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30
Build the circuit as shown; note that the 5-snap wire is partialy covered by
the NPN transistor (Q2), and a 3-snap wire is partially covered by the green
LED (D2). Place one of the disco covers on the disco motor (DM).
Turn on the slide switch (S1). A siren sounds, the disco motor spins & lights,
and the display on the LED-MC (U29) displays “00”. Push and hold down the
press switch (S2) to spin the programmable fan (M8); if you hold it down long
enough then it cycles through 6 messages.
Make the display on the LED-MC show “02” or “03” by pressing the A button
on the selector (S8) to increase the ones digit on the display. Press the B
button on the selector. The LEDs (D1, D2, & D10) will ash while the display
on U29 displays a random pattern; sometimes they will be rapidly changing,
and sometimes they will stop for a few seconds.
Project 61
Finale
Disco Cover
SUPPORT BAR
This circuit uses all
the parts in your set.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.
Go to https://shop.elenco.com/
consumers/snap-circuits-arcade.
html to download projects 62-203
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