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Electronics
Electronics are a branch of technology and science that deals with the control of the flow of electrons.
3,725 Questions
Can 157 calculators be divided evenly among 6 classrooms and how?
Get a calculator,
Punch in 157,
Divide by 6,
If you get a remainder, the answer is "no".
Can't find a slim flat back 1080p 40 inch TV?
amazon.co.uk/Samsung-UE40B7020W-Widescreen-Television-Freeview/dp/B001UE8LYC Your welcome
A repeater connects two segments of your network cable. It retimes and regenerates the signals to proper amplitudes and sends them to the other segments. When talking about, Ethernet topology, you are probably talking about using a hub as a repeater. Repeaters require a small amount of time to regenerate the signal. This can cause a propagation delay which can affect network communication when there are several repeaters in a row. Many network architectures limit the number of repeaters that can be used in a row. Repeaters work only at the physical layer of the OSI network model.
DEFINITION - 1) In digital communication systems, a repeater is a device that receives a digital signal on an electromagnetic or optical transmission medium and regenerates the signal along the next leg of the medium. In electromagnetic media, repeaters overcome the attenuation caused by free-space electromagnetic-field divergence or cable loss. A series of repeaters make possible the extension of a signal over a distance.
Repeaters remove the unwanted noise in an incoming signal. Unlike an analog signal, the original digital signal, even if weak or distorted, can be clearly perceived and restored. With analog transmission, signals are restrengthened with amplifiers which unfortunately also amplify noise as well as information.
Because digital signals depend on the presence or absence of voltage, they tend to dissipate more quickly than analog signals and need more frequent repeating. Whereas analog signal amplifiers are spaced at 18,000 meter intervals, digital signal repeaters are typically placed at 2,000 to 6,000 meter intervals.
2) In a wireless communications system, a repeater consists of a radio receiver, an amplifier, a transmitter, an isolator, and two antennas. The transmitter produces a signal on a frequency that differs from the received signal. This so-called frequency offset is necessary to prevent the strong transmitted signal from disabling the receiver. The isolator provides additional protection in this respect. A repeater, when strategically located on top of a high building or a mountain, can greatly enhance the performance of a wireless network by allowing communications over distances much greater than would be possible without it.
3) In satellite wireless, a repeater (more frequently called a transponder) receives uplink signals and retransmits them, often on different frequencies, to destination locations.
4) In a cellular telephone system, a repeater is one of a group of transceivers in a geographic area that collectively serve a system user.
5) In a fiber optic network, a repeater consists of a photocell, an amplifier, and a light-emitting diode (LED) or infrared-emitting diode (IRED) for each light or IR signal that requires amplification. Fiber optic repeaters operate at power levels much lower than wireless repeaters, and are also much simpler and cheaper. However, their design requires careful attention to ensure that internal circuit noise is minimized.
6) Repeaters are commonly used by commercial and amateur radio operators to extend signals in the radio frequency range from one receiver to another. These consist of drop repeaters, similar to the cells in cellular radio, and hub repeaters, which receive and retransmit signals from and to a number of directions.
7) A bus repeater links one computer bus to a bus in another computer chassis, essentially chaining one computer to another.
What is the basic principle of ADC?
simple comparator technique.
An analog-to-digital converter (abbreviated ADC, A/D or A to D) is a device which converts a continuous quantity to a discrete time digital representation.
What if you left your charger on the outlet with out charging your phone what will happen?
at this point nothing has happened... you basically have extended the circuit... except it is still an open circuit... until the circuit is closed electricity doesnt move... the moment you close the circle or circuit(like by attaching your phone) then the electricity can flow... electricity needs a complete path(like a circle) to work
How can input impedance is made purely capacitive or inductive or zero or infinite?
By using a matching network, or filter (active or passive).
What Percentage of computers per household in Haiti?
Well in Haiti we only have 20% of computer use for people in cyber-cafe
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What is different between digital and analog?
Consider this:
You want so signal your friend using a torch light. Now you might think there is only one way to signal to your friend by turning on and off the flashlight right? But actually there are more ways.
