How to panelize PCBs in Eagle

These days, you can get custom PCBs made really cheap – a few dollars for a couple of 100×100 mm boards, complete with silkscreen, vias, everything. But even with these low prices you might want to have a couple of smaller boards produced on one, larger board. Let’s clarify something first – I won’t be … “How to panelize PCBs in Eagle”

Read More

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”

Read More

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”

Read More

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”

Read More