madbeanpedals::forum

Projects => How Do I? Beginner's Paradise. => Topic started by: K3yPr0gg3r on March 30, 2016, 12:18:21 AM

Title: Re: Caps In NanoFarads and Other
Post by: K3yPr0gg3r on March 30, 2016, 12:18:21 AM
Hi,

Just starting with pedal building, and was curious about something. Why are ALL build document, (FILM), capacitors in NanoFarads when no companies carry anything but uF or pF? Found a conversion chart from the JustRadios site, so that seems to be helpful. Also, sometimes I find Caps in 5% and sometimes in 10%. If I mix does it matter?

Thanks
Title: Re: Caps In NanoFarads and Other
Post by: EBRAddict on March 30, 2016, 01:46:37 AM
Primarily for ease of notation. 1nF is easier to read than 0.001uF or 1000pF.

The names are just increments of 1,000

5% and 10% can be mixed, rock on. If the price is the same between a 5% and 10% buy the 5% otherwise don't bother. Unless you're designing a lab instrument and not a stompbox it probably doesn't matter.
Title: Re: Re: Caps In NanoFarads and Other
Post by: K3yPr0gg3r on March 30, 2016, 03:04:40 AM
COOL...Thank you, for both explanations! I've just had some frustrations with passive parts, IC's and Transitiors. I keep buying one thing at one specific place, (I.E. Jameco Electric is the only place I can find a Charge Pump, but they don't have any Caps or Resistors I need). Mouser and Mammoth have been the best so far. Anyway, thanks again...
Title: Re: Caps In NanoFarads and Other
Post by: brucer on March 30, 2016, 03:36:43 AM
Also, the pF, nF and uF units in BOM's are often used to designate ceramic, film and electrolytic caps.  I always check this against the layout or schematic, but it helps avoid mistakes when ordering parts.

Now, why Small Bear reports cap values in mF, I have NO idea!  :o
Title: Re: Caps In NanoFarads and Other
Post by: davent on March 30, 2016, 04:16:05 PM
Quote from: brucer on March 30, 2016, 03:36:43 AM

Now, why Small Bear reports cap values in mF, I have NO idea!  :o

Which is millifards where he wants to say microfarads, µF.

mF ≠ µF.

(http://www.aplusphysics.com/courses/regents/mathreview/images/metric_prefix.png)