This is a door lock which can only be opened by a sonic screw driver. This uses a raspberrypi a microphone and a sonic screw driver
Finally I don't have to worry about Time Lords being locked out of my room.
Hooked up all the components, and everything worked great. Time for the install
So the door strike arrived this week and I just wired it up and filmed a little video showing it working. Just need to get the software running on the pi and then hook everything up together....
So the code appears to be working well. I posted some plots of the recored data and the FFT of the high and low version of the Sonic Screwdriver.
Am going to test on the rpi to see how taxing the FFTs are on the processor.