Oliver Smith

How do I find a PCB schematics for a device?

We are new brand of medical device. We are doing a device development recently. How can we find PCB schematics…

1 year ago

How can I determine BGA land pad diameter for given ball diameter?

I'm working on a project which requires the use of a CSP package. The product's datasheet provides ball pitch and…

1 year ago

How can I fix the PCB to the mechanical structure?

I designed a PCB with an imaging sensor that is mechanically coupled to a lens assembly using four 2-56 screws.…

1 year ago

Can we do wave solder the through hole parts without masking it?

We would like to do wave soldering for the through hole components. All through hole components are top side of…

1 year ago

Why does my RF PCB have small holes in the ground polygon?

I ordered RF PCB design and prototype from my supplier . There are something like a hole, but it is…

1 year ago

How can I separate PCB antenna and SMA connector?

I am designing a prototype PCB for a Lora node. It will have an SMA connector (J2) and a PCB…

1 year ago

CEM3 or FR4 PCB, which is the lightest material?

There is nothing about weight in the substrate datasheets I found. Between CEM-3 or FR4, which is the lightest material…

1 year ago

What kinds of test is suitable for low volume PCB order?

I've ordered fabrication and assembly of small PCB batches (100pcs) a couple of times already. Each time the factory asked…

1 year ago

Why do all the ground leads short outs beteween each other after Packing Virtex-4 via BGA?

After We have assembled the Virtex-4 FPGA BGA package on our custom design PCB, we check for short circuits between…

1 year ago

What’s the meaning of “CR” marked on the PCB?

Receive the PCB prototype from supplier. And see a CR mark on the board. What does it mean? Is it…

1 year ago