Showing posts with label based. Show all posts
Showing posts with label based. Show all posts
Wednesday, November 12, 2014
IC TDA7012T Mini FM Received Based on Single FM circuit with explanation
Mini FM Received Circuit
TDA7021T chip radio receiver ambit is for carriageable radios, stereo as able-bodied as mono, area a minimum of ambit is important in agreement of baby ambit and low cost. It is absolutely accordant for applications application the low-voltage micro affability arrangement (MTS). The IC has a abundance bound bend (FLL) arrangement with an average abundance of 76 kHz. The selectivity is acquired by alive RC filters.
The alone action to be acquainted is the beating abundance of the oscillator. Interstation babble as able-bodied as babble from accepting anemic signals is bargain by a alternation aphasiac system.
Part List:
R1 = 8kΩ2
R2 = 10kΩ
R3 = 390Ω
C1,C3 = 10nF
C2,C6,C9,C16 = 100nF
C4 = 33pF
C5 = 25pF trimmer (Murata type TZB4Z250AB10R00)
C7,C10 = 1nF5
C8 = 820pF C11 = 1nF
C12 = 68pF
C13 = 220pF
C14 = 47μF 10V (Nichicon UWX1A470MCL1GB 5.5mmL chip type)
C15 = 3nF3
L1 = 36nH (4 turns 0.5mm silver-plated wire, inside diameter 4mm; length 7mm)
L2 = 1μH, SMD case 0805 (fres > 300 MHz)
IC1 = TDA7021T (SMD in SO16 case)
Tuesday, October 28, 2014
Circuit diagram BA1404 based Stereo transmitter
Using BA1404 can be designed a very simple and useful stereo fm stereo modulator electronic project . This BA1404 fm stereo modulator device works in FM broadcast band ( 75- 108MHz) and require few external common components .
The BA1404 fm stereo modulator Ic contains all parts needed to design an simple high efficiency stereo transmitter circuit , it contains a stereo modulator that creates stereo composites signals ,an FM modulator that creates FM signals and a RF amplifier .
The fm stereo transmitter develops composite signals made up of a main(L+R) signal and sub(L-R) signal and a pilot (19KHz) signal using a 38KHz crystal oscillators.
The RF amplifier transmits the stereo encoded signals and is also a buffer for FM modulator .
For this FM stereo transmitter circuit you’ll need a DC power supply that can provide an output voltage between 1.5 an 3 volts . This fm stereo transmitter circuit project can be used for FM stereo transmitters or wireless microphone circuits .
The L1 coil must have 3 turns of 0.5mm wire on a 5 mm core .
![]( "BA1404")
Antenna used in this transmitter can be an common telescopic antenna or a 60-80 mm long Cu wire .
The BA1404 fm stereo modulator Ic contains all parts needed to design an simple high efficiency stereo transmitter circuit , it contains a stereo modulator that creates stereo composites signals ,an FM modulator that creates FM signals and a RF amplifier .
The fm stereo transmitter develops composite signals made up of a main(L+R) signal and sub(L-R) signal and a pilot (19KHz) signal using a 38KHz crystal oscillators.
The RF amplifier transmits the stereo encoded signals and is also a buffer for FM modulator .
For this FM stereo transmitter circuit you’ll need a DC power supply that can provide an output voltage between 1.5 an 3 volts . This fm stereo transmitter circuit project can be used for FM stereo transmitters or wireless microphone circuits .
The L1 coil must have 3 turns of 0.5mm wire on a 5 mm core .
Tuesday, October 14, 2014
PIC Prototyping board 18F2550 – USB enabled
That’s a very nice PIC Prototyping board based on 18F2550 USB enabled microcontroller. Author writes:
“The board features a USB port that can be used with a bootloader for easy programming. Five analog inputs are brought out (AN0-AN4) which can be used to read analog sensors, as well as the two CCP ports which can be used to control servos or other devices. A user LED is built in, using RA4. The onboard USART ports are brought out to a three pin header which can be used to talk to other microcontrollers, or to an RS232 device with a MAX232 level converter. The whole of PORTB is brought out to a header, as well as a pair of power headers. An ICSP header rounds out the board for programming the PIC.”
PIC Prototyping board 18F2550 – USB enabled
Sunday, September 7, 2014
How to apply asphalt based sound deadening material to your car
This guide covers the basic method for applying this peel-and stick material and then tell you how, where and why to apply it.
The application of sound deadening material to your car is a very effective way to make your driving experience more comfortable. It will serve to keep out road and engine noise and keep the sound from your stereo inside the car. Asphalt based sound deadening generally comes in peel-and stick panels. This guide covers the basic method for applying this peel-and stick material and then tell you how, where and why to apply it.![]()
Applying asphalt-based sound deadener is actually quite simple. Begin by removing any interior trim panels so that you have unobstructed access to the bare metal panels that you will be applying the material to. Before you do anything else, clean the surface well using an alcohol based cleaning product that will not leave a residue. Then, start by forming the material to the contours of the surface before you remove the adhesive backing. Using a heat gun or a high-powered hair dryer, heat the material and press it into the grooves of the metal until you are satisfied that it is in full contact with the floor. This is also a good time to trim the piece to fit and cut holes for any bolts or hardware that you may need access to. Allow the piece to cool, then pick it up and remove the adhesive backing. Line it up with the contours, then place it down gently. At this point do not try to adhere the whole piece at once. Instead, use a narrow roller to work from one side to the other, pressing the piece down into every contour. It may help to use the heat gun during this process. Any air bubbles after the piece is fully adhered should be poked through with a sharp blade, and then rolled out for maximum contact. If you need extra deadening, you can layer the material as many times as space will allow.
