3D printing a stencil for applying solder paste

If you ever tried making more than a couple of the same PCBs at once, you probably came to the conclusion that soldering it by hand sucks and also takes a lot of time. The alternative – which is also how they do it commercially – is the so called reflow soldering. Simply said, it … “3D printing a stencil for applying solder paste”

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An interesting experiment: cooling a Cree LED on a normal FR4 PCB

Modern LEDs have enormous efficiency – up to 40 % – but this still means that if you mount a 5 W LED on a PCB it will generate up to 3.5 W of heat. In one of my recent experiments, I tried making a headlamp using a Cree XPG-BWT LED. I made a small … “An interesting experiment: cooling a Cree LED on a normal FR4 PCB”

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Trace & via current carrying capacity on PCBs from JLCPCB

If you ever designed your own printed circuit board, you might have wondered “how thick does this trace needs to be?” or “how big this via needs to be?”. As always, you can try to Google it – however, you will find a lot of conflicting information, and that is why I ordered a simple … “Trace & via current carrying capacity on PCBs from JLCPCB”

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