[sdiy] ebay resistors recommendations for values and quantity

[Dave Kendall]

Hi James.

You can never have too many 100K resistors  ;-)
When I planned bulk buys for mostly CGS and EFM stuff, I found that I 
needed 10-20 times more 100K than any other value, about 5-10 times 
more 10K, and a similar number of 1K.
Other common values were 47k, 4K7, 220R, 220K.
15K crops up often in CGS designs. The resistor dividers in the output 
buffers in CGS circuits vary a bit from circuit to circuit- I'd try 
different ones, or work out what gate output level you want, then buy 
lots of those pairs (eg 680R/820R, or 1K/2K2 etc.)

FWIW, some other very common components were;

1N4148 or 1N914 signal diodes
100K Linear pots
100n decoupling capacitors
10uF 25 - 35V electrolytic caps.
TL072/074 op amps
DPDT toggle switches.(nearly as cheap as SPDT, but more versatile)

Perhaps worth ordering some of the above at the same time to save on 
shipping, if you don't have lots already....?

cheers,
Dave




On Feb 16, 2008, at 21:28, James R. Coplin wrote:

> I am tired of buying resistors for my projects per project as I always 
> seem
> to have piles of odd resistors but not necessarily the correct ones.  
> There
> are some good deals (even with shipping) from Chinese suppliers 
> offering 1%
> lots.
>
> It ends up beings $19 after shipping for 2500 resistors of the 
> following
> values (50 resistors each value):
>
> 2.7 ohm
> 5.6ohm
> 9.1 ohm
> 16 ohm
> 24ohm
> 30 ohm
> 36 ohm
> 56ohm
> 75ohm
> 82ohm
> 100 ohm
> 150 ohm
> 180 ohm
> 220ohm
> 430 ohm
> 820ohm
> 1kohm
> 1.5 kohm
> 1.8 kohm
> 2.4kohm
> 3.3 kohm
> 3.6 kohm
> 3.9 kohm
> 5.1 kohm
> 10 kohm
> 12 kohm
> 16kohm
> 27kohm
> 36 kohm
> 43 kohm
> 47 kohm
> 62 kohm
> 91 kohm
> 100kohm
> 120 kohm
> 160 kohm
> 180 kohm
> 270 kohm
> 330 kohm
> 360 kohm
> 430 kohm
> 560 kohm
> 620 kohm
> 910kohm
> 1.3 Mohm
> 2.4 Mohm
> 3 Mohm
> 4.7 Mohm
> 8.2Mohm
> 12 Mohm
>
> My question is, is this a good selection of values or are these more 
> odd
> ball values instead of useful values?  Are there values that there 
> should be
> more of and what are they?  I'm not looking to make a life-time buy 
> would I
> would like to purchase enough to keep me going for 1/2 a lifetime.  The
> sellers I'm considering are auspicious.e,	sureelectronics, and
> apmmall.engineering.  Has anyone had any dealings with these folks.  
> Or, if
> these are sketchy, are there any others folks recommend.  Thanks!
>
> James R. Coplin
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>