Author Topic: µRuler User Manual  (Read 4527 times)

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Offline timb

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µRuler User Manual
« on: November 18, 2013, 09:31:56 am »
µRuler Legend v1.0

oz
µm
ounce
micrometer/micron
Ounce to Micron conversion table for PCB copper thickness.

SMD FOOTPRINTS
POW
new + (old) SMD sizes in mm
Resistor Power
Size (in mm) of various SMD components plus the general power of resistors in that size.

mil
-->
mm
[Conversion Formulas]
thousandth of an inch
to
millimeters
mm to in/mil & vice versa
Table of mil to/from mm conversions plus formulas.

V
INT
MASK
BARE
>3km
volts
internal PCB layer
top PCB layer with mask
top PCB layer without mask
at altitudes above 3km
This table shows minimum PCB trace separation (in mils) for various voltages and locations.

mils
A/10°
A/5°
A/1°
mR/in
trace width
10°C above ambient
5°C above ambient
1°C above ambient
milliohms per inch
Maximum current for various trace widths (0.5oz copper) at several temperatures (°C) above ambient.

mils
A/10°
A/5°
A/1°
mR/in
trace width
10°C above ambient
5°C above ambient
1°C above ambient
milliohms per inch
Maximum current for various trace widths (1oz copper) at several temperatures (°C) above ambient.

mm
1°C
5°C
10°C
via size
1°C above ambient
5°C above ambient
10°C above ambient
Max current for various diameter 1mil thick vias at several temperatures above ambient.

SQ PIN
DIAmm
header size
equivalent diameter hole
Correct diameter hole needed for corresponding (square) pin size.

EIA SMD TANTALUM
capacitor number
capacitor letter
size in mm
Size (in mm) of SMD Tantalum Capacitors.
« Last Edit: November 19, 2013, 06:09:34 am by timb »
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Offline neilrudden

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Re: µRuler User Manual
« Reply #1 on: November 18, 2013, 01:25:52 pm »
POW - is this a general power rating for a resistor in this size?

>3km if used at altitude greater than 3km
 

Offline chip273

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Re: µRuler User Manual
« Reply #2 on: November 18, 2013, 05:11:53 pm »
Please remove the red shadow text, it really hurts in the eyes.
 

Offline creyc

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Re: µRuler User Manual
« Reply #3 on: November 18, 2013, 07:44:06 pm »
Please remove the red shadow text, it really hurts in the eyes.

Fixed that for you. And WOW that's painful to read!
« Last Edit: November 18, 2013, 07:45:49 pm by creyc »
 

Offline timb

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Re: µRuler User Manual
« Reply #4 on: November 18, 2013, 11:21:21 pm »
Sorry guys, internet went out this morning after it posted. Yes, red text will be removed, that was just for my benefit while editing. I'll get this cleaned up shortly!
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Online EEVblog

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Re: µRuler User Manual
« Reply #5 on: November 18, 2013, 11:48:43 pm »
POW - is this a general power rating for a resistor in this size?
>3km if used at altitude greater than 3km

Correct on both.
 

Offline timb

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Re: µRuler User Manual
« Reply #6 on: November 19, 2013, 04:40:09 am »
Almost done. mR/in is megohms per inch of trace, right?
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Online EEVblog

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Re: µRuler User Manual
« Reply #7 on: November 19, 2013, 04:42:51 am »
Almost done. mR/in is megohms per inch of trace, right?

milliohms! - small m, not big M
 

Offline timb

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Re: µRuler User Manual
« Reply #8 on: November 19, 2013, 04:44:43 am »
Almost done. mR/in is megohms per inch of trace, right?

milliohms! - small m, not big M

Doh! :palm:

Of course... Fixing that and adding descriptions for the last few tables and I should be done.
« Last Edit: November 19, 2013, 04:54:01 am by timb »
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline timb

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Re: µRuler User Manual
« Reply #9 on: November 19, 2013, 04:54:29 am »
Okay, initial post is done! Anything need correcting?
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline samgab

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Re: µRuler User Manual
« Reply #10 on: November 19, 2013, 05:35:42 am »
Okay, initial post is done! Anything need correcting?

"Ledgend"... really?
 

Offline timb

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Re: µRuler User Manual
« Reply #11 on: November 19, 2013, 06:11:39 am »
Okay, initial post is done! Anything need correcting?

"Ledgend"... really?

Sorry I didn't notice a typo? The spellcheck either didn't catch it or I didn't notice. No need to be sarcastic, it's fixed now.
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline don.r

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Re: µRuler User Manual
« Reply #12 on: December 02, 2013, 04:47:20 am »
Nice work Tim. Can we have this stickyed?
 


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