Super Low Noise Phono Preamp

Schematic

PCB Lay Out

Parts List :

Resistor :
R1 = 56 Kohm/1%
R2...R9 : 68 Kohm/1%
R1O...R11 : 4,7 Kohm/1%
R1O...R11 : 4,7 Kohm/1%
R12, R15 = 1,8 Kohm/1%
R13,R19 = 150 ohm/1%
R14 = 270 ohm/1%
R15 = 150 Kohm/1%
R16,R2O : Kohm/1%
R17 = 12 Kohm/1%

Capasitor :
C1 = 4,7 pF
C2,C3,C9, C10,C11,C13 = 4,7 uF/16 V, tantalum
C4,C6 = 3,3 nF/2%
C5,C7 = 10 nF/2%
C8 = 470 nF
C12,C14 = 1 pF/35 V, tantalum

Semikonduktor :
T1...T8,T17,T19 = BC 550C, BC 414C
T9...T15,T18,T20 = BC 560C, BC 416C
IC1 = 78L15
IC2 = 79L15


Specification :
input sensitivity (Output : 200 mV):                     2,5 mV/1 kHz
input impedance:                                                49 KQ/280 pF
Maximum input voltage (at 1 kHz):                     110 mV
Distortion Factor (Output 200 mV);
                                                   100 Hz:          < 0,001%
                                                   1 kHz:            < 0,001%
                                                   20 kHz:          < 0,001%
Over Load Distortion at +32 dB (output 8,4 V)
                                                   100 Hz:          < 0,016%
                                                   1 kHz:            <  0,01%
                                                   20 kHz:          <  0,01%
Deviation from the characteristic IEC:
                    C4...C7  with 5% tolerance:          < 10,55 dB
                                  with 2% tolerance:           < 10,25 dB
Frequency response
                     (C4...C7  at 5% tolerance):          0 Hz...40 kHz
                                                                         and 10,55 dB
Comparison of signal-noise                                > 86 dB

Lie Detector

Here is a simple lie detector that can be built in minutes, but can be incredibly useful when you want to know if someone is really telling you the truth. It is not as sophisticated as those that the pros use, but it works. It works by measuring skin resistance, which goes down when you are lying.

Parts :

R1    33K 1/4W Resistor

R2    5K Pot

R3    1.5K 1/4W Resistor

C1    1uF 16V Electrolytic Capacitor

Q1    2N3565 NPN Transistor

M1    0-1 mA Analog Meter

MISC1Case, Wire, Electrodes (See Nots)

Notes

- The electrodes can be alligator clips (although they can be painful), electrodes (like the kind they use in    hospital), or just the son and bands.

- You can use the circuit, connect the electrodes to the back of the hand subjects, approximately 1 cm intervals. Then adjust the meter reading 0 Applications. He knows the subject is lying when the meter changes.

Indor Intercom

In this circuit, intercom, an 8-ohm is used for both the microphone and output device. Phase BC109C extends a common base mode, in which case a good voltage gain, while providing a low input impedance of the speaker. Self-DC bias is used allowing increases of transistors in progress. LM386 is used in inverting mode amplifier power to increase the voltage gain and drives 8 ohm. 10k potentiometer volume control works, and the overall benefit can be adjusted using the 5k in advance. Double-pole switch, turn the position of the speakers, so you tend to speak and another to hear. Manually operate the switch (from inside the house) allows two-way communication.

Estimating Household Appliance Energy Use

If you 're trying to adjudicate whether to invest in a more energy-efficient appliance or you'd like to establish your electricity loads, you may want to estimate appliance energy consumption. So, you can use the formula below before you buy appliances. 

  

Estimating Energy Consumption Formula

This formula can be used to estimate an appliance's energy use:
(Wattage × Hours Used Per Day ÷ 1000 = Daily Kilowatt-hour (kWh) consumption
(1 kilowatt (kW) = 1,000 Watts)

Multiply this by the number of days you use the appliance during the year for the annual consumption. You can then calculate the annual cost to run an appliance by breeding the kWh each year by your local utility's rate per kWh spent.

Note : To estimate the number of hours that a refrigerator actually operates at its maximum wattage, divide the total time the refrigerator is plugged in by three. Refrigerators, although turned "on" all the time, actually cycle on and off pro re nata to maintain interior temperaturs.

