Electronics Engineering

Electric energy cause a membrane to move by turning into mechanical energy. The movement of the membrane causes the air pressure to besequentially increased and rarefied. This "train" of increased and rearefied air pressure propagates into the room, and if it strikes our ear drums we perceive it as sound.

The amp for audio freq. is a AF amplifier. The RF amp is for radio freqs.

no voltage will be induced on the secondary side of the motor as the windings will become saturated.

The initial condition is the voltage and/or current existing at the time a mathematical solution begins. Example: what happens when a resistor is connected across a capacitor? well, you say that at t=0 the resistor is connected, then after that the voltage across the capacitor is v0.exp(-t/RC), where v0 is the starting voltage, t is the time, R is the resistance and C is the capacitance. This simple solution needs only one initial condition which is the starting voltage v0 across the capacitor.

Linear differential equations are common in electrical engineering and a complete solution of one (such as the example) always requires one or more initial conditions.

gain in an op-amp is the output voltage divided by input voltage.

for the inverting amplifier , gain(Av)=-(Rf/Ri) ,where Rf => resistance of the feedback path & Ri=> inverting input terminal resistance

for the non-inverting amplifier , gain(Av)=(1+(Rf/Ri)) , where Rf => same & Ri=> non inverting input terminal resisance

The 74190 is an up/down decade counter. Counters use frequency division to achieve a counting sequence.

To answer your question, it depends on the input frequency. The Qa output will divide the clock input by 2 so if the input is 100Hz, Qa's output is 50Hz.

Since this is a decade (0 to 9, or truncated sequence) counter and not a binary (0 to 15, or full sequence) counter, the outputs Qb, Qc and Qd divide the input but their outputs are not symmetrical (equal time high and time low). Qb and Qc produce 2 pulses for every 10 input pulses, therefore divide the input clock by 5. Qd produces one output pulse for every 10 input pulses, therefore divides the input by 10.

The easiest way to visualize this is to write out the binary count in column format, starting at 0000 and ending at 1001, and looking at each of the output patterns.

To produce the 50Hz output, assuming you are not concerned over symmetry:

-input clock 100Hz for 50 Hz on Qa

-input clock 250Hz for Qb or Qc output of 50Hz

-input clock 500Hz for Qd output of 50Hz

There are 2 type of biasing in PN junction didoe

Forward biasing

Reverse biasing

The XOR (Exclusive Or) gate has a true output when the two inputs are different. When one input is true, the output is the inversion of the other. When one input is false, the output is the non-inversion of the other.

A B R

0 0 0

0 1 1

1 0 1

1 1 0

Look at the last two lines. You see that R is NOT B, but only when A is true. The same can be said of A; R is NOT A, but only when B is true.

A manual typewriter cannot have multiple fonts being used at the same time. The cylindrical type heads of a manual typewriter were also replaced with a spherical type ball in the electronic version.

Matrices have a wider application in engineering. Many problems can be transformed in to simultaneous equation and their solution can easily be find with the help of matrices.

There are several types of television camera tube (also known as pickup tubes). There is the image dissector, the iconoscope, the Super-Emitron image iconoscope, the Orthicon and CPS Emitron, the image orthicon, and Vidicon. There are also currently several new technologies being developed making several new types of pickup tubes

The Coinco S75 9800 was typicaly used in old soda vending machines. You can find out how to change the price for these mechs on sites such as www.colamachines.com. They have a ton of information on old cola machines from th early 30's to the mid 70's

A circuit diagram of a mosquito pester or repellant can be seen at a website called Circuits Today. The diagram is based on the theory that mosquitoes can be repelled by using sound frequencies.

The opposition to the formation (not 'flow') of magnetic flux is the ampere per weber (often spoken as 'ampere-turn per weber'). This is derived from dividing the magnetomotive force produced by a winding, expressed in amperes (often spoken as 'ampere-turns'), divided by the resulting magnetic flux. expressed in webers.

Large Scale Integration
logical system integration

The omega sigh is the unit of measurement for the resistance of energy!

Flat position welding is when your job is in a horizontal position the easiest and best position to do welding, then you get vertical up position where the trick is to weave your arc in a V formation, vertical down is used on thin material if its possible at an angle of 45 degrees last overhead that is the most difficult the opposite of flat welding where the job is upside down

anytime you look directly down on your weld joint, it is a flat weld, flat position weld are not affected by gravity, as opposed to horizontal, vertical, and overhead, all of which the puddle tends to "sag" as you weld

LSA mean Limited Space Charge Accumlation mode. Frequency of oscillation in the LSA mode is independent of the transit time of the carriers and is determined solely by the circuit external to the device. Output power in the LSA mode can be greater than That in the other modes

basically a diode flows an exponential curve Vs current if you try to double the voltage drop by increasing the voltage it should self destruct

One of the advantages of a voice controlled robot is the fact that you do not have to carry around anything else. You simply speak and the robot responds.

In PIC Microcontroller , During the Fatching of instruction no. 1

it needs of one clock cycle, then after for the exicution of instruction no. 1 it reqires one extra clock cycle , but at the same time it fatches inst. no. 2 . Similarly, during the execution time of inst. no. 2 , it fatches inst. no. 3 and so on.

In other words we can say that, PIC Microcontroller requires 2 clock cycle at starting the after it requires only one clock pulse. In this way we can say that instruction pipelining is done in PIC microcontroller.

biometric device

There are many instances where what matters is only the absolute value and not the sign associated with the number.

Sometime functions, eg log(x), may be defined only for positive values of x and so, to ensure that it is valid, you need to take the positive value.

Some pseudo-functions, like square root, give two solutions: one positive and one negative. The principal value is the positive root or the absolute value of the root.

In statistics, one measure of spread is the distance from the mean. To summarise the result for a number of observations, though, you cannot simply add the deviations: that will always give an answer of zero. One option is to look at the absolute deviation instead. [The squared deviation is preferred because, if the deviations are independent, normally distributed, then the sum of the squares have a chi-square distribution which is well studied.

Applications electronic latch are the functions as a circuit and helps when creating memory devises. These are use everyday in are day to day experiences