Hi everyone,
Here is a potentially good discussion topic. I sometimes watch Ghost Hunters, and they have a little geophone that they place on the floor of a house that they suspect might have paranormal activity. It of course picks up vibration as from footsteps, and converts that vibration to a voltage to light a string of LEDs, with a stronger signal lighting more of them.
I'd like to make one of these, as simple, quick & dirty as possible. I am thinking maybe a condenser mic could work to pick up the "eerie sound of footsteps" (lol), and an opamp or 2 to amplify the very small signal into something that could light up 3 or 4 LEDs. My fiancee would love this; we go into old houses quite a bit, and like to scare ourselves, ha ha.
Does anyone have any thoughts, or even a design, on how this could be implemented?
Thanks,
~Mike
Here is a potentially good discussion topic. I sometimes watch Ghost Hunters, and they have a little geophone that they place on the floor of a house that they suspect might have paranormal activity. It of course picks up vibration as from footsteps, and converts that vibration to a voltage to light a string of LEDs, with a stronger signal lighting more of them.
I'd like to make one of these, as simple, quick & dirty as possible. I am thinking maybe a condenser mic could work to pick up the "eerie sound of footsteps" (lol), and an opamp or 2 to amplify the very small signal into something that could light up 3 or 4 LEDs. My fiancee would love this; we go into old houses quite a bit, and like to scare ourselves, ha ha.
Does anyone have any thoughts, or even a design, on how this could be implemented?
Thanks,
~Mike