Project on Spy Ear
CHAPTER 1
INTRODUCTION, CIRCIT DIAGRAM AND WORKING
INTRODUCTION
Spy ear is the devices which converts low power audio signal to high power signal and gain. It can be used in Theaters , Concert halls, Lecture rooms, Trains, Court houses, Conference rooms, Embassies, Gaming facilities, Recording studios, Aircraft , railways ,bus station etc.With this sound amplifier, you can now hear things crystal clear that you could never hear before. Spy ear is very easy to use, just put the ear buds in your ears - aim the Spy Ear towards what you want to hear and things are heard crystal clear. Spy Ear has adjustable volume control, which amplifies sound up to 50 decibels. Spy ear is also great for watching TV late at night, while your spouse sleeps you can keep the sound on the TV way down and still hear clearly.
In spy ear circuit the most important part which is used to amplify the ckt is An IC named LM386N, which is a low sound amplifier, it amplifies the sound which is received by the condenser mic connected in the ckt. The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 mill watts when operating from a 6 volt supply, making the LM386 ideal for battery operation.
Spy ear is widely using in the spy works. Many spy agencies, National Security Agencies using both wired and wireless spy ears to hear the private conversation and to cought any illegal person doing any illegal work.
CIRCUIT DIAGRAM
[pic]
WORKING
What binoculars do to improve your vision, this personal sound enhancer circuit does for listening. This
INTRODUCTION, CIRCIT DIAGRAM AND WORKING
INTRODUCTION
Spy ear is the devices which converts low power audio signal to high power signal and gain. It can be used in Theaters , Concert halls, Lecture rooms, Trains, Court houses, Conference rooms, Embassies, Gaming facilities, Recording studios, Aircraft , railways ,bus station etc.With this sound amplifier, you can now hear things crystal clear that you could never hear before. Spy ear is very easy to use, just put the ear buds in your ears - aim the Spy Ear towards what you want to hear and things are heard crystal clear. Spy Ear has adjustable volume control, which amplifies sound up to 50 decibels. Spy ear is also great for watching TV late at night, while your spouse sleeps you can keep the sound on the TV way down and still hear clearly.
In spy ear circuit the most important part which is used to amplify the ckt is An IC named LM386N, which is a low sound amplifier, it amplifies the sound which is received by the condenser mic connected in the ckt. The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 mill watts when operating from a 6 volt supply, making the LM386 ideal for battery operation.
Spy ear is widely using in the spy works. Many spy agencies, National Security Agencies using both wired and wireless spy ears to hear the private conversation and to cought any illegal person doing any illegal work.
CIRCUIT DIAGRAM
[pic]
WORKING
What binoculars do to improve your vision, this personal sound enhancer circuit does for listening. This