A trip wire sets off a clearly defined alarm tone. The transparent trip wire pulls a dowel peg out of
Basic circuits Model of a basic circuit for a flashing light. Contains all necessary parts and instructions. Joining is by
A small electronic organ with unlimited switching variations. Frequency is controlled by capacitors and resistors.Sound by the use of potentiometers
Electronics Construction Box Designed as an introduction to electronics. The instructions and materials are especially designed for use by children.
LED Traffic Light Once connected to a 4.5 V power source the LEDs light up repeatedly in red – yellow