Light Police Siren

Project Number: 22

Parts Needed For Circuit: B1, 4, 6, U2, U1, 5, 1, SP, S1, 3, 2, RP, 3, 2, 2, 2

OBJECTIVE: To build a police siren that is controlled by light.

Description: Build the circuit shown on the left by placing all the parts with a black 1 next to them on the base grid first. Then, assemble parts marked with a 2. Finally, insert the parts with a 3 last on level 3. Cover the photoresistor (RP) and turn on the slide switch (S1). A police siren with music is heard for a while and stops, then you can control it by covering or uncovering the photoresistor.