Manual

Turn on the slide switch (S1). The red LEDs in the light tunnel (U30) are
dim and blinking, and are in sync with the color LED (D8). For best
effects, dim the room lights and use new batteries.
The color LED is connected in series with
the light tunnel, making its color-changing
circuitry control both. The three red LEDs in
the light tunnel are connected in parallel
with each other, so each only gets a third of
the current, making them much dimmer
than the color LED.
Green LEDs take more electrical
energy to turn on than red ones,
so the LEDs may be a little
dimmer now.
Blue LEDs take more electrical
energy to turn on than red or
green ones, so the LEDs may be
a little dimmer now.
White LEDs take more electrical
energy to turn on than red or
green or blue ones, so the LEDs
are even dimmer now.
-66-
Project 119 Double Blinker
Use the preceding circuit, but
move the end of the blue jumper
wire from point R to point G. The
LEDs may be a little dimmer now.
Use the preceding circuit, but
move the end of the blue jumper
wire from point G to point B. The
LEDs may be a little dimmer now.
Use the preceding circuit, but
move the end of the blue jumper
wire from point B to point A. Now
the light tunnel LEDs are dimmer
but are changing colors; you may
need a dark room or new
batteries to see them.
Project 120
Green Double
Blinker
Project 121
Blue Double
Blinker
Project 122
Multi Double
Blinker
Use the project 119-122 circuits
but replace the color LED (D8)
with the white LED (D6). Now all
the LEDs are dimmer, and in
some cases may not light at all.
Project 123
White Double
Blinker
Here the LED brightness is
further reduced by the color-
changing circuitry in the light
tunnel.