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Car Electronics and Lights

Gauges, speakers, signal lights, headlamps and cabin lamps are all parts of a car’s electronic equipment. The majority of cars use a 12-volt power source, and include a fuse for protection from power surge.

2,811 Questions

What are fuses?

A fuse is a safety device that lies in series in a circuit between an electrical source and its associated load(s). When the current, or flow of electricity, exceeds its designed threshold, the fuse is calibrated to permanently open the series circuit, thereby disconnecting the load(s) from the power source. Unlike circuit breakers, which can be reset to allow current to flow again, once a fuse disconnects, it must be discarded and replaced with a new fuse.

Fuses protect a circuit from overheating due to excessive current flow. Wires and components are designed to carry up to a certain amount of current, and if the flow of current exceeds that design limit, the wire or device could overheat. Unprotected wires and electrical devices can get so hot that they can catch fire, or heat adjacent materials to their combustion point, thus starting a fire in those adjacent materials.

Modern houses are most commonly equipped with circuit breakers, not fuses, for the house wiring. Fuses are still commonly embedded in vehicles, electrical devices, and electronic components.

A fuse is usually constructed using a thin metal strip or filament encased in a protective transparent glass or plastic enclosure. Each end of this metal strip is connected to a separate terminal on the outside of the fuse, and these external terminals in turn connect to matching terminals attached to the circuit being protected. All the electrical current that flows through the circuit passes through this single strip of metal inside the fuse.

The metal strip inside the fuse is designed to overheat and melt if the current exceeds the fuse's rating. When this metal melts away, the strip is broken, and there is no longer a path permitting the current to flow, and therefore the fuse disconnects the electrical circuit. We commonly describe a fuse as being "blown", or we say the fuse "blows" when it disconnects the electrical circuit.

Fuses are available in pre-defined ratings, such as 1 Amp, 5 Amps, 15 Amps, 25 Amps, and so on, and these ratings are clearly indicated on the fuse. Many fuses are also color coded to simplify the rating identification. The transparent enclosure permits visual inspection of the metal strip or filament, so you can see if the fuse has blown.

It is important to turn off or disconnect the electrical load(s) that caused a fuse to blow, because if you leave all those electrical devices turned on, then the next fuse will also blow as soon as you replace the first one. It is also very important to replace a blown fuse with good fuse of exactly the same rating. You should never, for example, replace a 15 Amp fuse with a 25 Amp fuse, because then the wiring is no longer properly protected, and it could overheat and cause a fire.

It is important to distinguish a fuse from a Ground Fault Interrupt (GFI) safety device. A fuse will not prevent death by electrocution. Nor does a fuse protect against fire due to arc faults. The fuse's only purpose is to protect against excessive current flow in a circuit. Like it's dynamite!

Where is the turn signal flasher on a 2000 Chevy blazer?

everyone should have a manual for their vehicle, and the library should have a professional manual available...in the reference section, you'll have to make copies of the important sections...good luck :)

How do you reset check engine light on 2003 4.3 blazer?

The check engine light is illuminated for a reason. One of the engine control devices has probably ceased functioning. Take the vehicle to a shop for diagnosis, and repair of the problem.

What are the impacts of computers on environment?

I belive some computers add to the incessant increase of pollution in terms of garbage and such. However, it also has positive effects such as the innovation it brings in protecting and preserving the environment.

What is ICDP switch?

ICDP Stands For Iron Clad Double Pole. It is also known as Main Switch. It contain two fuse. One is for phase wire and another is for neutral wire.

What do you use DC electricity for?

Direct current (dc) electricity is used in many different things, including for example: digital watches and cameras, cellphones, laptop computers, mp3 players, cars, motorbikes ...

Why do you have relays?

to control a high-current circuit with a low-current signal for example a starter on a car uses a very high current (not voltage) and needs thick cable to provide it.
it would be impractical to run this thick cable up to the ignition key so a lower current from the starter key operates a switch, usually electro magnet, which in turn completes a circuit for the higher current.

How many watts can be powered by a 9 volt generator?

There is no way to answer without knowing the wattage rating of the 9 volt generator. A generator's wattage rating depends on the size of the wire in it, the wattage of the rectifiers if it is a DC generator, and the horse power of the engine or motor that is available to turn the generator.

