Holly the Geophone I Made back in 2005 was LVDT coil based .
It was a solder wick spool that I reused in to a bobbin [noparse]:)[/noparse] .
I wound it with 28 AWG Mag wire and I used it with a Osc I made to resonate.
It was used like a metal detector ,, If the Slug ( moveing member of dectoor) was at rest( mid span) the output would be around 1V but with
but with the Slug comming closer to the coil it would increce the V to 1.5V
and full out was .5V ..
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!" peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
Franklin
Posts: 4,747
Comments
I wonder what's inside that seismic sensor????
It was a solder wick spool that I reused in to a bobbin [noparse]:)[/noparse] .
I wound it with 28 AWG Mag wire and I used it with a Osc I made to resonate.
It was used like a metal detector ,, If the Slug ( moveing member of dectoor) was at rest( mid span) the output would be around 1V but with
but with the Slug comming closer to the coil it would increce the V to 1.5V
and full out was .5V ..
Peter KG6LSE
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL