Electronics Forum: electric resistance (Page 1 of 6)

PCB static electric arcing problem

Electronics Forum | Thu Nov 08 16:05:17 EST 2012 | davef

So, what is the battery going to do when you push your 'high voltage' through the 1-2 ohm internal resistance of the 9V battery? How about you doing a Google search on ... esd protection circuit?

Cracks on ceramic capacitors.

Electronics Forum | Fri Jun 20 10:27:19 EDT 2003 | Cristiano Dick Smiderle

Hi We are experiencing serious problem with ceramic capacitors. They are with low electrical resistence and the problem is intermittent. We found some of them with micro cracks but not all. What could be the causes for this problem? We are su

How to control and purchase the ESD at production floor

Electronics Forum | Thu Nov 10 22:57:48 EST 2005 | davef

The recommended electrical resistance for flooring from ANSI ESD S 7.1 and ANSI/ESD-S20.20 is

Conformal Coating Discoloration

Electronics Forum | Mon Aug 29 22:48:09 EDT 2011 | davef

Rich Here's what Humiseal says: Thermal Properties The coating must be able to withstand localized thermal 'hot spots' generated by components. High temperatures can cause short-term changes in coating characteristics, such as softening and lowered e

The bent ones.......

Electronics Forum | Tue May 02 16:33:18 EDT 2000 | Joe

hi, I am looking for some guidelines which can tell me when gullwing and finepitch leads are too damamged to repair. Copper gets hard when bent and the electrical resistance increases. When a finepitch component gets dropped a lot of pins need staig

Graphite/Carbon deposit on PWB ( any Industrial Specs?)

Electronics Forum | Thu Feb 26 15:49:48 EST 2009 | GSx

Hi I am looking for informations/specs about graphite/carbon deposited on PWB as a "spring contcat" or land (? not sure how to say in English). - Are there any Standards (IPC?)who define correct thickness of graphite ? - Are there any Test Method

Pneumatic vs Electrical screw drive

Electronics Forum | Sun Oct 27 21:47:25 EST 2002 | raton

Electric drivers are harder to adjust wich keeps production people from messing with 'em. Electrics are resistant to other variables such as air preassure, quality, other air supply users on the same line and so on. I prefered to use all electric e

Wave Soldering Flus Selection

Electronics Forum | Thu Jun 14 22:50:45 EDT 2001 | gregH

Hi, I read an article that says "Flux selection usually depends on the following factors": a) Solderability of pcb base metal or coating b) Corrosivity of vapours and residues c) electrical resistivity of residues d) Ease of removal of residues e)

SOT23 jumping off pads when reflowing

Electronics Forum | Tue Sep 16 23:58:03 EDT 2003 | iman

interesting! I recently invested a small personal fortune into books nad other related literature to boost my understanding the scientific properties of materials used in electronics and interconnection packages. One area( one of many areas) of p

Resistance Shift with Lead free

Electronics Forum | Fri Jan 20 08:55:31 EST 2006 | patrickbruneel

Steve, How do you measure the resistance is it by probing the surface? Concerning the alloy there is a straightforward linear correlation between the tin content and the electrical conductivity of the alloy. The higher the tin content in the alloy,

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