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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
Why is it necessary to digitize voice signals?
To minimize the distortion of analog signals during transmission
Because digital lines transmit signals more efficiently across distances than analog lines
Because many telephone networks are moving over to digital interfaces
Why you do negative edge triggering to the counters?
Normally, for any counter, we can use both PET (Positive edge triggering) or NET (Negative edge triggering). But, most of the time we use NET. The reason is that in case of PET, considering a standard asynchronous counter ( n-bit), the output of nth flip-flop will change it's state, as it's preceding flip-flop changes it's state from 0 to 1 or low to high. In general, we take the output of flip-flop from Q input, and, the counter will seem to run in reverse order, if PET is used.
This can be understood by an example. Let us take a 2-bit counter with PET J-K Flip-Flops. Let the clock input is applied to the first Flip-Flop. Now taking a look at it's states. Assume that, initially all the flip-flops are at logic low. At the first rising edge of the clock pulse, FF0 (First flip-flop) will change it's state from 0 to 1. This transition from 0 to 1 by FF0 is the clock input to FF1, which sees a rising edge at it's clock input, will also change it's state from 0 to 1. So, at the first clock pulse, the counter will go from it's initial state of 00 to 11. On, second clock pulse, FF0 will transit from 1 to 0, but FF1 will remain at 1 because it is seeing a falling edge. So, the state will shift from 11 to 10. At third pulse, FF0 will shift from 0 to 1, and FF1 will shift from 1 to 0. so, the state will shift from 10 to 01. Finally, at fourth clock pulse, FF0 will shift it's state from 1 to 0 and, FF1 will remain at it's previous state. so, the new state will be 00. Now, taking a look at complete cycle we will have, 00,11,10,01....... so on. So, it is clear that counter is behaving as down counter or reverse counter.
It is a general practice to take output from Q output and not from Q-bar (~Q). So, a better method is to use NET. Since, the output of FF1 in that case will shift it's state when FF0 will shift from 1 to 0. So, the state cycle in that case will be, 00,01,10,11..... so on. It is clear that output of FF1 is changing only when FF0 is changing from 1 to 0 ie. falling edge.
So, to conclude, we can say that in general, we use negative edge triggering in case of counters.
What is the role of center trapped transformer in full wave rectifier?
centre tap transform convert ac into full wave rectifeir dc .It needs only two diodes but efficiency is less.
Why a pn junction posses capacitance?
depletion region acts as dielectric between conducting p-plate and n-plate.
Note: junction must be in non-conducting state.
WHY CAN’T WE THROW THE ELECTRONIC DEVICES IN REGULAR DUSTBINS?
WHY CAN’T WE THROW THE ELECTRONIC DEVICES IN REGULAR DUSTBINS ?
Electronic devices are made up of heavy metals like lead, mercury, cadmium, beryllium, PVC etc. If one throws e-waste in the dustbin it leads to landfills. It may leach out toxins in the soil and pollute the environment and groundwater. Electronic devices are components that are made of raw materials. So, recycling e-waste would be the better option and it leads to less energy.
The fact of extracting metals and plastic from e-waste is to make more electronics but it is not at all easy. If we throw e – gadgets in the dustbin that leads to environmental pollution and unregulated groundwater supply. We are the ones who are doing this and are getting affected too. These metals are difficult to extract as most of e -gadgets used are 10 times more – energy-efficient than smelted ore. We should start recycling e-waste at least from now on.
Some may think that a scrap dealer is a good option for e-waste recycling. The answer might be no. When we give our e-waste to scrap dealers, we are being a step forward to the chain of unregulated markets. These markets extract metals from devices to sell but with fewer skills and necessary safety standards may not be up to the mark. These can also be great harm to dealers who are selling and it causes environmental pollution.
By performing 4 Rs a consumer can recycle e-waste
Reuse: Use gadgets for longer. Then upgrade to a new e – gadget if you ideally think there’s no necessity.
