Ik vergat een weerstand op mijn PCB-prototype – hoe voeg ik er een toe?

I need to add a resistor into a data line on my project. The data line is a trace and carries low speed data. A through-hole resistor will be fine. The pins for both ends of the trace are exposed, but how do I add the resistor and remove the trace?

oktober 26, 2023

If your PCB has a solder mask, you can fix this with an SMT resistor even when traces are close together. Cut the trace and scrape the solder mask away on both sides of the cut, over a few mm. Solder an 0603 of 0402 over the cut. If I patch like that, I actually make two cuts a mm apart, and remove the trace by dental pick between both cuts to make sure there’s a decent interruption of the trace.
alternatief, you can do the same and solder a PTH resistor, whose wires you first bent so that they lay flat on the trace. Won’t probably work as well on narrow traces, like 0.5mm.

Lees verder: Een korte handleiding voor prototype PCB-assemblage

#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

Is there a surface-mount component I can put on a pad, that simply has another pad on top that I can solder something on to?

We found that edge-mounting a TO-Can package to a PCB will really save a lot on manufacturing. Echter, it comes with fairly long through-hole pins that are taking up too much space to reach the pads. Any suggestion?

Olivier Smit december 4, 2023

Waarom viel het SMT-pad er gemakkelijk af tijdens het solderen van de printplaten??

I am a buyer in a telecom company. Kort geleden, an important order of SMT PCBA is delayed due to insophiscated production of a supplier. I am thinking about replace it and just very puzzled about how did their SMT pad fall off easily when soldering the PCB boards. That slows down the whole process.

Olivier Smit september 19, 2023

What does “run a panel” bedoel in de context van PCB/PCBA-fabricage?

A design engineer told me our PCB prototypes would be completed soon and then he would have his assembler “run a panel”. Does anyone know what that means?

Olivier Smit oktober 26, 2023

Ik vergat een weerstand op mijn PCB-prototype – hoe voeg ik er een toe?

Olivier Smit

Olivier Smit

Wat anderen vragen

Is there a surface-mount component I can put on a pad, that simply has another pad on top that I can solder something on to?

Waarom viel het SMT-pad er gemakkelijk af tijdens het solderen van de printplaten??

What does “run a panel” bedoel in de context van PCB/PCBA-fabricage?

Lees gedetailleerd advies uit blogartikelen