Project #290, Music amplifier project #291 delayed action lamp, Delayed action fan – Elenco Projects 102-305 User Manual
Page 70: Project #292
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Project #290
OBJECTIVE: To amplify sounds from the music integrated
circuit.
Build the circuit and turn on the slide switch (S1). You will hear loud
music, since the sound from the music IC (U1) is amplified by the
power amplifier IC (U4). All radios and stereos use a power amplifier.
Music Amplifier
Project #291
Delayed Action Lamp
OBJECTIVE:
To build a lamp that
stays on for a while.
OBJECTIVE:
To build a fan
that stays on for a while.
Replace the lamp (L1) with the
motor (M1), positive (+) side up.
Be sure to put on the fan. Turn on
the slide switch (S1) and press
the press switch (S2). The fan
turns on slowly but stays on for a
while after you release the press
switch.
Turn on the slide switch (S1) and
press the press switch (S2). The
lamps (L1 & L2) turn on slowly, but
stay on for a while after you release
the press switch.
Project #292
Delayed
Action Fan
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