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Consumer Electronics

Ask questions here about the electronics you use every day: from phones and computers to kitchen appliances and radios.

4,952 Questions

How do electronic video projectors project black?

Black is considered as the `absence of light', or the complete absorption of the visible spectrum, from which no light reflects.

In video projectors, the light is completely blocked from reaching the screen, creating the same effect. It appears to be black because you're usually watching it in a darkened room and in relation to the brighter areas on the screen, your mind perceives it as being black. In reality, if you were to look at the screen, you'd still see that there's no light hitting it to reflect back to your ryrs from the screen.

Can you use a 12 volt battery with a 48 Volt inverter?

Using a 48 volt inverter on a 12 volt battery almost certainly won't work. In all likelihood, the inverter won't even try to "come up" and drive a load. Let's look at inverters and then figure out what's up. An inverter (in the "usual" sense) converts some fixed DC voltage to an AC voltage which, though it doesn't have exactly the same wave shape as the stuff coming out of a wall outlet, approximates it well enough in voltage and wave form to run, say, a blender out on a tailgate party somewhere. (That would be a 12 volt inverter with appropriate wattage and plugged into the car's lighter plug. Something like that.) The electronics takes the DC voltage and runs it through a "switch" or "chopper" to turn it on and off. The semiconductor device which does this has converted the DC to AC (but not exactly to an AC sine wave like on the power grid). The "chopped" AC is stepped up through a transformer and the appropriate output voltage is thus generated. A bit of "wave shaping" is accomplished along the way, and final result is something that can pass for "household" power and drive that blender for the tailgater we mentioned. So we have an inverter powering up an AC appliance. It's got appropriate wattage to drive the thing. But we're running off a battery. What happens when the battery starts to run out of "juice" while we're working with the blender? Well, as the stored energy drains down, the output voltage of the battery will sag or fall off. And at some point the inverter, because of the electronics package that controls it and what it is set up to do, will decide that the input voltage is "too low" and it will shut down the inverter. It's a design consideration that most inverters share. How does that affect our problem? Read on. Try to drive a 48 volt inverter with a 12 volt source and it's unlikely the inverter will even power up because the electronics control circuits will nix the drive to the switch as a "safety" consideration. You're dead in the water. That's arguably the most correct answer. But there is a ray of hope. Several, actually. Suppliers of the 48 volt inverter would be the solar power industry, the so-called "survival" supply industry, the golf car or electric vehicle industry or possibly the RV industry. Suppliers commonly vend inverters in 12, 24, 36 and 48 volt flavors. If you have a 48 volt inverter and want a 12 volt one, call a nearby company of one (or more) type and see if they'll make a trade. Odds are that they'd be happy to talk to you. Ask about an inverter that was a demo or one that was pulled from a system that was upgraded (and has been tested and deemed "good" by the shop). The bigger outfits usually have something in the "standby" or "backup" equipment locker. Run with those options and see what you can work out. Your inns of last resort may be eBay or Craig's list. As always, good luck with your project.

What is an atomic watch?

A watch that is updated automatically from an outside source (usually satellite or signal from a central hub).

What kind of clothes do 13 year old s wear in the 2000?

Vintage tees and skinny jeans are in with most girls. Some guys wear skinny jeans too.
Bright denim skinny jeans are popular too. Here are some popular brands and stores among Teenagers and young adults.

American Eagle
Areopostle
Abercrombie
Ralph Lauren
Polo
Wet Seal
and many others

Most of these stores and brands have higher prices.

What is the efficiency of a TV?

Flat screens are very efficient however older televisions (box ones) are not efficient at all.

What is the power range in BTU of a car air conditioner?

10k btu "cars "to 25k btu "semi's" depending of vehicle size.

Answer 2: For an Acura Integra 98 it's 14,2k BTU/h. And it's a small car.

Source: Acura service manual.

How do you send optus credit?

http://au.answers.yahoo.com/question/index?qid=20080721052122AAP5LiN

How do you download songs that you put in tunes from a CD to your 2gb pod?

hmmm have you installed all software re. to your pod you can send files via a usb wire to the pod, by using wmedia player or similar. read the instr. manual of the pod to see desc. procedure or search web. If you have "windows" you might have a media player which you would download the songs to the computer then transfer the songs off the computer by hooking your Ipod to the computer with a USB cable

Is Tamoxifen helpful for those with severe mania?

yes tamoxifen is helpfull with extreme mania

http://www.nimh.nih.gov/science-news/2007/manic-phase-of-bipolar-disorder-benefits-from-breast-cancer-medication.shtml

Where is a fuse located in a flashlight?

I have never seen a flashlight with a fuse.

UK residents would call a flashlight a torch.

How do you unlock keypad on Motorola DynaTAC 8000M?

All DynaTAC phones get unlocked with a 3-digit code. When the "Loc'd" screen shows, push in the 3-digit code and it will unlock. If the phone doesn't immediately unlock after pressing in the code, push "CLR" and try another one. Make sure to push "CLR" after every failed attempt.

