Paranormal Life Sept 2014 | Page 9

Construction:

BG MICRO has a datasheet available here under their old kit number (http://www.bgmicro.com/pdf/kit1019.pdf) which shows the connections. You have 2 choices when building your geophone. You can built is as received or you can modify the display board to better suit your needs.

Build 1 (As received)

1.Solder wires onto the geophone terminals. Connect the negative wire to pin 1 of J3 and the positive wire to pin 2 of J3

2.Connect the batter clip to J1 where the negative wire is attached to pin 2 and the positive wire is attached to pin 1

3.Attach the jumper across J1

4.Attach the battery

5.Adjust R1 and lightly tap the surface of the geophone to see its reaction

6.Install all items into an enclosure

Build 2 (Alternate)

Note Build 2 requires some desoldering skills.

1. Solder wires onto the geophone terminals. Connect the negative wire to pin 1 of J3 and the positive wire to pin 2 of J3

2.Attach the jumper across J1

3.Desolder R1 from the board and add wires to extend the connections to the 50Kohm variable resistor. Mount this resistor to your project box.

4.Use the switch on the resistor to connect the negative battery clip lead to the circuit board using the switch as a cut on / off device

5.Attach the positive lead of the batter clip to pin 1 of J1

6.Attach the battery

7.Adjust the variable resistor to control the sensitivity

8.Install all items into an enclosure

For more customization you can desolder the leds and extend them to the enclosure in any pattern you like. There are also other things that can be done with the output to include adding audio feedback etc.

How to use this device:

This device can be left in places where you can see it on camera to record its reaction. When you hear pops, bangs or footsteps, you can see if they noise actually came from a physical reaction in the environment. This device can also be used to detect other forms of vibration to include earth tremors, trains passing etc so consider it a multipurpose tool and learn how it reacts to its environment.