Repair: Do note that you have a recovery policy. If you don’t then that may be a problem as when you want to give for the repair you won’t get any warranty.
Recycle: Talk to the brand you had purchased. Discuss with them. Discuss the return policy.
Most brands have information on their websites. You can also go through it.
Research: Here’s a near R called research added by Sushmita Pai (Head of Outreach at Swachh, Pune). What we need to look for is something for bio-compostable within a period. Everything is biodegradable at its own time and ultimately brands accepting this Research is also important. If the brands sell then it gets a larger presence. So, E-waste depends on how brands convey it. Till 2020 E-waste had generated 3 million tons and it will increase rapidly and exponentially. In this meantime, of this Research, we consumers can give attention to e-waste recycling. A good mindset is all needed for this Implementation.
Its important us to remember that tossing out electronics instead of recycling does lot of harm to environment and to us. If in our country doesn’t support that law also, we shouldn’t throw e-gadgets in dustbins. Instead, we need to recycle them. We can give the e – gadgets to Great lakes Electronics Corporation who have an experience from years. It is a friendly recycling in electronic products field.
The team of this Corporation dismantle the parts and if there is any use then they send them for metal recovery or else those are sold to reuse.
.205 watts or 205 mw
What resistor do you use for a 12 ohms if 1 amp goes through?
You need a resistor rated to dissipate 12 watts (P = I^2 * R).
You may be hard pressed to find locally, I would suggest using www.mouser.com. There is a part 280-CR15-12-RC (15 watt, 12 ohm 5% resistor) for $.63 (US). Mouser has a lot of parts, this is just the first that popped up in my search, so you should be able to find whatever you need (I use this site when prototyping).
I felt there was some bias against liberals in the conservative vs liberal section. I think the more accurate statement is that the snd does not capture the nuances of the different party beliefs and instead provides a generic caricature of the differing sides.
Does the fuse on the primary side of a transformer protect the secondary side?
Yes, but it's usual to have fuses on both sides of the transformer.
You should look at the transformer vector diagram, or the type of transformer will tell you (something like YnD1, for example). If it's a Y/Y type transformer, the phase angle will be zero. If it is a D/D, it will be zero. If it's a Y/D, or D/Y, it could be +30, -30 (usually). I have seen a few strange cases where a Y/D was +150 degrees.
Which type of temperature senseing instrument you use in industry?
for temperature sensing i will suggest a RTD or A THermocouple. for temperature sensing i will suggest a RTD or A THermocouple.
Can you use a rectifying diode to reduce voltage in an AC circuit?
No, you must use one of three options depending upon your circuit and what you want to accomplish:
1. Use a transformer (ie; 24 volts into 12 volts).
2. Use a voltage regulator circuit.
3. Use a ZENER diode that is rated for the maximum voltage you desire in your circuit.
Example: A 12 volt circuit with a 5 volt zener diode (the diode will only let a maximum 5 volts get through and will disipate the remaining voltage to ground. (requires proper design and resistor selection).
ANSWER: YES ABSOLUTELY if there is a full wave rectifier removing one diode will reduce the voltage and reduce power too.
Classify the networks based on transmission technology?
Classification of networks based on transmission technology?
There are two types of networks are available in this transmission technology.
They are
1.Broadcast Network
2.Point-to- Point Network.
What will be the inductance in inductive circuit at low frequency?
The inductance doesn't change,
but the impedance (equivalent to resistance) will be very low.
What four parts of a control system must work together in a feedback loop?
A control system's feedback loop consists of four key components: the sensor, which measures the current state or output; the controller, which compares the measured output to the desired setpoint; the actuator, which implements the necessary adjustments based on the controller's commands; and the process itself, which is the system being controlled. These components must work in harmony to ensure that the system can respond appropriately to changes and maintain stability around the desired target.
What is line of sight communication?
Line of sight communication is in the VHF and higher frequencies of the RF spectrum where the wavelength is to short to pass over structures and hills, the transmitter and receiver antennas must be in line of site
