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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 long to charge a 12 volt battery at 2 amps?

It takes between 8 and 12 hours to charge a 12 volt battery at 2 amps. The actual time will depending on how much charge is in the battery initially.

How do you set the time on the clock in a 1989 Chevy prism?

Setting the time on the Chevy Prizm is tricky. The Prizm's manual says to change the clock using two buttons labeled HR and MN -- presumably for HOUR and MINUTE. Unfortunately, these two buttons are not identified in the manual and are not labeled on the radio. The two HOUR and MINUTE buttons are the two buttons located at the lower right of the radio control panel. These two buttons are labeled with DOWN and UP arrows. ---------------------- To change the MINUTES: ---------------------- Push and hold the UP ARROW button for a couple of seconds. The minutes on the clock will begin to increment slowly. Keep holding down the button until the correct minute is reached. When the minutes reach 59 they wrap around to 0 and then keep on incrementing. ---------------------- To change the HOURS: ---------------------- Push and hold the DOWN ARROW button for a couple of seconds. The hours on the clock will begin to increment slowly. Keep holding down the button until the correct hour is reached. When the hours reach 12 they wrap around to 1 and then keep on incrementing. ---------------------- TIPS ---------------------- TIP: you don't have to turn on the car to change the time. TIP: once you get close to your desired hour or minute, you can stop holding down the button, and instead, start pressing it repeatedly. This gives you more control over setting the hour or minute, and it helps you avoid going past your desired time. TIP: when you go past the time you want, it is tempting to press the down arrow to go back. This doesn't work. The DOWN arrow only increases the hour and the UP arrow only increases the minute. You have to continue pressing the hour or minute button until the hour or minute wraps all the way around and comes back to the time you want.

Which is better to use class A or class B?

For public addresses, you use whatever is assigned to you. You probably won't be able to find available class A or class B networks, so you will use a class C network, or part of it. Soon you won't be able to get that, either (time to switch to IPv6).

For a private network, a class A network - 10.0.0.0 /8 - gives you the greatest flexibility, because of the larger address space.

How many pcs can be connecte to a UPS?

The limit does not depend on the actual number of PC's that can be connected to a UPS. The limit is based on the total power consumption required by the PCs and the power supply rating of the UPS device.

You can add the power consumption of all the PCs based on the number of watts (or amps) listed on a label on the back or side of each PC and compare it to the maximum load specified for the UPS unit.

When powering an op-amp from a single voltage source should vss- and common ground be connected?

It depends on what you're trying to do. If you need a comparator or a trigger, then, no. If you're using it for audio or some other type of AC signal, then you need to set up a 1/2 vcc. reference to allow the op-amp to swing from plus and negative voltages.

Since the op-amp is a voltage controlled device, you can use a coupe of resistors in series, one from the plus rail and one from the negative rail, connecting the "ground" reference to the junction of the two. Just about any value will work as long as they're matched values. Try using a couple of 100 k. resistors or you can even go up to 470 k, if you really want to keep the current limited.

Bear in mind though that there are applications where offsets are needed, but without knowing your particular applications' requirements, there's not a lot of advice I can give you.

The overall force acting on an object after all the forces are combined is the?

After all forces are summed with vector addition, the result is usually known as the net force (Fn) and can be used in the formula (Fn = ma).

How many television show is are there?

There is are 120,320 shows in the United States. Worldwide, there are is a total of 2,102,494 shows!

How do you set alarm on a cardinal watch?

Press the mode button until alarm function shows

now press and holdthe set button until hour flashes

now press adjust to set th hour

press the mode buton to move to the minutes

press adj to set minutes

press set to close

Why values of modulation index greater than one are not used in full-carrier AM system?

If the modulation index is greater than 1 (more than 100% modulation) the modulated carrier signal is periodically reduced to zero. This does not effect the transmitter but at the receiver these "dead carrier" intervals result in dropouts in the audio stream from the loudspeaker producing a distorted output that is difficult to understand.

Does the Latin term for buyer beware imply that the buyer educate himself on the product for purchase?

`Caveat emptor`, or, `Let the buyer beware` usually refers to the actual business deal itself. Is the person doing the selling telling you the truth, or is it being embellished? Is what he says the same as what the contract says, regardless of interpretation by the seller? What's in the `fine print` section and most importantly, is anything being hidden from you by omission?

Of course, you should educate yourself on the product(s) of interest. The more you know, the less likely you'll have the wool pulled over your eyes.

It also helps you to determine the knowledge and integrity of the sales person.

ALWAYS as questions in your negotiations. There's not such thing as a `stupid question` but there are things like `stupid answers`. Learn as much as you're able, to be able to know the difference.

And if you hear a little voice in your head saying, `Something's wrong here`, chances are, it is. Run, don't walk, but RUN to another dealer or someone that has the same products for offer and at least, check them out before you make your decision.

Just some advice, but it could save you some big mistakes down the road.

Who invented the black light?

Nobody. The black light is a trivial name for ultraviolet radiation which human eyes don't respond to. (shorter wavelenght than blue)

What is value of astrocom reel to reel player model 407?

idk but u have to go to heyxd.com it is soooo kewl! u can talk to ur friends and play games and create smiles and pix!! best of all its totally safe!!

What is MTU in ps3 network?

MTU (Maximum Transmission Unit) is basically the max amount of bytes allowed per packet that your router can handle.

If it is set too high you will not be able to receive any information online through your connection.

If it is set too low you will receive information online at a less than optimal rate.

So basically: If your MTU is lower than the highest it can go, you will have a slower internet connection overall.

I will explain it even simpler terms just to make sure this was not a waste of time on my part:

You have 3 trains making trips from Boston to New York.

Train 1 is loaded with so much stuff that it cannot hold any more. It tries to make the trip but cannot because its bogged down.

(This is if you have too high MTU.)

Train 2 has the most it can carry without bogging down and hindering the train, it goes the fastest it can and carries the most it can without slowing down.

(This is optimal MTU setting.)

Train 3 on the otherhand has been underloaded with the least amount of stuff, it makes the trips at the same speed as Train 2 but is carrying less goods and overall has a less efficient trip.

(This is a low MTU setting. It will work, but you will get less information at the same speed as optimal. You do not want this, because overall it will slow you down. Just like how train 3 would have slowed down the effeciency of goods travelled, by carrying less goods per trip.)

You want optimal. If you want optimal, determine through DOS on your computer,

(to get into DOS go into start menu, run, then type command and hit enter)

is by pinging www.google.com with this command:

ping www dot google dot com -f -l XXXX

XXXX = a number from 1000 to 1999 or higher.

If you are too high, you will notice none of the "pings" are being received. This means your router cannot handle the packet size. So go lower, and keep going lower until you find the highest number that it will let you use. This is your optimal MTU.

Right now I am trying to optimize my PS3 the same as you might have been, and this might be helpful to others.

(I suggest you try 1492 as your first # to see if it is the optimal rate, in many cases it is.)

What is the most commonly used type of battery for example AA AAA D etc.?

Just recently watched a video on batteries. Apparently, the `D' battery is the most used, followed by the `AA'.

How do you reset phase linear uv7i?

Press the RESET button located in the bottom right corner of the front panel