Chris Greening obtained several Philips Hue LED light bulbs and decided to do a thorough teardown.
The power board and the logic board are separate components, they separate quite easily even when covered in the potting compound. Once they are separate you can attack each on in turn.
The Power Board takes in the mains voltage, runs it through a bridge rectifier and then there’s a switch mode power supply generating 5V along with a high voltage (probably around 24V) for driving the LEDs.
The LED PCB has an 8-pin socket labeled A to H. B and C were pretty straightforward – they just connect to the thermistor.
The logic board has 5 P-Channel MOSFETs (to turn on various combinations of LEDs).
See the video below and more in the post here.
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- Source: https://blog.adafruit.com/2023/05/05/hue-lightbulb-hacks-reverseengineering-lighting-leds-mrbananas/
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