Electronics Engineering

A: Sometimes a spectrum of frequency must be analyzed a voltage to frequency converter can be used to sweep a range of frequency just by changing some DC level.

The 1 stands for number of semiconductor junctions

The N means it's a semiconductor diode

If the person working on a circuit is unqualified, any voltage is dangerous! If you have not been properly trained, stay away!

In this case, the peak voltage, which is half the peak to peak voltage, is 100 volts. Additionally, the half-wave rectifier will only provide an output for half the input cycle. In the case of a full wave rectifier, the RMS output voltage would be about 0.707 times the value of the peak voltage (100 volts), which would be about 70.7 volts. But with the output operating only half the time (because of the half wave rectification), the average output voltage will be half the 70.7 volts, or about 35.35 volts RMS.

No, it isn't. That's why we use it to clean electrical equipements ( dry ice blasting).

it can be added that is how circuit boards are tested for low temperature operation

In order to cause the waves to carry information from one place to another.

AND THE SIZE OF ATNENNA PROPORTIONED WITH THE LENGTHT OF WAVES

IN ORDER TO DECREASE THE SIZE OF ATNENNA WE MUST FIRE HIGH FREQUENCY CAUSE

HIGHER THE FREQUENCY IS ,AND SHORTER THE WAVE IS

The offline UPS is in standby mode. The charger is maintaining the battery, but the inverter stage is not running. Power goes from input to output, bypassing the inverter. In this configuration, the charger and inverter design is less, as the charger is usually in trickle mode and the inverter does not need to run continuously. On power fail, the inverter starts up and takes the load. There is a glitch in output, a few line cycles, but most loads can handle this. The online UPS runs all the time. The charger now runs the inverter, as well as maintaining charge on the battery. The inverter supplies the load. Power goes from input to charger to inverter to output. In this configuration, the charger and inverter design is more, as they need to run continuously. On power fail, there is no glitch, because the inverter is already running and supplying the load. Usually, there is synchronization between the inverter and the line, so that failure of the inverter can initiate fall-back to the line without glitch.

Hopefully it's a fuse.

Gillham code is Gray code implemented as a binary-quinary combination. When a Gillham value is converted as Gray to binary in the ordinary way, the least significant 3 bits will have values of 1 through 4 and 7 ( a reflecting pattern of 5 values only).

This was done to produce a quasi decimal system. (5 X 2 =10) that would be compatible with mechanical altimeter mechanisms where one dial rotation is 1k or 10k feet.

Here is a conversion algorithm that looks quite good. I lifted it from a website, http://www.ccsinfo.com/forum/viewtopic.php?p=77544 :

signed int32 GillhamToAltitude( int16 GillhamValue )

// Data must be in following order (MSB to LSB)

// D1 D2 D4 A1 A2 A4 B1 B2 B4 C1 C2 C4

{

signed int32 Result;

int16 FiveHundreds;

int16 OneHundreds;

// Convert Gillham value using gray code to binary conversion algorithm.

// Get rid of Hundreds (lower 3 bits).

FiveHundreds = GillhamValue >> 3;

// Strip off Five Hundreds leaving lower 3 bits.

OneHundreds = GillhamValue & 0x07;

FiveHundreds = GrayToBinary(FiveHundreds);

OneHundreds = GrayToBinary(OneHundreds);

// Check for invalid codes.

if (OneHundreds 7) OneHundreds = 5;

// Correct order of OneHundreds.

if (FiveHundreds % 2) OneHundreds = 6 - OneHundreds;

// Convert to feet and apply altitude datum offset.

Result = (signed int32)((FiveHundreds * 500) + (OneHundreds *100)) - 1300;

return Result;

}

unsigned int GrayToBinary(unsigned int num)

{

unsigned int temp;

temp = num ^ (num>>8);

temp ^= (temp>>4);

temp ^= (temp>>2);

temp ^= (temp>>1);

return temp;

When working on PC boards or any electronic equipment, heat is the biggest enemy. A low wattage soldering iron is the best because it will generate only enough heat to melt the solder and not heat up other adjacent components that are near to the point that you are soldering. Also when working on electronic equipment use a solder with a low melting point. There is a special low temperature solder with a rosin core that is made especially for PC boards. Never use acid core solder on any electrical soldering jobs.

bridge rectifier is the best rectifier.

To produce 60 watts at 120 volts, you need 0.5 amps (Watts = Volts * Amps) At 120volts, a 240ohm resistor would produce 0.5 amps (Amps = Volts / Resistance) A 60 watt bulb will have a resistance of 240 ohms. Note that this is the resistance while the bulb is hot. You might measure a different resistance if you use an ohm meter because the filament is cold.

voltmeter

The main disadvantage of a bridge rectifier is that it needs four diodes, two of which conduct in alternate half-cycles. Because of this the total voltage drop in diodes becomes double of that in case of centre-tap rectifier, losses are increased and rectification efficiency is somewhat reduced. This poses a problem when low voltages are required. Another disadvantage of bridge rectifier is that the load resistor R

Land the supply source have no common point which may be earthed.

zener cut in voltage

10 Ohms.

Semiconductors are the materials that has conductivity higher than the insulator but lower than the metals. Can be used in various purpose i.e., LED, LASER also fabricating various ICs etc.

multiplies source voltage, two 12v dc batteries in series become a 24v circuit; also multiplies resistence

To be qualified to be a PNP can depend on the state you wanting to do it in. They base it off your age, height, sex and you will have to take a neuro psychiatric test before making a decision.

If you are talking about the circuits load being to large for the circuits capacity, then the circuits over current or over load protection will come into effect. The fault will open the circuit, thereby isolating the load from the electrical supply source.

intelligent building

Alternating Current is measured in Amperes.

Add the two together. For instance, two 100 ohm resistors in series have a total resistance of 200 ohms.

Both AC and DC are current methods in which electrons move along a wire