You will need a:
Fast Vibration Sensor e.g https://www.ebay.com.au/itm/5-Pack-Fast ... 2749.l2649
A 1.5K ohm resistor e.g https://www.ebay.com.au/itm/CR25-0-25W- ... ctupt=true
1 100nf Capacitor e.g https://www.ebay.com.au/itm/Monolithic- ... SwkHFb~huL
A stereo 3.5mm jack plug and wire (i cut up a headphone lead)
A mount (your design)
Ok so the microphones supplied by Labrader have a low pass filler in hence the cap and resistor. You may get away without but realistically its easy and cheap to build so why risk it. To wire up simply connect one leg of the capacitor to one leg of the resistor to one leg of the vibration sensor (three connections on one joint) now connect the other leg of the resistor to the tip of the jack (normally the blue wire) the leg of the capacitor to the middle of the jack (normally the red wire) and the remaining leg of the vibration sensor to the back of the jack (normally the screen) and you have it a vibration activated trigger for the Labradar.
![Image](https://live.staticflickr.com/65535/50193898646_baa426c0e2.jpg)
Trial Setup