Thingiverse
Coin Pinger
door fifteenfifty
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Coin Pinger
Use to perform "Ping Test" to verify gold and silver coins are genuine.
I've noticed various commercial products and 3D printed solutions do not have a hinge. It seems unwise to bend plastic, especially FDM layered filament. So, here is a pinger with a hinge.
Materials:
1/4 x 13/32 spring
rubber band
3mm rubber screw thread protector / endcap
paperclip
Use with apps on your phone like Pingcoin or Bullion Test. No affiliation.
Use to perform "Ping Test" to verify gold and silver coins are genuine.
I've noticed various commercial products and 3D printed solutions do not have a hinge. It seems unwise to bend plastic, especially FDM layered filament. So, here is a pinger with a hinge.
Materials:
1/4 x 13/32 spring
rubber band
3mm rubber screw thread protector / endcap
paperclip
Use with apps on your phone like Pingcoin or Bullion Test. No affiliation.
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