Data Sheet

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257. Siren & Red Light Warning
Build the circuit shown on the left, then turn on the switch (62) and you
will hear some low volume sounds of a police siren from the speaker
(93). Also, you will see the heart LED (69) is ashing at the same time.
The voltage changes at the speaker input SP2 are changing the voltage
across the heart LED (69), causing it to icker.
258. Gun with Flash on Shot
Connect points C and D with a 4-wire (4) in project #257, turn on the
switch (62) and you will hear gun shots in low volume and the heart LED
(69) with ash at the same time. This type of a circuit can be used to
synchronize lights and sounds to create special effects.
259. Fire Siren & Red Light Warning
Connect points A and B with a 4-wire (4) in project #257, turn on the
switch (62) and you will hear a re siren in low volume and the heart
LED (69) will icker at the same time. The IC in the 3-in-1 (11) uses
AND and NAND (Not AND) gate logic to make the re engine siren
sound when T1 is active AND I/O1 and I/O2 are NOT active.
260. Five Space Battle Sound Effects
Connect points E and F with a 4-wire (4) and connect points C and D
with the press switch (61) in project #257. Turn on the switch (62)
and the sounds of space battle will turn on in low volume with the
heart LED (69) ashing with each sound. Press the press switch (61)
to step through the ve different battle sounds. The IC in the 3-in-1
(11) has these different sounds stored in memory and accesses them
sequentially as you press the press switch (61).
261. Music with Red Beat
Connect points G and H with a 4-wire (4) in project #257, turn on
the switch (62) and you will hear music in low volume and the heart
LED (69) will dance to the music. Notice how the red heart beats with
the music. This demonstrates how some devices can synchronize light
patterns to music.
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