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Project #302
Adjustable Time Delay Lamp (II)
OBJECTIVE: To build a lamp
OBJECTIVE: To build a fan
Replace the lamp (L2) with the motor
(M1, positive (+) side up), be sure to put
on the fan. Turn on the switch and press
the press switch (S2). The fan stays on
for a while after you release the press
switch. This could have a longer delay
and be near your bed, to turn off after
you fall asleep.
Project #305
Delayed
Bedside Fan
OBJECTIVE: To build a fan
Project #304 Watch Light
OBJECTIVE: To build a lamp
Turn on the switch and press the
press switch (S2). The lamp stays on
for a few seconds after you release
the press switch.
A miniature version of a circuit like
this might be in your wristwatch -
when you press a light button on the
watch to read the time in the dark, a
light comes on but automatically
turns off after a few seconds to avoid
draining the battery.
Replace the lamp (L2) with the motor
(M1), be sure to put on the fan. Turn on
the switch and press the press switch
(S2). The fan stays on for a while after
you release the press switch. You can
change the delay time with the
adjustable resistor (RV).
Be sure to use the 6V lamp (L2) for
this circuit. Turn on the switch and
press the press switch (S2). The
lamp stays on for a few seconds after
you release the press switch. You
can change the delay time with the
adjustable resistor (RV).
Project #303
Adjustable Time
Delay Fan (II)
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