Category Archives: Electronics.

Well… electronics :-)

Throwing out old trash — impromptu tear-down

Everything must go! What a good excuse to “Take it apart!” ;-)

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“Still at war with customs” — yet another letter from the HZA

To be honest, I’m not looking forward to opening this letter… …but there is no way around it.

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Small project #14 — KIS-3R33S breakout — with citrus smell !

www.youtube.com/watch?v=4vuW6tQ0218″

Not “pining for the fjords”, but pining for the boards!

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Small project #13 — AVR-ISP level shifter (VCC+I/O)

Bought a cheap AVR-ISP programmer on Ebay, and you find out that while it does provide 3.3V, it is VCC-only & your device is NOT 5V tolerant on its I/O pins. BUMMER! This little board fixes just that issue. All … Continue reading

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

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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The “at war with customs” saga continues

Today, a Sunday, I discovered a letter in my mailbox. A LETTER FROM CUSTOMS – >> MAIN OFFICE

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Why is importing goods & customs such a pain in the ass?

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

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 — 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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Pogo pins — Get bent!

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Printed Circuit Boards — MIL-TFP41

It smell something… sniff sniff … yes, I smell BS!

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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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7805 FROM HELL

AAARRRRGGGHHHH!

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Acer AL1916 LCD monitor — attempted fix

For a couple of days now, the monitor doesn’t want to run on full brightness anymore. If I go up to 95%, it runs if warm, but might not start up. Set it to anything higher and it comes on … Continue reading

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Small project #12 — IKEA Samtid mood-light upgrade

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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KiCad BZR5025 full windows installer

Someone on the KiCad mailing list has created a windows installer of the BZR5025 code base, including libraries, demo projects, docs… I’ve mirrored it on my server for your convenience. KiCad downloads Please note that this version uses library-tables and … Continue reading

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Small project #11 — “674”

Don’t you just hate it when you run out of holes and have to use a bridge wire to some free patch on the proto-board? I thought so.

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