Elenco Projects 102-305 - Manual (Page 30)

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Project #176 Blow Off a Doorbell
OBJECTIVE: To turn off a circuit
by blowing on it.
OBJECTIVE: To turn on a
circuit by blowing on it.
Replace the speaker (SP) with
the 6V lamp (L2). Blowing into
the microphone (X1) turns on the
light, and then it goes off again.
Project #179
Blow On a
Candle
OBJECTIVE: To turn off a
circuit by blowing on it.
Project #177
Blow Off a
Candle
Project #178 Blow On a Doorbell
OBJECTIVE: To turn on a circuit
by blowing on it.
Build the circuit and turn it on, music
plays for a few moments and then
stops. Blow into the microphone (X1)
and it plays; it plays as long as you
keep blowing.
Replace the speaker (SP) with
the 6V lamp (L2). Blowing hard
into the microphone (X1) turns
off the light briefly.
Build the circuit and turn it on; music
plays. Since it is loud and annoying,
try to shut it off by blowing into the
microphone (X1). Blowing hard into
the microphone stops the music, and
then it starts again.