Loading ...
Loading ...
Loading ...
24
Build the circuit as shown. Place the glow fan on the motor
(M1) shaft, so that it is stable on the little black piece. Place
the clear ber optic holder on the white LED (D6). and the
black ber optic holder on the phototransistor (Q4), then
insert the ber optic cable between them, but don’t let it
lay close to the fan on the motor. For best performance the
ber optic cable should stand straight up in the holders,
without bending them. For best effects, place one of the
LED attachments over the light on the color organ, and one
on the color LED (D8).
Optional: connect a music device to the color organ (U22)
as shown, and start music on it (the color organ light will
change to the music, but you will not hear it unless you also
connect headphones).
Turn on slide switch (S1). A tone is heard from the speaker
(SP), and all the lights (D1, D6, D8, and on U22) are on.
Push the press switch (S2) until the motor reaches full
speed, then release it. The fan will rise into the air like a
ying saucer. Be careful not to look down on the fan when it
is spinning.
This circuit also works if you move the clear ber optic
holder from the white LED (D6) to the color LED (D8).
Project 22 Super Circuit
Headphones
(optional)
Music device
(optional)
+
Black
Clear
Project 23
Triple Strobe Light
Build this circuit and turn on the slide switch (S1). Adjust
the blink rate using the lever on the adjustable resistor
(RV), and by pushing the press switch (S2).
Note: In rare cases the circuit may not work at all settings
on RV. If this happens, move the RV lever to the side near
the strobe IC, turn the slide switch off and on to reset the
circuit, and only move the RV lever over a small range.
Use the preceding circuit but replace one of the LEDs
(D1, D6, or D8) with the speaker (SP).
Project 24 Noisy Double
Strobe Light
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.
Loading ...
Loading ...
Loading ...