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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
What size resistor to drop 12 vdc to 2vdc?
it is better to use zener diodes or transformators in order to drop 12 vdc to 2 vdc. If you do it with resistor you will waste you power.
Voltage formula for resistors in series V1+V2+........+Vn=Vtotal, so 2Vdc+i.R=12Vdc. Determine the current for you supplier and calculate the value of resistance.
What is the effect of frequency change on transmission losses?
Higher the frequency, higher the losses.
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.
Difference between temporal redundancy and spatial redundancy?
The redundancy is nothing but the reduction.
The temporal locality is of relating to short time requirements.
And the spatial is of relating to over environment.
The redundancy occur in the images are of most common,so many techniques applied to overcome this. In image temporal redundancy is of abrupt transitions while in spatial it is of block based transitions.
Spatial is applied at minimum cost and temporal is at maximum cost.
Threshold values apply to temporal redundancy and the pixel comparison technique applies to spatial redundancy.
as a general rule of thumb, about 5 times the highest frequency for quality reproduction, although one can sometimes get away with a minimum of 2 times.
7.5KHz
A device or circuit that provides power to the rest of the circuit or system is called what?
A device or circuit that provides power to the rest of the circuit or system is called a power supply,
What is the voltage drop through resistor 1?
There is insufficient information in the question to properly answer it. You don't state the value of resistor 1, nor do you state how it is connected in the circuit, nor do you state the value of the other components in the circuit. Please restate the question, giving more details.
What is the function of monitoring voltage relay?
A voltage monitor relay is in the circuit for one reason. It monitors the incoming voltage to the equipment that it is protecting usually on three phase control panels.
The relay monitors the three incoming line voltages and in some relays the voltage to ground (wye connection). If the circuit the relay is protecting looses one of the voltage legs, the circuit will shut down until the problem is rectified. This usually happens if a fuse blows in one of the three phase voltage legs.
It also monitors the level of voltage to the circuit. If the voltage drops due to a malfunction in the utility lines the relay will trip and take the protected circuit off line. The voltages can be set to trip at any under or over voltage usually by set point controls on the front of the voltage monitoring relay.
What is it meant by adaptive problem of control system?
u should ask miss goay... but ask after 7 December 2007
How is faradic stimulation different from electoconvulsive shock?
Faradic stimulation is a small battery-operated "shock stick" with less electrical current and then a pace maker is used. The patient is put to sleep and given a muscular relaxant. A small amount of electric current is then applied to the patient's temples. This produces a seizure.
where as- Electroconvulsive shock(ECT) is induced by attaching two electrodes to each side of the head and passing an electric current through them producing convulsions in the patient. Following this, a state of coma occurs lasting from several minutes to several hours. It is not certain which particular aspect of the shock process bring about positive changed--the coma,the changes in the nervous system from the shock, the violent psychological reaction, or the idea that the patient has taken the shock as punishment which reduces their sense of guilt.
also.- Somatotherapy refers to the treatment of the body for behavioral disorders with such methods as shock treatments, surgery, or drugs. Shock treatment has received mixed reactions. The use of insulin shock was very popular. An overdose of insulin was administered causing a patient to become unconscious.
When the brain lacks sugar through the process of shock, normal pathways to the brain are reintroduced and fortified. Therefore insulin shock returns the patient to normal functioning.
hope this helps:)
by the way im not a professional or anything.
How do you stop flip flop from flopping?
tape it to the bottom of your foot! (
answer is not in detail) naah...just take them off.
Current = Charge / Time
= 90 / 0.02
= 4500 Amperes
The term Hertz (abbreviated Hz.) is used to describe the frequency with which current changes its' direction of flow in a second. Such as, our system frequency is 60 Hz.
When you double your distance from a speaker you lose how many db?
Sound pressure is inverse square law for distance, so doubling distance from a speaker cuts the power by 4. Since the db scale is 3 times log2 (power ratio), a reduction of power by 4 represents -6db.
What circuit would be inside a torch?
you have to collect a battery(cell), battery case, 4 wires, and as many bulbs as you ewould like. now link them together. alexia age 12
A very good answer Alexia.
Here's how I would answer it.
Connect, in series, a cell or battery, a bulb with a voltage rating which corresponds to the cell/battery voltage, and, optionally, a switch.
What is advantages of multimeter?
This handheld mini digital multimeter features easy-to-read LCD readout, low battery indication, fuse and diode protected circuit. Easily fits in a shirt pocket, yet despite its size it is a rugged, full function multimeter that performs the following...
