How can I mark diodes and LEDs on PCB to avoid confusion of Chinese PCB fab?

(On every board we submit a design for assembly, some designers may make PCB fab confused about the orientation of diodes or LEDs. And we had both Eagle's default diodes and KiCad's default diodes sent back from Chinese fab.)

September 19, 2023

I guess, we may add a silkscreen “+” and “-” just outside of the footprint on either end. Just put the diode schematic symbol on the silkscreen. Very Clear.

#LED #PCB Design

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

What Others Are Asking

Which soldering iron tip should I use?

All of the soldering I’ve done to this point has been with through-hole components. I hope to move up to some smaller surface-mount parts at some point in the future. I’ve got a Weller WES51 soldering station. There is a large number of ET series tips available. How do I choose the right tip for the components I’ll be working with?

Oliver Smith December 13, 2023

Why the PCB is cold, but LED bulbs are still hot?

I have a THERMAL problem when designing a power LED ALUMINUM PCB. I have 10 5W UV power LEDs.Coldwater flows through water heat sink continuously. The problem is the PCB is cold, but LED bulbs are still hot? Can anyone give me some advice.

Oliver Smith October 27, 2023

Is it possible to replace an automotive wiring harness with PCB?

Is it possible to replace an automotive wiring harness with PCB? For example, just have the cables attached on either end of the circuit to eliminate a bunch of messy cableage in between.

Oliver Smith October 11, 2023

How can I mark diodes and LEDs on PCB to avoid confusion of Chinese PCB fab?

Oliver Smith

Oliver Smith

What Others Are Asking

Which soldering iron tip should I use?

Why the PCB is cold, but LED bulbs are still hot?

Is it possible to replace an automotive wiring harness with PCB?

Read Detailed Advice From Blog Articles