Electronics Engineering

In high-performance memory systems these decoders can be used to minimize the effects of system decoding. When used with high-speed memories, the delay times of these decoders are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The DM74LS138 decodes one-of-eight lines, based upon the conditions at the three binary select inputs and the three enable inputs. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented with no external inverters, and a 32-line decoder requires only one inverter.

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An Analogue signal.

CT (current transformer) Burden is the maximum load that the CT secondary can drive (e.g. meters or protection relays)

Why do you care about burden when ordering current transformers?

The burden is the termination impedance of the measuring instrument. The measuring instrument can be an analog or digital energy meter, a data logger or a recorder. All instruments that use a current transformer to measure line current must terminate the CT with a resistance (impedance in same case which means there is some inductance involved).

A CT supplier should be given the burden when ordering. Technically, the total burden for a CT is the internal winding resistance, the connecting lead resistance and the measuring instrument input resistance.

Some Ct's are installed a long distance from the measuring instrument and the connecting leads can have a resistance as much as 0.002 ohms per foot (both ways because the current makes a complete round trip). This resistance will cause an error if not taken into account.

Gate current is denote by Ig

consider a dynamiter D having a moving coil and a fixed coil. The moving coil is supplied from I/P source whose waveform is to be analysed.

Fixed coil is supplied from harmonic generator. Steady deflection of dynamiter result only from those current wave forms in moving and fixed coils which have some frequency.

There are so many websites who can give the idea of projects. you can take assistance from there and also you can search on google. In electronics you can choose from various options all depend on your interest. You can make like

Automatic lawn dryer

Automatic Water Level controller

Magnetic levitation and many more.

For more help and assistance you can go through purpleladders.com. It will help you more in that.

Source URL: http://www.purpleladders.com/electronics_project_ideas.php

According to the health codes and the danger of throwing batteries away, you should recycle ALL batteries. From AAA all the way to you car battery should be recycled.

Generally speaking, equivalent circuits are used to simplify a complex circuit into terms that are solvable with known relations. For example, in a transformer equivalent circuit you can account for winding losses and flux leakage with a series resistance and reactance on the primary side. Core losses can be modeled similarly with a parallel resistance and reactance on the primary also.

Essentially when reflecting/referring an impedance to the primary side of a transformer, you are just seeing what the secondary impedance "looks like" to the primary side. Since the secondary impedance will determine the load on the primary, it is helpful to know how to relate it in terms of the primary so as to calculate the current flow in the primary due to the load on the secondary.

Alternating Current

Each full adder inputs a Cin, which is the Cout of the previous adder. This kind of adder is a ripple carry adder. Al-firoz hossain
CE-07002
MBSTU.
Bangladesh.

dB is the abbreviation of Decibel

shorted

The power supply provide max current and voltage droops accordingly. If the supply has a relatively high internal resistance compared to the short (nothing is truly zero)then V=0, I=max. If the supply is capable of higher currents, then maybe a fuse blows, the wire melts, or a fire starts.

If we're talking 9v little transistor radio battery and 18Guage wire, V=0 and I~200ma.

If we're talking 12V,1000Amp auto battery, the 18G wire melts, voltage barely twitches before the circuit opens.

So it's all relative...

Embedded processor is a part of the computer that follows instructions and carries out action.It is like the "brain" of a computer.

true

Doppler Radar uses the Doppler effect to determine speed toward or away from the Radar. When a Radar return has a higher frequency than the transmitted pulse, the object is coming closer, and the *difference in frequency determines speed. Lower frequency- object is moving away. This is used by police, and for weather Radar to help detect not only speed but to detect patterns characteristic of tornadoes. Also used for other applications not just military.

You are your own Doppler system using audible frequencies. You can tell when a car, plane, or train is approaching vs moving away.

With an insulated handle wire cutter.

the property of being bendable is called malleability

A half-subtractor lets you borrow out, but not borrow in.

A full subtractor is made by combining two half-subtractor and adding an OR-gate. (lets you both BOR_in as well)

september 20 1873

If it is a physical switch, this is called a "relay" or a "contactor". If it is a semiconductor device, it is typically a triac, SCR or a thyristor.

It will just be the sum of the current-carrying capacity of each individual cable.

it is basically used in the timer alaram tat is used in the collage.alo it is used in telephone ckt's for ring tone