“This is a another cool mosaic work made by my wife Mieke inspired by drawings of celtic dragons.I designed the electronics for the sound activated “breathing” red LED, that forms the ominous eye of the dragon.So this project is not for the faint-hearted. ;-)
The “breathing” LED is sound activated using a miniature electret microphone and will “breathe” as long as sound is detected. Once it is quiet, the dragon goes to sleep and the eye extinguishes.But when sound is detected again, the dragon wakes up again and the red eye will start “breathing” again.”