Forum: µC & Digital Electronics SPOKA LED Light mystery

von Alex H. (alex73)

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Having found a nice hack of the IKEA spoka night light 
I thought to rebuild it.

Bought a lamp, and started reverse engineering, as there was more on the 
PCB as mentioned in the blog entry.

Doing this I found attached circuit around Q1, I absolutely have no idea 
what it might be intended for.

It is driven from two port pins (3, 4) from an 8 pin IC which might be 
some PIC (based on pin count and power pins in use as it is not 

The switch towards ground is used to turn the light on (color cycling), 
fixate color, turn light off.

So, if anyone could give me a hint, I'd just be too happy :-)


P.S.: I also attached backside of PCB with parts drawn on, just in case.
Q2-4 are labeled as S8050, which seem to be PNP too.
P.P.S.: Swith states on power part are drawn when battery operated 


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