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Electronics Engineering

Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.

24,372 Questions

Where is the Amplifier?

If you mean the Ignition Amplifier - it's a small rectangular Electronic part attached to the inner wing behind the battery - Bosch Part - about �50 to replace, they seem to go wrong at around 10/14 years - easy plug in replacement but use the heat sink conducting paste supplied with a new unit If you didn't mean the Ignition Amplifier - well - ignore all I've said.

What is the part called that opens the hatchback on a 1999 Toyota Sienna?

rear hatch outer handle, or if the part your'e talking about is inside the door its called a rear hatch doorlatch...hey it rhymes!

Where is the heat sensor or thermo switch for a 92 tempo cooling fan?

This switch is the top one around the thermostat housing, If you look down beside the air filter, right beside the rad hose, on 2.3 l engine, there it is. You can unplug the wire and put a paper clip into the plug to ground out the 2 wires, fan will come on, if the fan does not come on, then look elsewhere for you problem. Check the plug near the fan.

What is the current value of a good conditioned Springfield 67F 20 gauge?

I just bought one through a friend that was marked $199.95 on the gun shop shelf, but I got it for 25% off of that.

Why does the AC work when driving but drops when idling on a 1986 Suzuki Samuari in which you installed a 1995 Suzuki Sidekick 1.6 a6V?

The fact that the engine was replaced should not be an issue. Here is my assesment based on your question; either the ac system has a smaller capacity (smaller compressor, condenser, receiver dryer), and for that reason while driving you get a higher flow of freon thru the system compared to engine at idle, or there may be some debris in the system causing a restriction, not allowing enough flow of freon thru the evaporator. Once again, if you are driving, the compressor will spin at a faster rate and therefore provide more flow of freon thru the evaporator, therefore the cooler air.

It is also possible the pulley on either the crank or on the compressor is the incorrect size.

Where is the tachometer signal source on a Peugeot 106 1.1 spi model?

not 100% sure, but i think its the grey wire on the loom going to the ecu. Im trying to figure it out mysefl if anyone else has any tips?

How many amps should an 18-volt circular saw draw if you want it to have equal power to a corded saw?

It is not possible to answer the question with any specificity because of a lack of info, but perhaps the following will get you on the right track. Electric motors -- on pool filters, vacuum cleaners, drills, saws, whatever -- can be rated in either amps (A) or horsepower (hp) or watts (W). While horsepower and watts are units of power, an amp is not. But if you know the voltage, you can calculate the power in watts, since watts are just amps times volts. If a motor is energized by 18 volts and draws 1.5 A, it's power consumption is 27 W (18 x 1.5). To convert watts to hp, just remember that one hp equals 746 watts. So if your corded saw is rated at, say, 0.25 hp, that's the equivalent of 186 W. Dividing that by 18 volts yields 10.36 A. DAMN, that's a lotta current!

Block diagram of ic-7489 as 16x4 ram?

Use the link below to go to the data sheet for the IC. On page 5-4 you will see the logic diagram. Using it you can see that A0 - A3 are the address lines used to select the memory location to read from or write to. There are 16 locations. These work in conjunction with the 4 input AND IC's 1-16. These are the decoder section to decode the address and select the memory row. Pin 2 is the Memory Enable pin. This pin enables the memory when it is held low. At the bottom of the page you see the 4 data inputs D1-D4. These are used to input data into memory when the Write Enable Pin (Pin 3) is held low. When the Write enable pin is held high, the data stored at the memory location selected by the address lines will be placed on the outputs. However, the outputs are complemented. So if the data at the selected address is 1001, the output will be 0110. Thus to see the actual data, you would need an inverter on the outputs. So you basically have the address decoder, the memory cells, and the I/O control if you want it in blocks.

Why isn't everything rated at 480 volts?

Not everything needs to be. Many standard wire insulations are rated at 600 volts, some 300, and some are more or less. It would be cost-prohibitive to have everything rated at 480 volts. Especially things designed to operate at 120 volts. Things rated for 480 but running at 120 would be physically larger than necessary, and therefore more expensive. If you're wondering why everything doesn't just run at 480 it's because it's not safe for residential applications.

What is the difference between pulse code and pulse amplitude in brief and concise terms?

In pulse amplitude modulation (PAM), you send a single pulse of a certain height (amplitude) that represents the value of the sampled signal at that time. With pulse code modulation (PCM), you take the same sampled value, but now represent that value by N bits, where N is the number of quantized regions. Why send a whole bunch of bits instead of just a single pulse? Because PCM performs better in situations of higher noise (AWGN).

Why are the main support cables of the suspension cables designed to sag?

They can't be designed not to. Large cables and ropes are extremely different to stretch straight, because of their high weight-to-length ratio.

What is the basis for selection of aircraft power system?

