a few chassis and old radios and strip them.

[bravokilo]

Yimmy:

Am sure you have a junkyard or if you drive around Sat and Sunday morning, people are putting out old TVs, VCRs,etc. The VCRs have loads of diodes, inductors, class a capacitors (green stuff)-they are mylars and the orange ones are tantalums. Don't disregard telphone sets especially wireless ones or fax machines. A set of wireless phone can be converted if size is not an issue such TX and Rx| for a boat to run around a lake in a farm. Just stay away from the FCC. You can buy a pair of 6m RC xtal and switch to legal channel but if we follow the book, we need a license to fiddle with the TX.ah, the last part may not really be your interest but it might guide you what to scrounge for. Those "bag of something" sometimes contains too much of stuff you don't need.

BravoKilo

[AndyOne]

I learned to stay clear of those assortment bags of components after finding all kinds of components you could only use in a valve (tube) circuit or in a high energy physics lab. What use is a 10 Watt 4.7M Ohm resistor these days.

Andy.

[Andrew0820]

What use is a 10 Watt 4.7M Ohm resistor these days.

Andy.

Works as a nice pre-load if you're converting a PC powersupply for benchtop use or as a charger power source. :)

[AndyOne]

To justify the power rating you need more than 6,000V across it, see what I mean.

Andy.

[Andrew0820]

What use is a 10 Watt 4.7M Ohm resistor these days.

..............To justify the power rating you need more than 6,000V across it, see what I mean.

Whoops!!? -- didn't notice the 4.7M the first time. :confused: That does make a difference.

[ghoti]

components you could only use in a high energy physics lsb\\ab. What use is a 10 Watt 4.7M Ohm resistor these days.

Andy.


If I figured Ohm's law right it would take about 22,000 volts placed across a 4.7 meg resistor to pour 10 watts into it. Some physics lab! Bill

[westfw]

eBay is a particularly good source of this sort of thing, especially in SMT, since "partial reels" seem to be almost a liability once the production line that used them has gone away or something. Keep in mind that for most DIGITAL electronics, you rarely need
exact values. I picked up a set of "precision" smt resistors a while back, having values
like 97.2k (about 100k), 1.24M (about 1M), etc.

I can recomend http://stores.ebay.com/NightFire-Electronic-Kits, who has "normal" assortments as well as "useful semiconductors plus a handful of passive parts" sets, in a variety of SMT and TH sizes.

[AndyOne]

If I figured Ohm's law right it would take about 22,000 volts placed across a 4.7 meg resistor to pour 10 watts into it. Some physics lab! Bill


Just for completeness...

From Ohm's law P=V^2/R
so SqrtPR =V

p=10 and R=4.7x10^6
so PR=4.7x10^7

and Sqtr 4.7x10^7 = 6855.65V

Andy.