What is inside of the color changing candles?

I have always been curious what’s inside of these color changing candles (nice mood light) which have color changing LED on bottom. Most famous ones are probably Air Wick ones. I finally disassembled one to check it out. This little thing which brings romantic atmosphere can also bring “second hand” joy to rip it apart and discover parts and make something useful. As everything with LED’s /electronics inside :)

Findings and how color changing candles work

The candle has a small electronic device in the base that is turned on by the infrared light (IR) given off by the candle when burning. You can point a TV remote to it and cause it to come on as well. At first I thought it’s a casual photo resistor. I was wrong.

I was expecting RGB LED but it was actually separate LED elements with different color for RGB. It was powered by 2 little 3V batteries (CR2032).

Now I have idea to hook it up with bigger RGB LED to drive it with this little chip. Would be easy to use “logic chip”- instead of using arduino or such. Will probably post article about it in near future.

Now the photos of disassembly

Digging trough candle wax.

LED color changing candle- digging trough wax

LED color changing candle- digging trough wax

 

Color changing candles- electronics stand

Color changing candles- electronics stand

After cleaning up we can see LED’s and little PCB

Color changing candle inside leds visible

Color changing candle inside leds visible

 

LED color changing candle- 3 LED's visible

LED color changing candle- 3 LED’s visible

 

Color changing candle inside electronics with batteries exposed

Color changing candle inside electronics with batteries exposed

 

LED color changing candle batteries CR2032

LED color changing candle batteries CR2032

Here we can see batteries used to drive it.

 

LED color changing candle electronics backside

LED color changing candle electronics backside

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