Elenco LIGHT - Manual (Page 40)

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This circuit is similar to project 46, and works the same way. Build the
circuit as shown. Take one of the colored discs and install it into the disc
holder, then place the disc holder on the motor (M1). Connect the white
LED (D6) to the red & black jumper wires.
For best effects, do this in a dimly lit room. Turn on the slide switch (S1).
Push the press switch (S2) until the motor spins continuously (if it stops
after you release the press switch, replace your batteries). Hold the
white LED upside down over the disc holder so it shines on the spinning
disc, and move the lever on the adjustable resistor (RV) slowly while
watching the pattern on the spinning disc.
The motor spins the disc so fast that it looks like a blur. However, as
you slowly adjust RV the pattern on the disc appears to slow down,
stop, and reverse direction. Patterns close to the disc center may be
moving at different speeds, or in different directions, from patterns
farther from the center!
If the motor does not continue spinning after you release S2, then
replace your batteries. If it still won’t keep spinning then replace the
5.1k
Ω resistor (R3) with the 100 Ω resistor (R1).
You can reduce the strobe speed by replacing the 3-snap on the
adjustable resistor (RV) with the 100k
Ω resistor (R5), just as is done in
project 48.
Project 53
Strobe Effects (VI)
Replace the disc in the disc holder with the one
shown here, and repeat projects 46-48. Observe
the strobe effects. When the disc pattern is totally
blurred, it will appear as purple, cyan, and yellow.
Combining equal amounts of red & blue makes
purple, green & blue makes cyan, and red &
green makes yellow.
Project 54
Make Your Own
Strobe Effects
Draw your own patterns on paper or cardboard, then cut them to the same
size as our discs. You can also draw patterns on the backs of our discs.
Put them on the disc holder and repeat projects 46-48. Have a contest
with your friends to see who can make the most interesting strobe effects!
You can also find lots of fun patterns and visual illusions by doing a search
on the internet. There is no limit to what you can do!
Project 55 Another Strobe Light
Tab
Slide tabs into slots.
Tab Tab
Place disc holder onto
the motor as shown.
Hold white LED (D6)
over disc as shown.