Examples:

Portable fan:
(200 Watts × 4 hours/day × 120 days/year)  ÷  1000
= 96 kWh × 8.5 cents/kWh
= $8.16/year
PC and Monitor:
(120 + 150 Watts × 4 hours/day × 365 days/year)  ÷  1000
= 394 kWh × 8.5 cents/kWh
= $33.51/year

Electrical Power (Wattage)
You can usually find the electrical power of most appliances stomped on the bottom or back of the appliance, or on its nameplate. The electrical power listed is the maximum power drawn by the appliance. Since many appliances have a range of settings (for instance, the volume on a radio), the actual amount of power consumed depends on the setting used at any in one case.

f the electrical power is not listed on the appliance, you can still estimate it by finding the current draw (in amperes) and multiplying that by the voltage used by the appliance. Most appliances in the United States use 120 volts. Larger appliances, such as clothes drier and electric cooktops, use 240 volts. The amperes might be stamped on the unit in place of the wattage. If not, find a clamp-on ammeteran electrician's tool that clinches around one of the two wires on the applianceto measure the current flowing through it. You can obtain this type of ammeter in stores that sell electrical and electronic equipment. Take a reading while the device is running; this is the actual amount of current being used at that instant.

When quantifying the current drawn by a motor, note that the meter will show about threefold more current in the first second that the motor starts than when it is running smoothly.

A lot of appliances continue to draw a small amount of power when they are switched "off." These "phantom loads" come in most appliances that use electricity, such as Videocassettes recorder, televisions, stereos, computers, and kitchen appliance. Most phantom loads will increase the appliance's energy consumption a couple of watt hours. These loads can be avoided by unplugging the appliance or using a power strip and using the switch on the power strip to cut all power to the appliance. 

Distinctive Wattages of Various Appliances

Here are some examples of the range of nameplate electricals power for various home appliance :

• Aquarium = 50–1210 Watts
• Clock radio = 10
• Coffee maker = 900–1200
• Clothes washer = 350–500
• Clothes dryer = 1800–5000
• Dishwasher = 1200–2400 (using the drying feature greatly increases energy consumption)
• Dehumidifier = 785
• Electric blanket- Single/Double = 60 / 100
• Fans
  • Ceiling = 65–175
  • Window = 55–250
  • Furnace = 750
  • Whole house = 240–750
• Hair dryer = 1200–1875
• Heater (portable) = 750–1500
• Clothes iron = 1000–1800
• Microwave oven = 750–1100
• Personal computer
  • CPU - awake / asleep = 120 / 30 or less
  • Monitor - awake / asleep = 150 / 30 or less
  • Laptop = 50
• Radio (stereo) = 70–400
• Refrigerator (frost-free, 16 cubic feet) = 725
• Televisions (color)
  • 19" = 65–110
  • 27" = 113
  • 36" = 133
  • 53"-61" Projection = 170
  • Flat screen = 120
• Toaster = 800–1400
• Toaster oven = 1225
• VCR/DVD = 17–21 / 20–25
• Vacuum cleaner = 1000–1440
• Water heater (40 gallon) = 4500–5500
• Water pump (deep well) = 250–1100
• Water bed (with heater, no cover) = 120–380

Home Theater Sound With JBL SYNTHESIS

For more 60 years, HARMAN brands have set the benchmark for premium entertainment on tour, on the stage and in the home. We delight some 25 million drivers in the car, support the worlds top performing artists, and indulge the passion of home audiophiles from every generation.

Now, home theatre enthusiasts can take their listening experience to a whole new level with our JBL SYNTHESIS sound system. Designed to envelope every audience member in sonic purity, these systems deliver the absolute peak of sound reproduction. Whether youre enjoying a first-run movie or a premier sporting event, we can offer you a front-row seat that truly puts you inside the action and get delightsome hifi sound.

JBL SYNTHESIS systems are the suitable complement for todays high-definition content and gained large-screen displays. Our surround processors, digital equalizers and premium cabling deliver the faithful reproduction that you expect from todays advanced media. Add to this a range of amplifiers rated at up to 800 watts and legendary JBL speakers that blend high performance and stunning style. The result : Every refinement of the listening experience comes through with the crystal clarity and room-shaking excitement that you expect from HARMAN.