I accidentally locked one one time (By pressing FCN+5. Never push that combination!) but happened to have the original box with the original phone number written on it. The last 3 digits of the phone number was the unlock code. I would try that first. If not, try 000 and 123.

If none of those work just start punching in all the possible combos from 000 to 999. Just 000, CLR, 001, CLR, 002, CLR etc. 'till you get to 999. There are only 1,000 combinations so you WILL get the phone unlocked eventually. It might take a few hours of tedious work but it WILL come unlocked with some 3-digit combo.

Good luck! --Max

Write a note on modem?

modem

Modem stands for modulation and demodulation. Modem is device that converts digital signal into analog and analog signal into digital. Modem sends and received data from one computer to another through telephone lines. The sending and receiving computers both must have modems.

The process of converting digital signal into analog signal is called modulation computer store data in digital form. Since a modem transmits data using telephone lines. So it is converted from digital to analog from.

The process of converting analog signal into digital signal is called demodulation. The modem on receiving computer receives data in analog form. The incoming analog data id converted back into digital format to be used by computer.

Features of Modem

Some important features of modem are as follows:

1. Speed: speed is the rate at which the modem can send data in bps. Typically modem speeds are 300 bps to 56bps.

2. Self- Testing: Modem can teat the digital connection with computer. It can also test analog connection with remote modem.

3. Voice over Data: Modem provides the facility of voice conversation while data is being transmitted. Both the source and destination modems should have this feature.

4. Error Control: Modem use different methods to control errors for transmitted data.

Different types of modems :

Different types of modems in terms of physical size and shape are as follows:

External Modem

External modem is attached to the system unit as an external device through telephone line. It is connected to the telephone wall jack by another cable. External modem is connected to computer using serial cable to COM1 or COM2 port. It requires external power supply. It is easy to setup. External modem is expensive.

Internal Modem

Internal modem is a circuit board that is inserted into an expansion slot on the motherboard. Internal modem cannot be moved from one computer to anther easily. It is difficult to setup than other types of modem. It is less expensive than external modem.

Wireless Modem

Wireless modem transmits the data signals through air instead of cable. It also known as radio-frequency modem. It is designed to work with cellular technology and wireless local area networks.

A disadvantage of using a synthetic detergent?

Major Disadvantage of synthetic detergents are that they are non bio degradable and thus they cause water pollution.

The Panic of 1893 was brought about by two primary reasons What were they?

There were a number of causes for the Panic of 1893. Two, however, stand out. First, a wheat crop failure and a coup (both in Argentina) caused investors to make a run of the US Treasury for gold. Second, railroad speculation and overbuilding caused runs on regular banks, especially as the price of silver fell due to the flooding of the market with silver from new mines.

What is the meaning of PMPO and RMS?

PMPO = Peak Music Power Output

RMS = Root Mean Square

Those terms describe, in two different ways, the power output capability of an electrical device such as a music player or an amplifier.

Both refer to electrical power. Remember that AC is alternating current; the voltage and current changes over time (many times per second). Now, RMS literally means "root mean square"; it is a kind of average power. This is the actual power output of an equipment.

PMPO is a figure that is inflated, to get higher figures for audio equipment - for advertising purposes. It is not standardized, and different manufacturers can use different definitions - often definitions that are not published. The PMPO power is usually many times higher than the real (RMS) power, so that you have the ridiculous situation that an equipment uses 50 watts, and has an output of several 100 watts, for example. (Not possible with actual power, due to conservation of energy.)

Will laserjet paper work in inkjet printers?

Usually, since most printers like the ones you mentioned just use ordinary copy paper. The inkjet and laserjet are just two different names for the same thing by different manufacturers. SilverSong: I disagree, I know that if you put inkjet paper in a laserjet you can ruin your laserjet heads because they specifically require special laserjet paper. Now if you own an inkjet and you want to save some money, you can buy laser jet paper and feed it through your inkjet. It'll work and it won't ruin your inkjet printer. It's a great way to save $4.00 per sheaf if you use a lot of paper. But, it should be noted this only works for regular paper, I have no expertise on doing the same with specialty papers like glow in the dark, metallics, or some of the other more fancy paper films out there.

Why you consider 230 volts not 250 or 300?

In order to give your questions a fair chance at being answered, they should really be written in English.

You might be able to find a better answer for this one over on the bizarro forums, but I'll give it a shot:

The 230>pi function was, in South Africa, not 200 or, such as, 300, in the Iraq.

What do you do if your cell phone hangs?

The only thing you can do is pull the battery and restart it. Call your provider and tell them about it. They may have a firmware update for you, or may want the details to get the problem fixed.

How do you load paper in a verifone credit card machine?

I had the same problem yesterday on a credit card yesterday. I think it is the 3200, I am home so I cannot look at the machine. You do not have to feed it through a hole; simply replace the orange spindle in the new credit card roll, drop it in, leave a little paper outside, shut the cover, and hit the advance button on the left. Tear off the extra and you should be ready to go.

If the receipts come out blank, you've put the paper in backwards.