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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
How to Reduce PCB Assembly Cost Without Sacrificing Quality?
When working within any industry, the cost of materials must be worked into the cost of the services provided. Otherwise, you are losing money and not doing yourself any favors. While this is a fair pricing system, increased prices due to material usage can be offputting to customers and clients. Let’s take a look at how to reduce PCB assembly costs without sacrificing the quality of your work or components.
● Optimize Everything
● Use Manufacturer Sources
● Deliver a Full Bill of Parts
● Inspections and Error Reductions
● Get Professional Help
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Mass and pendulum oscillation?
Mass oscillation time period = 2 pi sq rt. (m/k) Pendulum oscillation time period = 2 pi sq rt. (l/g)
Whether alternating current or direct current is safer?
Well, voltage and current levels being identical, alternating current would be safer. It does not spend 100 percent of its time at peak voltage, therefore the average power in case of an electric shock is lower than that of direct current, which is 100 percent. This lesser average may allow some time to detach from the circuit and may not cause such catastrophe to the body.
Conductivity of distilled water nonelectrolyte stgrong electrolyte weak electrolyte?
Distilled water is a non electrolyte, since it doesn't contain free ions.
No one knows, but I have a theory. I think maybe Elijah Alexander Smalls III did because Thomas Edison was to busy making the light bulb, so Elijah started working on series and parallel circuits. Another reason I think that is because they were at one time working together to make and improve the light bulb. It's just a theory, but it's a good one!
Why you use sine wave for ac power supply why not triangle wave or square wave?
AC power comes from an electrical generator, which is a set of stationary coils (the stator) around a rotating magnetic field (the rotor). This configuration produces a sinewave output. We use a sine wave on the power grid because that's the way the electricity is generated, and it is a "natural" thing to do. It's a "pain" to have to convert it to another waveshape. There is also the fact that some nasty harmonics will appear on the power grid if we try to use triangular or square waves. Particularly with a square wave. The electrical loss will be higher, too. See the generator link below. Additionally, the sine wave is the the 'purest' waveform, being the root of all other period waveforms. See Fourier series link below.
What is small piece of semiconducting material on which integrated circuits are etched?
We don't generally "etch" integrated circuits, but, rather, we "grow" them layer by layer on a silicon substrate.
Which op amp is base of neural networks?
The generic op-amp would suffice for lab experiments. A number of summer amplifiers attached to a central amplifier attached to a comparator is what those at Robert Gordon University apparently use. The virtue of that design is that all those parts can be made from op-amps.
Although I have not tried it, a schmitt trigger, which can also be made from op-amps, can probably be used instead of a simple comparator - making analogue ternary (three-state) logic, in other words.
Cheers.
For details, see http://www.rgu.ac.uk/files/chapter10%20-%20implementing%20ANNs.pdf
Why is a resistor needed to discharge or charge a capacitor in an electric circuit?
A resistor may be used in series charging for current limiting, filtering, or as a signal isolater. Resistors across caps are to discharge them for your safety or equalize voltages across the caps in series filtering circuit.
A watt is a measure of power. It is volts multiplied by amperes, or just volt-amps to lots of electrical types. The amount of power is very easy to measure, but it can be used quickly or slowly, depending on the device "sucking up the power" from the source. A watt can last for a long, long time (as in a watch battery), or can be gone in a moment (as it would be when the microwave oven is turned on).
According to Wikipedia:
"Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal (solder) into the joint, the filler metal having a lower melting point than the workpiece. Soldering differs from welding in that soldering does not involve melting the work pieces. In brazing, the filler metal melts at a higher temperature, but the workpiece metal does not melt. Formerly nearly all solders contained lead, but environmental concerns have increasingly dictated use of lead-free alloys for electronics and plumbing purposes."
Soldering is a process whereby two or more metal parts (wires, component leads, pipes, etc.) are joined by the melting of a metal between them. The melting metal is known as solder. Traditionally, it was usually composed of an alloy of primarily tin and lead, but due to current environmental regulations, the use of lead in solder is becoming rare. In common useage, the phrases "solder joint" and "solder connection" mean the same thing (see below), and are used interchangeably. The word "connection" by itself can refer to either a "solder connection" or to the metal parts before they have been soldered. Confused? It's gets easier when you look at how the word or phrase is used in a sentence... as follows. The soldering process requires the heating of the parts of the connection to "wetting" temperature, the temperature at which the solder will chemicaly alloy with the metal parts being soldered. This temperature is dependant upon the alloy of solder that is being used; with " traditional" alloys, it is approximately 500 degrees F. Current no-lead solders require considerably higher wetting temperatures. In either case, if "wetting" temperature is not reached, when the solder is applied to the connection, it will melt and flow onto the metal parts, but will not alloy with them, thereby causing a "cold solder joint". By the way, cold solder joints are NOT usually dull and grainey. Dull and grainey solder joints are overheated. Cold solder joints appear uneven and lumpy, and lay on the surface of the connection like water on a waxed car hood - the solder does not flow out smoothly. Depending on the application, the heat required to make the solder connection can be provided by a soldering iron, a solder gun, a torch, or a hot-air gun. Other methods exist, but are usually used only in automated processes. When a solder connection has been made properly, the connection is solid metal; there is no barrier or space between the parts of the connection. Essentially, the solder has blended with the parts of the connection, forming what is called an "interrmetallic alloy". The intermetallic alloy forms where the space between the parts was before the soldering was perforrmed. Without the formation of the intermetalic alloy, a true solder connection has not been created; what would exist would be "encapsulation" or simple "adhesion", but not a solder connection. This type of metal-to-metal connection is mechanically weak when comaperd to a solder joint, and will not provide the long term reliability and low electrical resistance that a true solder joint will provide.
