What is the proper zero orientation for a SMT LED?

According to IPC-7351, the cathode should be on the left for a molded diode. Echter, when I use component wizard of my suppliers to create a diode, it places the cathode (K) on the right. Does it depend on the manufacturer? How does the assembly house know which way is correct?

November 23, 2023

We prefer cathode on the left, as per the standard, but typically rely on silkscreen or customer input to determine the proper orientation.

Lees verder: PCB-lay-outdiensten

#PCB-assemblage

Olivier Smit

Oliver is een ervaren elektronica-ingenieur met kennis van PCB-ontwerp, analoge circuits, ingebedde systemen, en prototyping. Zijn diepgaande kennis omvat schematisch vastleggen, firmware-codering, simulatie, indeling, testen, en probleemoplossing. Oliver blinkt uit in het omzetten van projecten van concept naar massaproductie met behulp van zijn elektrische ontwerptalenten en mechanische vaardigheden.

Olivier Smit

Wat anderen vragen

Do you use SMT or THT for USB mini B connector?

This question is about the advisability of continuing to use a USB mini-B right angle surface mount connector in my pcb designs. On occasion we see one of these connectors peel back or delaminate off the pcb. Immediately the question is asked, why didn’t you use a through hole connector?

Olivier Smit december 11, 2023

How can I mount a pulse oximeter on the surface of PCB without putting too much stress?

The PCB has a pulse oximeter mounted on the surface, and it’s tolerance is 0.6mm. The problem is the pulse oximeter needs to touch the bottom case at all times. How to best mount the PCB in the case without putting too much stress on the pulse oximeter? Will screws with flexible washers be all right? Sadly separating pulse oximeter from main PCB is not an option.

Olivier Smit december 5, 2023

Hoe bepaal ik de sporenbreedte bij het ontwerpen van een printplaat??

Our team are developing a portable medical device with a small size, so we need a small PCB. Hoe bepaal ik de sporenbreedte bij het ontwerpen van een printplaat?? Actually we want it as narrow as possible to fit the device, is it OK?

Olivier Smit september 25, 2023

What is the proper zero orientation for a SMT LED?

Olivier Smit

Olivier Smit

Wat anderen vragen

Do you use SMT or THT for USB mini B connector?

How can I mount a pulse oximeter on the surface of PCB without putting too much stress?

Hoe bepaal ik de sporenbreedte bij het ontwerpen van een printplaat??

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