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Remote Control for Home Appliances
Connect this circuit to any of
your home appliances (lamp,
fan, radio, etc) to make the
appliance turn on/off from a TV, VCD
or DVD remote control. The circuit can
be activated from up to 10 metres.
The 38kHz infrared (IR) rays
generated by the remote
control are received
by IR receiver
module TSOP1738 of
the circuit. Pin 1 of
TSOP1738 is connected
to ground, pin 2 is connected
to the power
supply through resistor
R5 and the output
is taken from pin 3. The
output signal is amplified
by transistor T1
(BC558).
The amplified signal
is fed to clock pin 14 of decade
counter IC CD4017 (IC1). Pin 8 of IC1
is grounded, pin 16 is connected to Vcc
and pin 3 is connected to LED1 (red),
which glows to indicate that the appliance
is ‘off.’
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Build your own LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and "Zero Out" function to make sure the readings are as accurate as possible ... [more] |
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