Elenco Electronics 202 - Manual (Page 49)

Project #90
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Project #89
OBJECTIVE: To connect multiple devices together.
In the circuit, the outputs from the alarm IC (U2) and music IC (U1) are
connected together. Build the circuit shown and then place the alarm
IC directly over the music IC, resting on two 1-snaps and a 2-snap.
Turn on the slide switch (S1) and you will hear a siren and music
together while the lamp (L2) varies in brightness. Press the press
switch (S2) and the fan spins, while the sound may not be as loud. The
fan may rise into the air when you release the switch.
Motor Sounds Combo
OBJECTIVE: To connect multiple devices together.
Motor Sounds Combo (II)
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
! WARNING: Do not lean over the motor.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
! WARNING: Do not lean over the motor.
In the circuit, the outputs from the alarm IC (U2) and music IC (U1) are
connected together. Build the circuit shown and then place the alarm
IC directly over the music IC, resting on three 1-snaps. Turn on the
slide switch (S1) and you will hear a siren and music together. Press
the press switch (S2) and the fan spins, while the sound may not be
as loud. The fan may rise into the air when you release the switch.
This circuit is similar to project #89, but the fan will fly a little higher
since the sound circuit no longer drives the lamp (L2) and therefore
uses less battery power.