Project #91
Two-Tone Twinkler
Project #89
Flashing Flare
Project #90
Touch & Go
Connecting the output of the Alarm
or Music ICs to multiple devices
(such as the LED, speaker and
lamp) enables these devices
operations to be synchronized.
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Build the circuit
shown on the left.
The circuit uses
the Alarm and
Space War ICs to
flash the LED
(D1). Turn the
switch on and the
LED
starts
flashing.
Wet your fingers with some
water or saliva and touch them
across points A and B several
times to hear some space war
sounds. Push the press switch
(S2) to hear more sounds at
the same time.
This circuit uses your body to
conduct electricity, and turn on
the circuit. Wetting your fingers
improves the connection
between the metal and your
finger.
Turn the switch (S1) on and the lamp (L1) and LED (D1) start flashing.
You hear two different tones driving the LED and lamp. ICs can be
connected to control many different devices at the same time.
CM-125_Manual_031514.qxp_CM-125_Manual_031514 4/2/14 12:20 PM Page 47
