Electronics Forum: resistor

Re: Question on Grounding Resistor

Electronics Forum | Wed May 24 11:07:24 EDT 2000 | Travis Slaughter

Use a low wattage resistor. It doesn�t take much to dissipate static electricity, but in a emergency hopefully the resistor could act like a fuse, burn up and go open before anyone gets zapped too bad.

bulk feeding chips

Electronics Forum | Wed Feb 26 13:21:30 EST 2003 | gregp

Are the markings on resistors the actual value? Do AOI machines look for these markings or do they just look to see if a component is present and placed well? Can anyone attest to the solderability of upside down resistors? Can anyone argue that u

unmarked chip resistors

Electronics Forum | Fri Sep 08 13:45:47 EDT 2017 | rvines1

Is the industry really moving toward unmarked chip resistors? I've been seeing a lot of unmarked 0603 resistors lately, and when I check the data sheets, all their photos are of marked parts, and they don't say anything about it.

unmarked chip resistors

Electronics Forum | Mon Sep 11 12:37:03 EDT 2017 | rvines1

Our AOI machines have actually caught wrong resistors before. A reel gets swapped, a vendor sends a wrong part, things happen. To think that we can't rely on resistor markings anymore, that just sucks.

Re: Question on Grounding Resistor

Electronics Forum | Tue May 23 20:35:03 EDT 2000 | Dave F

Ashok: Our procedure allows connecting a resistor of less than 1 Mohm between the mat and ground, if safety codes and/or other authorities require inclusion of a series resistor (to eliminate the safety hazard of touching a high voltage circuit with

Laser trimming of resistors on PCB

Electronics Forum | Tue Jan 30 21:15:51 EST 2001 | davef

You seem to pretty far from shore to begin thinking about boats and floatation devices. Most laser trimmers are used by: * Semiconductor fabricators * Resistive component fabricators * Hybrid circuit assemblers Component fabricators and hybrid [

Question on Grounding Resistor

Electronics Forum | Tue May 23 16:56:10 EDT 2000 | Ashok Dhawan

For grounding Table Mats/ Floor Mats and workstations, does grounding resistor need special characterstics e.g Wattage, material of construction, etc. We intend to use 1M Ohms resistor. EIA-625 does refer to EOS/ESD-S6.1 standard ( paragraph 7) fo

WAVE SOLDERING 0603 CHIP RESISTOR ARRAYS

Electronics Forum | Mon Apr 10 11:56:35 EDT 2000 | Robert Hutton-Squire

Suggestions please... I have to place a number of 1206 chip resistor arrays on the bottom side of my PCB for wave soldering. The device consists of 4 x 0603 resistors in a 1206 package. The device is available with either concave or convex terminati

Laser trimming of resistors on PCB

Electronics Forum | Tue Jan 30 11:14:25 EST 2001 | svenson

I have an idea of trimming the resistors on a teflon PCB (FR4) after mounting and soldering. Can I use a laser to cut on a smt mounted resistor while the PCB is in functional test? The goal is to balance the resistances for a telecom application. Ha

Silver Sulphide Contamination of Resistors

Electronics Forum | Wed Feb 21 11:25:04 EST 2001 | Dave E

We have had a problem with some resistors on some conformally-coated boards which, after a few months in the field, started going bad -- a real worst-case situation. The resistors would increase in value dramatically and sometimes develop diode-like


resistor, searches for Companies, Equipment, Machines, Suppliers & Information

Fluid Dispensing, Staking, TIM, Solder Paste

High Resolution Fast Speed Industrial Cameras.
Sell Used SMT & Test Equipment

Nozzles, Feeders, Spare Parts - Siemens, Fuji, Juki, Yamaha, etc...
SMTAI 2024 - SMTA International

High Precision Fluid Dispensers
Assembly Automation Technology

Training online, at your facility, or at one of our worldwide training centers"