1) Turning on and off the flashlight
2) Dimming the torchlight and bringing it back to full shine
So here method 1) is the digital way to signal to your friend and method 2) is the analog way to signal to your friend.
Difference: In method one its either full signal or null as in case of digital signal 0 or 1
In method two there is always signal(torch is always glowing) but we are signaling by dimming the glow of light.
cheers,
...kam
In electronics, the term "digital" refers to circuits in which individual data are represented by a discrete set of voltages -- usually only two (i.e., either a "logic 1" or a "logic 0"). In this case, each datum is a binary entity called a bit. Data in the form of numbers other than 0 or 1 (e.g., 2, 365, 3.14159, etc.) are represented as patterns of bits.
In analog circuits, each datum is encoded as a continuous voltage within a range. Such circuits are widely used in such application areas as audio electronics, radio, motor control, etc.
Historically (c. 1960), analog computers were developed that competed with digital computers. However, digital circuits are at the heart of virtually all modern computers.
Define simply type of shift register?
There are several types of shift registers:
PISO: parallel-in serial-out shift registers such as the
7495(?), 74HC165, 74HC166 serial parallel counter load a one and shift it out serially bingo sequential pulses
SIPO: serial-in parallel-out shift registers such as the 74HC595, 74HC4094, TPIC6595, TLC5925. Typically data is shifted into the register one bit at a time through "the" input pin. Most "POV clocks" and "POV displays" use such chips to drive the spinning LEDs.
Most such chips can be wired up to "shift left", or they can be wired up to "shift right", but once wired up can only do one or the other.
bidirectional SIPO: bidirectional serial-in parallel-out shift registers.
Once wired up, an external control line can dynamically switch it from "shift left" -- feeding in a new bit on the "least significant bit input pin" -- and at some other time it can "shift right" -- feeding in a new bit on the "most significant bit input pin".
"universal" shift registers, such as the 74AC299, can do any of the above (at different times): output the current state of the register in parallel, shift left, shift right, and load the new state of the register in parallel.
1. From the lowest frequency to the highest frequency. For telephone grade audio, it's 300 Hz to 3300 (or 3400 ) Hz. For other signals, you need to know the lowest and highest frequencies.
2. Your question (can BB signal be transmitted...) cannot be answered. As it stands, the answer is no. Reword the question so that it can be answered.
How is memory in a PLC organized?
Memory in a Programmable Logic Controller (PLC) is typically organized into several distinct areas: program memory, data memory, and I/O memory. Program memory stores the ladder logic or other programming languages used to control the PLC, while data memory holds variables, timers, counters, and other data needed for processing. I/O memory manages the input and output operations, interfacing with sensors and actuators. This structured organization allows for efficient execution and management of control tasks in industrial automation.
What to do you do if you have CPU usage 80 percent to 100 percent all the time?
Try unloading some applications or if your computer is already really old maybe its time for an upgrade
The characteristics curve of the component?
This is probably the I-V characteristic: Apply a voltage to one terminal of the component, the current through the component is then recorded; this is done for varying values, and is plotted out on a graph. For transistors, this shows where the "linear operation" region is; for diodes, this shows the "turn on" voltage. Such characteristics will be in the data sheets for whatever component you're using.
How do multibeam echo sounders work?
multibeam systems emit a fan of sound beams. By this method, a wide area of the seabed can be scanned in high detail.
What is the three types of wave forms in trigger circuit of oscilloscope?
The three waveforms in the trigger circuit of an oscilloscope are the sine wave, square wave and saw tooth wave.
A Geiger-Müller (GM) counter is used to detect ionizing radiation, specifically from various nuclear decay processes like beta decay, gamma decay, and sometimes alpha decay.
What is the other term for electric eye that can cause electric currents to fluctuate?
Putang inah nyo nakain kayo ng bayag na malaki Wag na kayong mag-aral nakakabobo lng yan!!...
it is probably the charging indicator.
if it doesn't stop at some point like the next day u may need a new battery
