Why are there teardrops on PCB pads?
I received the PCB design file from supplier. There are some teardrops, which I have seldom seen. Why are there teardrops on the PCB design?
October 31, 2023
Oliver Smith
Technical Writer
Oliver is an experienced electronics engineer with over 7 years of experience developing products in IoT, consumer electronics, and medical devices. He is highly skilled in analog circuit design, embedded systems, PCB layout, firmware coding, and prototyping electronic products. Oliver’s expertise encompasses the full product development cycle, from concept to mass production. He holds a Master’s degree in Electrical Engineering and leverages his deep technical knowledge to deliver innovative electronic solutions.
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Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?
Last week, I visit a PCBA manufacturer for our new project. They not only introduce in-circuit tester but also flying probe tester, which can both ensure the quality level. So, Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?
October 31, 2023
Do modern LED lights use thermal vias?
I have a technical question about thermal management with mid-power LED diodes.Do you use thermal vias on the PC board anymore? Either under the LED diode footprint or even around the footprint?
Depends on the application limits and cost targets.
October 30, 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.
October 27, 2023
What’s the thickness of FR4 substrate that one should take when designing a micro-strip antenna with an HFSS tool?
I am designing a micro-strip antenna with an HFSS toll, what’s the thickness of FR4 substrate that one should take ?
October 27, 2023
What does “run a panel” mean in the context of PCB/PCBA fabrication?
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?
October 26, 2023
I forgot a resistor on my PCB prototype – how do I add one in?
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?
October 26, 2023
How can I minimize the moisture adsorption on FR4 PCB?
Although the adsorption of moisture by FR4 is quite low, what is the best way to minimize it or eliminate it completely?
October 24, 2023
How to find a datasheet for a part that doesn’t exist on the manufacturer’s website?
While bored recently, I decided to take apart a few old pieces of electronic equipment and attempt to reverse-engineer them. I’ve been doing pretty well, but I’ve come to an IC that I can identify but doesn’t seem to exist on the manufacturer’s website.
October 24, 2023