Soldering is a process whereby two or more metal parts (wires, component leads, pipes, etc.) are joined by the melting of a metal between them. The melting metal is known as solder. Traditionally, it was usually composed of an alloy of primarily tin and lead, but due to current environmental regulations, the use of lead in solder is becoming rare. In common useage, the phrases "solder joint" and "solder connection" mean the same thing (see below), and are used interchangeably. The word "connection" by itself can refer to either a "solder connection" or to the metal parts before they have been soldered. Confused? It's gets easier when you look at how the word or phrase is used in a sentence... as follows. The soldering process requires the heating of the parts of the connection to "wetting" temperature, the temperature at which the solder will chemicaly alloy with the metal parts being soldered. This temperature is dependant upon the alloy of solder that is being used; with " traditional" alloys, it is approximately 500 degrees F. Current no-lead solders require considerably higher wetting temperatures. In either case, if "wetting" temperature is not reached, when the solder is applied to the connection, it will melt and flow onto the metal parts, but will not alloy with them, thereby causing a "cold solder joint". By the way, cold solder joints are NOT usually dull and grainey. Dull and grainey solder joints are overheated. Cold solder joints appear uneven and lumpy, and lay on the surface of the connection like water on a waxed car hood - the solder does not flow out smoothly. Depending on the application, the heat required to make the solder connection can be provided by a soldering iron, a solder gun, a torch, or a hot-air gun. Other methods exist, but are usually used only in automated processes. When a solder connection has been made properly, the connection is solid metal; there is no barrier or space between the parts of the connection. Essentially, the solder has blended with the parts of the connection, forming what is called an "interrmetallic alloy". The intermetallic alloy forms where the space between the parts was before the soldering was perforrmed. Without the formation of the intermetalic alloy, a true solder connection has not been created; what would exist would be "encapsulation" or simple "adhesion", but not a solder connection. This type of metal-to-metal connection is mechanically weak when comaperd to a solder joint, and will not provide the long term reliability and low electrical resistance that a true solder joint will provide.
What is the unit of electrical capacitance?
The unit of electrical capacitance is Farad (F) named after Michal Faraday. A farad is the charge in coulombs a capacitor will accept for the potential across it to change 1 volt. A coulomb is 1 ampere second.
What is the function of zener dioed?
The function of a zener diode is for it to act as a voltage regulator in the breakdown region.
'Rem' stands for remote, you connect a turn on lead to it so the amp knows to power on.
Is a plug in a series or parallel circuit?
Every outlet in your house, and everything in your house
that's plugged into an outlet, is in parallel.
Do diodes other than LED's emmit light?
Yes ,laser diodes actually emmit light .
All other diodes serve to block voltage ,or zenner diode to regulate.
the winding would burn....
How does a pn junction diode work?
we start two different bits of semiconductor, one n-sort, the other p-sort.
Unite them and go along with them to make one bit of semiconductor which is doped distinctively either side of the intersection.
Free electrons on the n-side and free openings on the p-side can at first meander over the intersection. At the point when a free electron meets a free opening it can 'drop into it'. So far as charge developments are concerned this implies the gap and electron scratch off one another and vanish.
The free electrons and gaps close to the intersection have a tendency to eat one another, creating a district exhausted of any moving charges. This makes what is known as the consumption zone.
free charge which meanders into the consumption zone ends up in a district with no other free charges. By regional standards it sees a ton of positive charges (the contributor particles) on the n-sort side and a ton of negative charges (the acceptor iotas) on the p-sort side. These apply a power on the free charge, driving it back to its 'own particular side' of the intersection far from the exhaustion zone.
The acceptor and giver iotas are 'nailed down' in the strong and can't move around. Notwithstanding, the negative charge of the acceptor's additional electron and the positive charge of the giver's additional proton tendto keep the consumption zone cleared clean of free charges once the zone has shaped. A free charge now obliges some additional vitality to conquer the powers from the giver/acceptor particles to have the capacity to cross the zone. The intersection along these lines demonstrations like an obstruction, hindering any charge stream over the boundary.
More often than not, we speak to this obstruction by "twisting" the conduction and valence groups as they cross the exhaustion zone. Presently we can envision the electrons needing to 'get tough' to move from the n-sort side to the p-sort side. For straightforwardness we tend to not trouble with drawing the genuine benefactor and acceptor particles which are bringing about this impact.
The openings carry on a touch like inflatables weaving up against a roof. On this sort of chart you oblige vitality to 'force them down' before they can move from the p-sort side to the n-sort side. The vitality needed by the free openings and electrons can be supplied by a suitable voltage connected between the two closures of the pn-intersection diode. Notice that this voltage must be supplied the right path around, this pushes the charges over the hindrance. Notwithstanding, applying the voltage the "wrong" path around exacerbates the situation by pulling what free charges there are far from the intersection.
What type of rectifier used in radar?
the usual semiconductor rectifier used in the microwave band is a gunn diode. Vacuum tube diodes are sometimes used too.
Does the iPod touch require additional charges?
Tax is the only additional charge on iPods. So unless you are including accessories like screen protectors and cases, the original price is the price paid.
