Today I will show you how to use your smartphone as a detonation detection tool !
What you need:
- Smartphone with 3.5mm jack utilizing stereo out + microphone.
Like this: (this is a male connector, your smartphone is obviously female, just make sure your original headset jack is the same as in the picture below)
- External Stereo/Microphone adapter
Like this:
- Simple PC Microphone
Like this:
Can be found in any cheap PC microphone and many other devices,
- Alligator style clip
Like this:
- 3m (or any size that fits you) cable for the microphone
Solder the mic to the cable and place it in the clip
Like this:
Solder the other end of the cable to a jack
Like this:
Isolated headphone with good noise cancellation
Like this:
Now your hardware is ready !
You connect the adapter to your smartphone, mic to adapter and headphones to adapter.
Just download an app that keep the mic open (any recording app will do) and you have a DIY detonation detection tool !
Connect the clip to the engine block, in a typical knock sensor location (for best results)
You can control the volume with the smartphone volume (daaa) :)
P.S You can use a real knock sensor if you want (two wires)
Like this:
:)
