User Manual

Turn on the slide switch (S1); the display on the LED-MC (U29) shows
“00”. Press the A button on the selector (S8) to increase the ones digit
on the display, and press the C button on the selector to increase the
tens digit on the display. When the display shows “21”, press the B
button on the selector to start.
The red/yellow LED (D10) will be on continuously, but changing colors
at varying speed. The red & green LEDs (D1 & D2) will be alternately
between on and off, opposite each other, and synchronized with D10.
The red & green
LEDs together
act as a bi-color
LED. Compare
them to the
red/yellow LED,
which is a true
bi-color LED.
Turn on the slide switch (S1). The programmable fan (M8) spins,
and changes the phrase displayed about once a second. See
project 15 to change the phrases displayed.
!
WARNING: Moving parts. Do not
touch the fan while it is spinning.
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Project 50
Dual Bi-Color Lights
Project 51
Fast Phrase Changer
This circuit uses the alarm IC (U2) to
control the programmable fan (M8),
cycling through the six phrases stored in
it faster than normal.