How many amps does 1500 watts equal?

It all depends on the supply voltage. In the UK the supply voltage is 240V therefore the amps would be 1500w/240v = 6.25A. In the USA (with a supply of 110v) the amps would be 1500w/110v = 13.64A. All you need to remember is the formula 'amps = watts/voltage'

How many watts does 100 ohms equal?

Need the voltage or current of the circuit. And the type of lamp (bulb)--is it incandescent, fluorescent, LED, discharge?

Also need to know the temperature--the resistance of a tungsten filament changes by a very large amount from ambient temperature to hot/operating temperature.

What is the function of a rectifier within an alternator?

A rectifier turns the Alternating Current (AC) produced by the Alternator into Direct Current (DC) that your car uses.

What is the difference between an Inverter and a Converter?

The term converter usually refers to a DC to DC process where a higher or lower voltage is required. Even when a lower DC voltage is needed, it is sometimes more efficient to use a chopper style process rather than a voltage regulator. Converters are often used to condition dirty or highly variable sources like automotive, aircraft, and marine 12VDC systems into a very clean source of power for sensitive electronics. Many converters have very wide input voltage requirements that allow one design for a wide range of power 8-36 volts or more is not unusal. So you can operate even on almost dead batteries, or on a 24-36 V system without modification.

Inverter is a term that implies making AC from DC as in 12VDC input, 120VAC output.

This Is the correct answer:

DC (batteries) 12v to AC (house) 120v Inverter

AC (house) 120v to DC (batteries) 12v Converter

Why diode is used in rectifiers?

A Diode is a device which allows current to flow only in one direction (see forward bias).

Since a rectifier needs to convert Alternating current(bi-directional) into Direct current(uni-directional), solid-state diodes are usually used as rectifiers.

What is difference between power diode and ordinary diode?

the High voltage rated diodes are power diodes while of low rating or normal voltage rating are considered to as ordinary / normal diode

Are diodes often used as switches?

Diodes perform a different function as switches. switches allow you to control wether or ot electricity is flowing. diodes only allow power to flow in one direction. A light emitting diode may be used as an indicator for wether or not power is flowing through a circuit.

What was the first commercial electric motor?

The first commercially-successful electric motors were made around 1873 by Zenobe Gramme, a Belgian engineer. His electric generators (dynamos) were based on machines invented by Italian physicist Antonio Pacinotti in 1860.

What is the difference between a ganged potentiometer an an ordinary potentiometer?

A ganged potentiometer is two or more piggy-backed together that share a common shaft. Turn the shaft and you turn all the pots at the same time. Commonly used to adjust the volume or tone for both channels of a stereo amplifier at the same time. An ordinary pot has just one to a shaft!

What is the difference between a one diode rectifier and a two diode rectifier?

A one diode rectifier is called a half wave rectifier and only allows current flow for the positive portion of the sine wave. A two diode rectifier, or full wave rectifier allows positive current flow during the positive portion of the wave as well as positive current flow during the negative portion of the sine wave. This results in a much cleaner DC power signal. The addition of a capacitor in the output circuit will clean up the signal very nicely.

How many people in the world use GPS?

Almost 17% of Americans own a GPS device, whether in their car or on their phone or other wise. An approximate number would be around 3,065,849 people, and the number continues to climb. (Maty 2013)

What is a diode and define some applications of diodes?

It is a semiconductor device with two terminals, typically allowing the flow of current in one direction only. It may also be termed as the electronic component with two electrodes known as the anode and the cathode. Most diodes are made with semiconductor materials such as silicon, germanium, or selenium. The diode acts as a valve in the electronic and electrical circuit.

What are the topics of seminar for electrical?

Electricity is a huge subject, so the topics for any seminar will have to be based on whatever aspects of electricity are to be discussed.

Where do you find DC electric motors?

Lots of things - your car has a engine that is used as a generator (your alternator). Cell phones that vibrate have a small electric motor with an uneven weight on the rotor which causes vibration as it spins. Fans (heater, attic, computer, etc.), many different toys - remote control cars, some airplanes, etc. Electric golf carts and cars. The list goes on and on.

What can damage a diode?

yes,infact every diodes have certain limitations.The maximum value of current that can pass through it will normally be encrypted on it usually at the time of manufacture.