Smoke Detector

Not Tested! ** Do not use in place of a certified alarm! ** Needs to be tested to see if light does not enter the chamber from outside. If you print one before I do, let me know how it goes! Print lid and base in black to absorb light, other colours may let in light. Also sand down the inside of your print if it is reflective, this will prevent light bouncing. You will need a 3mm LED in one end and a photoresistor (LDR) in the other, see photo. Attach the LED to a resistor and LDR via a v