Security House with 2 Outer Lights

Project Number: 22

Parts Needed: You will need the exact same parts from the preceding circuit, but follow the assembly instructions below.

Assembly (adult supervision highly recommended): 1. Place base grid supports on base grid A.

2. Place parts (except for the jumper wires) on base grids B & C, and install into base grid supports on grid A. The pegs should be facing inward.

3. Place remaining parts on grid A.

4. Place parts (except jumper wires) on grid D.

5. Mount grids D & E, at 45 degree angles and with pegs oriented as shown (down for grid D, up for grid E), on top of grids B & C using 6 stabilizers. Adjust the positions of the stabilizers as needed.

6. Gently place the light tunnel (U30) on grid E. 7.

Add the Q4 attachment and jumper wires (2 blue, 1 red, and 1 black).

Description: Modify the preceding circuit so the color LED (D8) shines up instead of down. Turn on the slide switch (S1); the LEDs (D6 & D8) and light tunnel should be on, but there should not be any sound. Now place your hand between the white LED and the phototransistor (Q4); an alarm sounds.

Mrs. Snappy: If desired, you can move the black the jumper wire from the (−) snap on the light tunnel to the R, G, or B snap on it.