Tag Archives: LED

Accursed Diode Marking

Am I a broken record? Pretty much — especially when it comes to confusing diode marking. For example, everyone knows what the diode symbol looks like, and pretty much everyone knows which side is the anode and which is the … Continue reading

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Push-me Pull-you LEDs

I may never get tired of talking about LED and diode polarities. It’s so much fun. Not long ago, I wrote about two LEDs from the same manufacturer, marked with opposite polarities. I recently ran into another one, but at … Continue reading

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LEDs: Seeing Double

Like I do so often, I’m being a bit redundant. While I’m all for stamping out and eliminating redundancy, this is redundancy with a purpose (not a porpoise). Not long ago, in a galaxy not far away, I blogged about … Continue reading

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More Cautionary Tails

I recently wrote about the horrors of LED marking variations. Unfortunately, LEDs aren’t the only place to find inconsistencies in our world. Another part to keep a close eye on is the ubiquitous three-terminal voltage regulator. For just short of … Continue reading

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‘The Magic One’

It was 50 years ago today when a then 33-year-old scientist at General Electric invented the first practical visible-spectrum light-emitting diode, a device that GE colleagues at the time called “the magic one” because its light, unlike infrared lasers, was … Continue reading

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Fun with Electrolytics

I was fiddling with one of my robot boards the other day — popping some passives on and off and checking out subs and alternate values. I was doing this on a couple of boards at the same time. Everything … Continue reading

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My Mistake — Naturally

I received my PCBs for this project from Sunstone yesterday at about 10:10. I quickly dropped them into my box of parts and delivered it to the receiving pile-of-boxes in our shipping.receiving department. At 11:40 a.m. yesterday, I received an email … Continue reading

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