Dried Seed Timer

A time delay device for electrical firing circuits can be made using the principle of expansion of dried seeds.

MATERIEL REQUIRED:

Dried peas, beans or other dehydrated seeds

Improvised Rifle

Expansion of the seeds will raise the metal disc until it contacts the screws and closes the circuit.

CONNECTING WIRES r—EXPLOSIVE

Wide mouth glass jar with non-

Two screws or bolts J ft U | TIM1

Thin metal plate

Screwdriver [SggAy

PROCEDURE:

1. Determine the rate of rise of the ciriea seeds selected. This is necessary to determine delay time of the timer.

a. Place a sample of the dried seeds in the jar and cover with water.

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