Description

Hand-cranked cam turning against both a straight follower and a lever follower

Ratchet-stopped nickel-plated brass 25 mm micrometer screw gauge reading to 0

Millimeter-graphed 100 x 75mm screen on a 2

Built for wing-spreading during insect mounting

Reed Relay Demonstration Board Science at Home_General Science Supplies Hand-cranked cam turning against bothDemonstrates electromagnetic switching on a base with 4mm plug connections, where current through a coil closes a separate contact and shows how a small signal controls a larger circuit.

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Reed Relay Demonstration Board Science at Home_General Science Supplies Hand-cranked cam turning against both

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