Blowing out an electronic candle !
Pointless project, but fun.
Here are the resources links –
The project I was reminded of:
They used a hot wire wind sensor, but with my mic circuit detecting well when blown across, that’s the route I took 🙂
LM386 microphone amp circuit:
Arduino code:
https://www.dropbox.com/s/zrkjvfhela3bae7/Candle_Snuffer.ino?dl=0
A small hole was made next to the LED, so that the wind can hit the microphone that’s glued under it.
The lipo is a 3.7V 250mAh, though could have been much smaller, it was just on hand. It connects to the RAW and GND pins.
This Arduino is a 5V, but runs perfectly fine and the LM386 is also a regular no frills ordinary version, working fine at the lower voltage too.
