Search found 17 matches

by catherine12297
Fri Dec 14, 2018 5:12 pm
Forum: Fusion PCB/ PCBA Services
Topic: what is Components Placement Drawing ?
Replies: 6
Views: 4584

Re: what is Components Placement Drawing ?

If you haven’t created AN assembly drawing before, this can be an honest introduction for you to the method. I promise this won’t be a thirty-page manual with style sketches that seem like my children’s preschool drawings. Knowing the various components of AN assembly drawing, and the way your PCB l...
by catherine12297
Tue Dec 11, 2018 2:05 pm
Forum: Fusion PCB/ PCBA Services
Topic: How to best panelize these boards?
Replies: 2
Views: 1980

Re: How to best panelize these boards?

These guidelines are intended for PCB designers, who must understand the basics of assembly methods (including panelization concepts) applicable to their designs if there’s any hope they will consistently turn out manufacturable board designs. These are also targeted at the PCBA process technician t...
by catherine12297
Thu Dec 06, 2018 6:35 pm
Forum: Fusion PCB/ PCBA Services
Topic: Dielectric Constant of PCBs
Replies: 1
Views: 1605

Re: Dielectric Constant of PCBs

You can look up the specs of the material at the PCB producer. The dielectric constant doesn't depend on the frequency but the loss in the material does. If the application has to be very precise go for Rogers material otherwise FR4 is good until several GHz (assume er=4.5). When working with micros...
by catherine12297
Wed Dec 05, 2018 7:10 pm
Forum: Fusion PCB/ PCBA Services
Topic: Aluminum PCB Thermal Conductivity
Replies: 7
Views: 1884

Re: Aluminum PCB Thermal Conductivity

The warmth exchange coefficient is characterized as the temperature distinction between the opposite sides of the surface in 1m (K, ℃), in 1 second (1S), through the warmth exchange zone of 1 square meter, the unit is W/m ° (W/(m · K), where K can be supplanted by ° C). Warm conductivity is just for...
by catherine12297
Tue Dec 04, 2018 12:49 pm
Forum: Fusion PCB/ PCBA Services
Topic: PNIODiag handling multiple PLC's
Replies: 0
Views: 442

PNIODiag handling multiple PLC's

Is diagnostic package PNIODiag able to handle multiple PLC's from one visualization?
by catherine12297
Fri Nov 30, 2018 6:34 pm
Forum: Fusion PCB/ PCBA Services
Topic: Aluminum PCB Thermal Conductivity
Replies: 7
Views: 1884

Re: Aluminum PCB Thermal Conductivity

To understand the heat transfer properties of thermal interface materials (TIMs) we need to understand the meaning of thermal conduction, convection and resistance. The following is a sneak peak from Clemens Lasance's Thermal Interface Material Basics for Electronic Engineers . Clemens recently pres...
by catherine12297
Wed Nov 28, 2018 7:43 pm
Forum: Fusion PCB/ PCBA Services
Topic: How to repair/replace PCB soldering plate
Replies: 2
Views: 1728

Re: How to repair/replace PCB soldering plate

If you look closely there's a trace running down from pin 4 to an unpopulated pad right next to the bottom most of a group of 3 components (likely a resistor; probably for limiting the slew rate). If you run a wire from the pin 4 on the SD card slot to the unpopulated pad, it should do the job. Pad ...