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Wireless
Tachometer
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Tachometer is used to find out the rpm of the
motors. You can make your own tachometer here
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Laser Transmitter Plus
Receiver
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Transmitter
is a laser tube connected to high voltage supply. The message to
be transmitted is supplied to Audio in side with resistance of the coil
8ohm.The other side coil has resistance 2000ohm.
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Infrared Remote Control
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The
transmitter circuit includes IR LED, 2N2222 NPN Silicon Transistor
, 2N2907 PNP Silicon Transistor
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Phone Busy Indicator
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Have
you ever been using the modem or fax and someone else picks up the
phone, breaking the connection? Well, this simple circuit should put an
end to that. It signals that the phone is in use by lighting a red LED
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Parrel Port Interface
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The
main components are 74LS367 Buffer IC and Case, Wire, Sockests, 18
Pin Socket (For Output), 25 Pin Connector (For Parallel Port), Ribben
Cable
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FM Transmitter
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The
main components are microphone, antenna, 2N2222A NPN Transistor. The
range of the transmitter when running at 9V is about 300 feet
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Lazer Power Supply
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Lazer
works in high voltage supply.How can we make high voltage out of 220/110
V AC.Here gives the circuit. You can use this to make high voltage
supply
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Crystal Radio
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This
a very simple radio.Only five parts are here for the radio
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The Stress Meter
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This
Stress meter allows you access your emotional pain.If the stress is very
high,it gives visual indication through LED display along with a warning
beep.
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