Project Topics For Electrical & Electronics
Wireless Tachometer
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
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
The transmitter circuit includes IR LED, 2N2222 NPN Silicon Transistor , 2N2907 PNP Silicon Transistor
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Phone Busy Indicator
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
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
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
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.But prevention should be taken to avoid shoking hazards.
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The circuit takes 115 V supply and gives to step up transformer. Three diodes and three capacitors are used to eliminate the ripples of AC.
Crystal Radio
This a very simple radio.Only five parts are here for the radio.
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The Stress Meter
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.
Principle :It is based on the principle that the resistance of the skin varies in accordance with your emotional states. Resistance varies inverse proportional to the stress. Ie if the stress level is high the skin offers less resistance,and if relaxed resistance is high.
This property of the skin is used to measure the stress level.The touch pads of the stress meter sense the voltage variations across the touch pads and convey the same to the circuit.The circuit is very sensitive and detects even a minute voltage variation across the touch pads.
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