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Tag Archives: LED
The Tale of “Nitecore” Keychain LED lamps …
www.youtube.com/watch?v=rZjXpqfiAhc”>sponge-bob
Once upon a time there was an overly enthusiastic browser of ebay items, instigated by “BigClive” to buy stuff. He purchased two Nitecore knock-off lights, a bit too cheap to be true! The packaging looks surprisingly good. Guess which one … Continue reading
Posted in Electronics.
Tagged cheap, ebay, failure by design, keychain, lamp, LED, nitecore
Comments Off on The Tale of “Nitecore” Keychain LED lamps …
Spontaneous LED bulb teardown — OSRAM AA66588 [10W]
Yes, yet another power-supply failure!
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!
Posted in Electronics.
Tagged aliexpress, CE, customs, follow-up, import, LED, RGB, RoHS, WS2812B
4 Comments
Soldering for masochists — LED indicator 0402 edition
Purple circuit boards are available on oshpark. $2.30 for a three-pack (free shipping).
Posted in Electronics.
Tagged 0402, 8-bit, indicator, LED, masochistic
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ISML + WiFi — ESP8266 finally tamed, but…
Preliminary testing of WiFi control using the ESP8266 module.
Posted in Electronics.
Tagged AVR, erratic behaviour, ESP8266, IKEA, ISML, LED, mood light, RAM, RGB, Smatid, usage, WiFi, WS2812B
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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.
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
Filamented LED light bulbs — Would be nice if…
…they did work as expected.
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
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
Spontaneous LED bulb teardown — IKEA ledare 400lm
I bought this LED bulb about 21 months ago for €11.99. I liked it!
Posted in Electronics.
Tagged bulb, IKEA, LED, ledare, light, overheating, teardown, Texas Instruments
5 Comments
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.
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
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
Posted in Electronics.
Tagged 12V, cable, copper, cord, ebay, IEC, LED, power supply, strip, warm, white
3 Comments
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!
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
Posted in Electronics.
Tagged AVR, camera, digital, illumination, LED, light, macro, Pentax, S5z
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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.
Small project #1 — 8bit breadboard port status indicator
A real quicky! Want one? Check out tindie.com
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.