Tag Archives: LED

Spontaneous LED bulb teardown — OSRAM AA66588 [10W]

Yes, yet another power-supply failure!

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Importing LEDs from China — Battle with customs follow-up

Behold, the stickers of DOOM… If you should find any of these on a shipment to you, prepare for battle!

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Soldering for masochists — LED indicator 0402 edition

Purple circuit boards are available on oshpark. $2.30 for a three-pack (free shipping).

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ISML + WiFi — ESP8266 finally tamed, but…

Preliminary testing of WiFi control using the ESP8266 module.

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Spontaneous LED bulb teardown — Filamented LED light bulb

I finally was in the mood to tear down one of these filamented LED bulbs.

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Spontaneous LED bulb teardown — IKEA 200lm candle #2

Not too long ago one of these darn IKEA LED lamps (200lm, 4.3W) broke down after very mild usage. Well… it has happened again! When I went into my bathroom one or two hours ago, I thought I was going … Continue reading

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Filamented LED light bulbs — Would be nice if…

…they did work as expected.

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LED aging — one data point

These LEDs have been in use for about 3.5 years now. 28 out of 64 show discolouration. Fortunately these are used as a source of indirect light, bouncing off of a slightly yellow-ish wall. The effect is noticeable, but not … Continue reading

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Spontaneous LED bulb teardown — IKEA 200lm candle

It has happened again! After about 2 years of very mild usage (bathroom mirror light), an average on-time of about 5-10 minutes per day, yet another of my many IKEA LED lamps has died. This time it was a 4.3W … Continue reading

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Spontaneous LED bulb teardown — IKEA ledare 400lm

I bought this LED bulb about 21 months ago for €11.99. I liked it!

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PT4115 LED module – upgraded to Nichia NT2x757D LEDs

First the old version, using the best small LEDs I could get hold of at that time: Nichia NSSL157 and NSSW157 types driven at about 100mA.

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Sew-on coat-buttons — Blinky – Shiny – Tiny!

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WS2812B + ATmega168 breakout — a.k.a. RGB LED RING V3

No more software PWM, no more LED driver chips, just intelligent LED pixels. These things come with integrated controllers/drivers and support 24bit colors (8bit per R,G,B). This makes projects smaller and is much easier on the microcontroller, no more need … Continue reading

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Got some stuff on ebay — mostly OK

I like LEDs – a lot. A few days ago I found this special offer for a 5m warm-white LED strip on ebay and just couldn’t resist. It arrived today, was indeed shipped from Germany very quickly. So it seems … Continue reading

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Akafugu LED candle — custom PWM firmware

Random candle-imitating flicker is a good start, but if we can use PWM as well… MAKE IT SO!

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Small project #5 — Pentax s5z LED ring for macro shots

My trusty Pentax S5z still works reliably. I’ve had it for 8 years now. It doesn’t shoot HD videos and it requires a couple of replacement batteries now and then, but it makes quite nice macro shots (with the help … Continue reading

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Small project #2 — MBI5030 starter board

Want one? Check out tindie.com. Macroblock MBI5030, 16-ch constant current LED driver with PWM, SPI-like interface, requires external grayscale clock. Known-good source: Kingelectronics, latest datasheets.

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Small project #1 — 8bit breadboard port status indicator

A real quicky! Want one? Check out tindie.com

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Mood light coaster

Yes, that’s what you get if you throw some laser-cut acrylic sheets (via Ponoko or Formulor) and a LED board into one big pot and stir it vigorously.

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RGB LED Ring V2 + ShiftPWM — super smooth color fading

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