Tag Archives: light

Small project #12 ⅔ — IKEA Samtid mood-light BT firmware

Posted on April 28, 2015 by robert

A user of the “new” version of the lamp has undertaken the heroic task of writing the Bluetooth code for controlling it! Here’s a sneak-peak:

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Small project #12 ½ — IKEA Samtid mood-light-upgrade upgrade

Posted on April 16, 2015 by robert

Someone, I won’t mention any names here, practically coerced me into upgrading this little project a bit. Now there’s the option to add a bluetooth module (HC-05, JY-MCU “ZS-040”), which supports remote code upload, or a WiFi module (ESP8266-1) using … Continue reading →

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Spontaneous LED bulb teardown — IKEA 200lm candle #2

Posted on March 14, 2015 by robert

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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Spontaneous LED bulb teardown — IKEA 200lm candle

Posted on November 21, 2014 by robert

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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Small project #12 — IKEA Samtid mood-light upgrade

Posted on August 16, 2014 by robert

This upgrade is based on the loved-by-everybody WS2812B intelligent RGB LED and works just fine with Adafruit’s NeoPixel library. The concept is – once again – rather simple. Whack a lot of WS2812B RGB LEDs onto a small board, add … Continue reading →

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Small project #10 — IKEA Samtid reading-light upgrade

Posted on June 22, 2014 by robert

Yet another reincarnation of a PT4115 based LED lamp. This time I chose to add a micro-controller to the mix. No, not an ATtiny13 but an ATtiny45, as it contains a much desired feature for this job: high frequency PWM … Continue reading →

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Spontaneous LED bulb teardown — IKEA ledare 400lm

Posted on April 19, 2014 by robert

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

Posted on March 21, 2014 by robert

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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Small project #7 — USB powered inspection light

Posted on March 14, 2014 by robert

Quite often I run into the problem of getting light to where I need it when inspecting SMD solder joints. The ring-light I built some time ago provides a lot of light, but is too large to get close to … Continue reading →

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

Posted on May 2, 2013 by robert

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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Riding a bicycle at night — Most bikers are braindead…

Posted on December 7, 2011 by robert

… or will be ! It was at night, it was raining, ice rain at times, the roads were covered with slippery leaves. I met a lot of bikers – some of them had their lights on. I was still … Continue reading →

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Seeing by not seeing

Posted on March 15, 2010 by robert

What fun reading can be. Get yourself a few good books, lots of tea, some chocolate and read! I must have read “Feet of Clay” by Terry Pratchett numerous times, but it seems I hadn’t payed this quote the necessary … Continue reading →

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