Tag Archives: Diodes

How Should You Mark Your Diodes?

Current flows through a diode from the anode to the cathode – it will pass current only when the potential on the anode is greater than the potential on the cathode.¬†This is mostly true, but not always. For the common … Continue reading

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Indicating Polarity on Diodes

Everyone knows which way current flows through a diode. Right? Of course they do. Diodes only permit¬†current to flow in one direction. Well, sort of. In the case of your garden variety rectifier, barrier diode, or LED, that’s true. That … Continue reading

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How NOT to Mark a Diode

A while back, I wrote about ambiguity in the markings on electrolytic capacitors. In doing that, I cobbled together a little image to illustrate how surface mount electrolytics are marked. Take a look at the image below: Note how I … Continue reading

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Electrolytic Ambiguity

I’ve written about ambiguity a few times before, like this post about fiducials. But I’m not talking about the PCB today. I’m talking parts. More specifically, I’m talking about silkscreen markings for your parts on the PCB. Diodes have a … Continue reading

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Diode Silk Screen Markings

It still happens. In fact, it just happened last night. We had a PCB with plus (+) mark to indicate the polarity of diode. Unfortunately, that doesn’t tell us which way to put the diode. (Read why here.) You just … Continue reading

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