Manual

-26-
Modify the preceding circuit so the color LED (D8) shines up instead of
down.
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).
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.
Other side
view
Side view