For the ultimate illustration of audio perfection, consider the latest Project Everest system. Three Project Everest DD66000 speakers sit in front of you, eight SK2-1000 surround speakers and four 18-inch S1S-EX subwoofers round out the room, powered by no fewer than eleven S820 amplifiers. These come together to make the most realistic and inspiring system JBL Synthesis has ever projected. 

It is little wonder that HARMAN is the only company to earn two prestigious GRAMMY Technical Awards for our decades of contribution to the science of audio. Our qualified channel partners can help you pick an award winning system that brings this bequest into your home. But dont just take our word for it. Hearing is trusting.
 

Home Movie Theater For Your Child's

There was a time when it was popular and affordable to take your son and all his friends to a group activity such as bowling, roller skating, or movies for her birthday party. As children grow, these activities are fun and more "mature" alternative to a birthday party at home that are used in the years they were younger, where the family gifts, birthday cake, food from best chef and pin the tail on the donkey, enough for them. Now they want a place where friends can mix and entertaining, with more than a few games.

Unfortunately, with a group of kids to the movies or bowling can be expensive. For example, in bowling you have to pay to play, to rent shoes, and for a meal and refreshments. In the cinema, tickets and popcorn and refreshments for all, you have nothing to buy his son a gift.

A middle ground is a fun film festival at home, where children can watch a movie on satellite TV. This will save much money, and there are some things you can do to make sure that everyone will have a good time.

1. Send invitations with a movie theme for all excited. You can find invitations in your local store or even online fixed. Have your child help you fill them with the details of the celebration of his birthday.

2. Have your child pick out a movie before your guests arrive. With satellite TV, which has a variety of movie channels to choose from, as well as video on demand. If it's a sports movie, action films or comedy, make sure it is appropriate for the age group.

3. Stock up on accessories and everything that will make your guests feel like they're in a movie theater.

a. Create movie tickets can be delivered to each customer as they arrive. You can be creative and write your child's name, date, how old they are turning, and the film will be shown.
b. Rent a popcorn machine for it to serve customers bags of popcorn with butter, just like they do in the theater.
c. Get your hands on the movie posters, or print from your computer, and hang around the house, especially in the room where you see the movie.
d. Arrange the chairs and sofas in rows as if in a movie theater. Turn the lights down for the movie to get the full effect of being in a theater.
e. Make the bags with candy theater movement and bags of microwave popcorn to give to children in its output. Children can enjoy these delights next time you watch a movie at home on your own satellite TV.

How To Fix No Audio Error on The PS3

You have no audio error PS3? Looking for a way to get rid of this problem so you can finally play games again with the audio? In order to successfully repair the PS3 no audio problem, you have to try a couple of methods. In total, I have two options for you and advice from 4 to solve this problem. So let's start with the first 4 tips, of course: ... 1) Try to take care unit with HDD (hard disk) and put it back on your Playstation 3 with care. 2) Restart the console. 3) Carefully plug all cables except the power cord. Once done, put them back in. 4) Check for loose cables and restart the console. If these four tips do not work, then there is a hardware issue going on ... In order to troubleshoot hardware, you have to open the console and repair the problem from within. To do this, you can only do 2 things. Fix Errors ps3 Sony Audio One thing you can do is to be send your console to Sony troubleshooting. However, note that if the guarantee is invalid, you will pay $ 150. In addition, you must wait 2-6 weeks before the whole process of shipping, handling and repair has been completed. Therefore, do not really recommend going for this option even though many people are doing this, we are definitely losing a lot of money and time. Repair PS3 no audio problem on your own While many people are saying that this is not possible unless you have expertise, this option is perfectly possible to do. Therefore, as this option is exercisable, will not have to pay $ 150 and you will not have to wait several weeks, which is impressive. However, in order to successfully repair your Playstation 3 itself, it is necessary to know what to do. Therefore it is highly recommended that you start using a PS3 repair guide. In this way, you step by step to make a readable guide that comes along with the photo, but also get high-definition video and support staff along with current guidance. Why not take a look at the best guides for the repair? Visit: PS3 Repair GuideTherefore, in order to repair the PS3 no audio error, you can do two things. You send your console to Sony, which costs $ 150 for shipping, handling and repair. It also takes 2-6 weeks before the process is complete. Or you can use a PS3 repair guide which makes you able to fix your problem without audio on ps3 without losing too much money and time. Want to start fixing your PS3 Games audio problems? Today? Visit: Playstation 3 without audio