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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
Can magnetic card reader resert the pin code inside the card?
Pin numbers are not stored in the magnetic stripe on cards. This would make it too easy for thieves to use a code reader to get your pin. The pin is stored on the banks computer.
Can rechargeable batteries be charged by a car battery charger?
It's a good idea to avoid charging any battery with a charger that was not designed specifically for that kind of battery. A car (vehicle) charger is generally designed to recharge 12 volt lead acid batteries. (The actual voltage of the battery and charge is a bit higher than 12 volts.) Rechargable battery packs come in different voltages, and many if not most are not lead acid types. A lot are nickel-cadmium or lithium types, and they need a "controlled charge" that a vehicular battery charger will not be able to provide. And that's setting aside the issue of the voltages of the battery and the charger, which is critical.
It's a bad idea to attempt to recharge a battery with a charger that is not designed to recharge that "flavor" of energy storage device.
How do you hook up a DVR when you have a satellite TV box?
The following procedure may vary, depending on if you have Dish Network or DirecTv. Connect one or two tuners to the "satallite in" on your DVR. Two is necessary in order to record two shows at once. Then, if you are working with standard definition, connect a yellow composite cable as well as two RCA audio cables to the TV and DVR. If you are working with High Definition, connect a set of component cables (blue, green, red) as well as two RCA audio cables to the DVR and TV. Also, you can connect an HDMI cable to the TV and DVR, which allows for HD video and audio to your tv with one cable. For more info on these cables and what they do, go into your local electronics store. Hope this helps and good luck!
What do the i and o mean on electronics?
I means ON
O means OFF
OR
Input/Output The I/O refers to data transmission within a buss between peripheral devices. It has absolutely nothing to do with machine language. It is also one of the three main processes essential for computers.
Why transfer characteristics cannot be obtained for a bridge rectifier?
Its because one of the diode gets shorted.The diode in the left lower arm in a bridge rectifier gets shorted by the ground points of both the cro and the function generator.
What are two ways electric circuits can be arranged?
Electric circuits with 2 terminals can be arranged in "series" or in "parallel". This applies to all 2-terminal circuits - including fundamental components such as resistors, capacitors, or inductors.
The term "series" means that an electrical path in an existing circuit is broken and the circuit is connected to the 2 terminals of the break.
The term "parallel" means that the electric circuit is connected between 2 existing terminals or nodes of the existing circuit.
How to Connect CRO to computer?
The CRO can be interfaced to the Computer in many ways. 1. GPIB network:A NI-PCI-GPIB card is inseted in any PC slot of computer and it is interconnected to the CRO GPIB port.The CRO control and measurements can be performed using LabVIEW. 2.Now a days Computer inbuilt CRO's are available in the market form Tektronix ,Agilent etc. 3.You can interface CRO to the computer through LAN, using necessary drivers etc. Regards Ranga
What are start and run windings of a motor?
Start winding determines the direction of rotation.
Start windings are considered "secondary windings" and run windings "primary". Usually, the start windings disconnect from the power circuit and dry film capacitor(s) at about 75% of the motors full speed. There are some motors with oil filled capacitors that keep the secondary "start" windings in the power circuit but only disconnect the dry film caps. The primary "run" windings are always in the power circuit. There are more, could write a couple of pages on the whole workings.
What is the definition of electronics engineering?
electronics engineering is the branch of engineering which deals with the flow of current in a semiconductor devices/components.
Semiconductor devices/components are those element which made from semiconductors like silicon germanium GaAs and other material.
they are widely using in current generation.
Why cant you use visible light to see molecules?
because light used to see an object must have a wavelength
Who invented the gattling gun?
The Gatling gun (with one T) was invented by Richard Gatling, for whom it is named.
Can you use any usb mains charger to charge your flip mino hd camera?
If the mains charger is not broken it will work as good as a computer usb port, all they do is supply 5V to the battery charging circuitry inside your camera.
Its A Candelabra base bulb :-)
However, one can find "medium" sized base bulbs marked "Type B."
What does the current that flows in an electric circuit carry?
Click on the link below for more information.
Why Singapore hasn not started using hydroelectric?
A: Maybe because the country is flat. Must have some kind water pressure or velocity to get hydro working
Who now controls the Internet?
The internet is not controled by any one party. The internet itself is a vast combination of networks. There is no centralized hub for the internet. The closest parties for "control" of the internet would be the service providers, who control the hubs that connect large regions to the rest of the world, and countries who can put laws on internet use and service.
What size resistor is needed to allow a 220 volt coil in a relay operate on 277 volts?
You will need to know the amount of current flowing through the coil when 220 volts is applied across it. A resistor in series with the coil will limit the current so that the coil only sees 220 volts. The resistor will need to drop 57 volts. So, 57 volts divided by the current in amps will give you your required resistance. You will need a resistor with a high power dissipation rating with 57 volts across it. Your resistor will probaly need to dissipate several watts. For example: A 220 volt coil with 300 milliamps (.3 amps) will require a resistor of 733 ohms. The power dissipation of the resistor would need to be 17.1 Watts! You might try using a light bulb as a series resistor. Ensure that it can handle 57 volts. To complicate matters, is that AC or DC you are using? AC relays have inductance build in, in order to increase the specific "ac resistance", thus the same coil could use as little as 0,001A so you will need a very low value resistor. Anyway, if any 220V relay uses as much as 300mA, I doubt if you will be able to pick it up with one hand! Such a relay coil will draw about 66W of power! I have a 16A rated contact 230V relay. Its current is 0,0015A that is equivelant to 0.33W at 220V!
Would voltage in a three phase supply change if neutral wire is disconnected?
No, The voltage will not change. The neutral is basically a ground and is used in conjunction with the phases to create another voltage and act as the return line in an electrical system. "Depending on the system that you have". If you have a 480 volt and used a neutral with it you would have 240 or 277 volt. The 277 volt is what is normally used in office lighting. If you have a 208 or 240 three phase system using a neutral you end up with the 120 volts that is used for just about all normal lighting, receptacles and general use devices used everyday.
Additional Answer
While the supply voltage wouldn't change, the voltage across each phase of an unbalanced load may change if that load is unbalanced.
