Re: marking schemes for SMD resistors

"Winfield Hill" <Winfield_member@xxxxxxxxxxx> wrote in message
news:e20af70246j@xxxxxxxxxxxxxxxxxx
Michael A. Terrell wrote...

colin wrote:

I've come accros some marked 1R0, 1210 case size, I've never seen 1k0
etc
though, maybe its just the low values. the coding system I came across
on
some 1% 0603 is rather anoying, you have to look up a 2 digit code to
find
the 3 digit value and look up the letter to find the multiplier value.

Colin =^.^=

The "R" is used in place of a decimal point to make sure the value
can be read. I wrote some javascripts to decode the three digit 5%
values and another for the the four digit 1% and .1% values for
production and stockroom workers. I'll put them on my website if anyone
is interested. I also have one for SMD capacitors with the number/letter
ID codes if anyone needs it.

That sounds both useful and interesting, Michael. I like reading
javascript code. :-) Put it up for us, with a link from here.

Ive only just got into using javascript for some elementry calculations, I
got fed up calculating reactances etc ever since i lost my walchart from an
early issue of everyday electronics, and a single web page is far easier
than creating a whole c++ application wich I would otherwise have done, it
was just a smallish table of hand entered values, but I will try and make it
so moving the cursor over the table gives all the inbetween values.

I also just did a page to list all the frequencies available from a PLL
within a range of N and R divisor values. only drwaback is it seems to get
suddenly get very slow once a certain number of array entries is reached
although this can be minimised.

Incidently the problem I find with the 2 digit + 1 letter 0603 1% codes is
they are extremly hard to distinguish (I need to use a microscope to
distuinguish the last letter) its so easy to read 10C (12.4kohm) as 100ohms

I dont know if this is common but I always used to surprise people when I
could read colour resistor codes instantly, (especialy when I was working as
a software engineer)

Colin =^.^=


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