Assuming you are referring to the electrical power system:
Weight
Light weight inductor cores on alternators, solenoids, transformers etc. The compromise is 400c/s AC 3phase.
Low weight conductors, minimal volts drop over distance, compromise 115volts
Stability
115v 400c/s within mechanical feasibility of reliable constant speed drives for alternators. 12pole/6000rpm.
Versatility
For DC systems 24v is the minimum for acceptable volts drop over wiring distances encountered. Batteries can be small and light. Some compatibility and backup capability with the 26v 400c/s instrument systems.
Safety
Voltages within safety capability of insulation exposed to a wide environmental range of temperature, humidity, vibration, and aircraft fluids. All safety systems able to detect and trip 'out of range' voltage, current, frequency, and earth faults.
Terminations, plugs and sockets have to be selected for the aircraft environment and to consider security and corrosion.
It is a system that has evolved from years of learning from experience.

Is RFID part of IT?

Yes, RFID both assists and is overseen by IT. RFID (Radio Frequency Identification chips) is a part of tracking assets including those of IT. It has become important in keeping track of the location and movement of physical equipment. The major contribution for RFID has been for the supply chain system, where RFID complements the DBMS (DataBase Management System) in the efficient acquisition and use of high-priority equipment.

What does the acronym MCM stand for?

I assume you are looking for the meaning of this acronym.

M = thousands

CM = circular mils

CM is the cross-sectional area of wire whose diameter is measured in MILS

One MIL = One-thousanth of an inch

A lesser ussage is KCM, where K = thousand

Common MCM sizes in the electrical trade are 500, 350, 250 Additional Answer First of all, 'MCM' isn't an acronym; its an abbreviation. 'Acronyms' are words formed from abbreviations, so must be pronounceable which, clearly, 'MCM' isn't!

A circular mil (CM) is a figure that represents the cross-sectional area of a circular-section conductor whose diameter is one mil (i.e. one-thousandth of an inch).

It's important to understand that a circular mil doesn't actually measure cross-sectional area, it merely a figure that represents a cross-sectional area. This is because 'squaring a diameter' doesn't result in a unit of area unless the ratio 'pi' is taken into account (because area = pi x radius2).

To confuse matters further, 'M', in this rather-odd system of measurement, represent '1000' rather than the more-usual 'k'.

Interestingly, the circular mil is a measurement unique to North America. Elsewhere in the world, conductor sizes are measured in square millimetres.

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I suppose that MCM is the incorrect acronym for micrometer.

The micrometer is unit of length, with the symbol μm; the value is 0,000 001 m.

How does the ground reduces the noise in electrical circuits?

A grounded metal shield that is around a signal wire prevents outside electric fields from reaching the signal wire. This is because electrons are free to move in a metal and the electrons in the metals surface move in response to the outside electric field. Below the metal surface the electric field is canceled by the field created by the electrons that have been drawn to the metal surface by the outside field, which is the noise source. Since the signal wire is within the metal cage it does not receive the noise.

Why Auma MOV giving MWG defective and showing open and torque fault at tha same time?

HI,

1-MWG defective because of its setting which required after changing or install new MWG Transmitter assemble so you required for this higher level password.

2-MWG assembly not compatible or internal fault.

What interferes with remote control signals?

Other radio signals. They can be from many different sources. Walkie-talkies, TV remotes, etc. Pretty much anything the broadcasts has the potential to interfere if the broadcasting channel is close to the signal band of your RC.

Why use resistor grids in DC motors?

resistor grids were used in DC MOTORS during dynamic braking. in this method of braking a resistance ( variable) is connected across armature winding so as to dissipiate the energy. the energy thus dissipiated is used for braking of motors.

Why is there a resistor on a 36v solenoid?

It reduces contact noise by reducing large voltage and current spikes as the relay is opened and closed, called a snubbing resistor.

Before the age of solid state controllers, there were no resistors across the solenoids. The purpose of the resistor is to provide a charging voltage for the capacitors inside the solid state contoller. Without the resistor it would take several seconds for the (50,000 microfarad) capacitor to charge and the equipment to run. With the resistor the capacitors are charged while the solenoid is open and the equipment is ready to run at all times.

What is routing table?

A routing table has columns for at least three types of information, Network ID, the Cost and The ID of the next Router called Next Hop.

A diode is a perfect short when it is forward biased True or False?

A forward biased diode is not a complete short. Depending on it's design, it will have some forward voltage drop. Silicon diodes normally hafe a drop around .7 V, germanium have a drop around .2V. Some of the newer Schottky diodes fall in between. Selenium diodes have a greater FWD drop.

What are some examples for transformers turn ratio?

Applying turn ratio to a transformer is to step up or step down voltage in an AC system. If you apply a 120V/60Hz (US outlet) to a 3:1 tranformer, you will output a 40V/60Hz signal as the primary side (input) has 3 times the turns (windings) as the secondary (output). From the law of conservation of energy, the secondary side (40V) will now have 3 times the current than the input.

120V x 3A = 360 Watts

40V x 9A = 360 Watts

Example: 40V AC Motor with 9A has more torque than a 120V AC Motor with 3 Amps as current is porportional to torque. Voltage is porportional to speed.