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Issue 662 << Issue 661 | Issue 663 >>
The DIY Seismometer

10 Dec, 2013

Measure vibrations in the Earth or machinery

Detonation Detection and Recording

10 Dec, 2013

Using a cassette player, microphone and earphones to hear detonation.

Making your own Bellmouths

10 Dec, 2013

Aluminium bellmouths in minutes

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