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From: krw on 11 Jun 2010 20:26
On Sat, 12 Jun 2010 08:01:27 +1000, Grant <omg(a)grrr.id.au> wrote:

>On Fri, 11 Jun 2010 15:16:45 +0200, Jeroen Belleman <jeroen(a)nospam.please> wrote:
>
>>Uwe Hercksen wrote:
>>>
>>>
>>> Ian Bell schrieb:
>>>
>>>> Yes I tried 27000pF, 27nF and 0.027uF and get different results for each.
>>>
>>> Hello,
>>>
>>> it looks like they simply use a text field for the capacity value in the
>>> database instead of using a numerical valuea nd the unit F.
>>> Some capacitors own the attribute 27000pF, others 27nF and some 0.027uF.
>>> But using a numerical value of the capacity would require an input
>>> parser capable of processing 27000pF, 27nF and 0.027uF, of course also
>>> F, mF and for completeness also kF. May be in the future MF and GF is
>>> necessary too. ;-)
>>
>>It's not like parsing or printing numbers with multiplier prefixes
>>is hard or anything! In my opinion, compilers, calculators,
>>spreadsheets, databases, anything that pretends to be able to read
>>or write numbers should be able to do it.
>>
>>But almost none do.
>>
>>Spice makes an attempt, but gets 'M' wrong by a factor of 10^9.
>>Gnuplot does it too, with mixed success and poor convenience. I
>>have my own conversion functions, which I use everywhere. I know
>>of no others. Pathetic.
>>
>>Anyone wants to lobby to get this introduced into libc and excel?
>
>What, proper metric SI handling in US based software? Shirley you jest!
>
> :o)
>
>I'd like a calculator with eng units and proper rounding, like the old
>HPs had, but then I haven't bought an HP calc for a long time, the last
>one I had, I wore out the power switch -- non-repairable as it was direct
>to PCB copper and had worn it away over time.

The HP35s is decent. Nothing like the 45 or 11C, but worth the money.

>As to the M in spice, I think it started way back before case sensitivity
>became the norm for proper OSs. So one has to RTFM to find M is a 'meg'
>instead -- I've got far worse issues using LTSpice effectively than that.
>Not a spice user, so LTSpice is my first experience of it, I can do
>simple stuff so far, but still prefer pencil, paper and calculator for
>design work. It was good for playing with a snubber circuit recently,
>but I to guess parameters for a motor's inductance based on observation
>with a Tek DPO, certainly was a lot faster than rat's nesting and
>observation for that situation.
>
>
>The two local companies I buy from, Farnell and RS Components, their
>web sites show a lack of electronic knowledge by the database people.

I always use DigiKey's part search when browsing for parts, but rarely buy
anything from them (they're about 40% too expensive), They get around the
problem with pulldown lists. They don't use nF or mF, either.

From: JosephKK on 11 Jun 2010 23:39
On Sun, 06 Jun 2010 23:14:46 +0100, Ian Bell <ruffrecords(a)yahoo.com>
wrote:

>On 06/06/10 23:06, Joerg wrote:
>> Ian Bell wrote:
>>> I cannot seem to find a leaded 27nF film capacitor from any of the
>>> regular distributors. Seems like only the E6 series is on offer unless
>>> you go SMT.
>>>
>>
>> I vaguely remember that you might be in the UK so this may be more
>> convenient:
>>
>> http://uk.farnell.com/cornell-dubilier/dsf050j273/cap-polyester-0-027uf-50v-radial/dp/4616790
>>
>> http://uk.farnell.com/epcos/b81122a1273m/capacitor-class2-27nf/dp/9751653
>>
>
>Thanks for that. I searched Farnell for 27nF and I get no results, yet I
>just tried 0.027uF and up they pop - you would think Farnell would know
>better.
>
>Cheers
>
>Ian

Not at all. It is debatable whether Newark ingested Farnell or the other
way around. The two systems are still not completely merged.
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