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Trunk: If you have a subwoofer in your car, it is especially important to apply sound-deadening in the trunk. If you do it right, it will prevent annoying rattles and keep the sound pressure level from the sub from escaping through the trunk. Many manufacturers sell kits that contain a good amount of material for covering your trunk.
You should begin the application in the spare tire well and on the metal floor of the trunk. Work from one side to the other to avoid overlapping, and be sure not to cover up any hardware that will be necessary to secure the spare tire or the cargo floor. When you have finished the floor, peel back the carpet on the sides of the trunk and apply material there. If there are holes cut in the metal, you should cover these up if you do not think you will need access to them in the future. For the trunk lid or hatchback door, remove the panels to gain access to the metal inside. Apply liberally here, as sound tends to rise, but be sure that the extra weight of the material will not counteract the shocks that hold the trunk lid open.
Doors: Sound deadening the doors of almost any car will result in a noticeable improvement in sound levels, especially if your front speakers are located in the door. Not only does most of the road noise come in through the door, but the flimsy sheet metal of the door also acts as a poor acoustic surface, creating distortion in the sound of your stereo.
To counteract this, apply sound deadening to the metal inner skin of the door. You don’t necessarily have to cover everything, but be sure to get the holes and the thinnest parts of the sheet metal. The most important part of the door panels is the area surrounding the speaker. If you have enough clearance from the interior panel, apply a few layers here.
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Floor: Applying a sound deadening material to the floor of your car will probably not help make your music any louder; however it will significantly reduce road noise and allow you to hear music and people in your car more clearly.
If you are going to deaden the floor, buy enough material to cover the entire metal. This is an involved process, since you probably should take out your seats and carpet in order to gain access to the whole area. The areas to focus on here are the fenders and the surrounding metal since most of the noise comes from the tires. While you’re doing the floor, it is a good idea to apply material to the engine firewall as well. This will reduce engine noise in the cabin.
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The application of sound deadening material to your car is a very effective way to make your driving experience more comfortable. It will serve to keep out road and engine noise and keep the sound from your stereo inside the car. Asphalt based sound deadening generally comes in peel-and stick panels. This guide covers the basic method for applying this peel-and stick material and then tell you how, where and why to apply it.
Applying asphalt-based sound deadener is actually quite simple. Begin by removing any interior trim panels so that you have unobstructed access to the bare metal panels that you will be applying the material to. Before you do anything else, clean the surface well using an alcohol based cleaning product that will not leave a residue. Then, start by forming the material to the contours of the surface before you remove the adhesive backing. Using a heat gun or a high-powered hair dryer, heat the material and press it into the grooves of the metal until you are satisfied that it is in full contact with the floor. This is also a good time to trim the piece to fit and cut holes for any bolts or hardware that you may need access to. Allow the piece to cool, then pick it up and remove the adhesive backing. Line it up with the contours, then place it down gently. At this point do not try to adhere the whole piece at once. Instead, use a narrow roller to work from one side to the other, pressing the piece down into every contour. It may help to use the heat gun during this process. Any air bubbles after the piece is fully adhered should be poked through with a sharp blade, and then rolled out for maximum contact. If you need extra deadening, you can layer the material as many times as space will allow.
Trunk: If you have a subwoofer in your car, it is especially important to apply sound-deadening in the trunk. If you do it right, it will prevent annoying rattles and keep the sound pressure level from the sub from escaping through the trunk. Many manufacturers sell kits that contain a good amount of material for covering your trunk.
You should begin the application in the spare tire well and on the metal floor of the trunk. Work from one side to the other to avoid overlapping, and be sure not to cover up any hardware that will be necessary to secure the spare tire or the cargo floor. When you have finished the floor, peel back the carpet on the sides of the trunk and apply material there. If there are holes cut in the metal, you should cover these up if you do not think you will need access to them in the future. For the trunk lid or hatchback door, remove the panels to gain access to the metal inside. Apply liberally here, as sound tends to rise, but be sure that the extra weight of the material will not counteract the shocks that hold the trunk lid open.
Doors: Sound deadening the doors of almost any car will result in a noticeable improvement in sound levels, especially if your front speakers are located in the door. Not only does most of the road noise come in through the door, but the flimsy sheet metal of the door also acts as a poor acoustic surface, creating distortion in the sound of your stereo.
To counteract this, apply sound deadening to the metal inner skin of the door. You don’t necessarily have to cover everything, but be sure to get the holes and the thinnest parts of the sheet metal. The most important part of the door panels is the area surrounding the speaker. If you have enough clearance from the interior panel, apply a few layers here.
Floor: Applying a sound deadening material to the floor of your car will probably not help make your music any louder; however it will significantly reduce road noise and allow you to hear music and people in your car more clearly.
If you are going to deaden the floor, buy enough material to cover the entire metal. This is an involved process, since you probably should take out your seats and carpet in order to gain access to the whole area. The areas to focus on here are the fenders and the surrounding metal since most of the noise comes from the tires. While you’re doing the floor, it is a good idea to apply material to the engine firewall as well. This will reduce engine noise in the cabin.
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