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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
How do you avoid setup and hold time violations?
To avoid setup time violations:
- The combinational logic between the flip-flops should be optimized to get minimum delay.
- Redesign the flip-flops to get lesser setup time.
- Tweak launch flip-flop to have better slew at the clock pin, this will make launch flip-flop to be fast there by helping fixing setup violations.
- Play with clock skew (useful skews).
To avoid hold time violations:
- By adding delays (using buffers).
What do you mean by buffer in micro processor?
A buffer is merely a temporary storage used in conjunction with computation.
1/(2 x 3.142 x f x C) where f is frequency of the supply & C is capacitance in farads.
for example mains frequency of 50Hz and capacitor of 1uF = reactance of 3182 ohms.
Watts = (volts) squared / reactance = 250 volts sq / 3182 = 19 watts
then multiply by time. Other factors involved but just approximation.
Why are flip flops sometimes considered to be bad for the feet?
There are many reasons flip flops might be considered to be bad for one's feet. The main reason being that the flip flop shoe does not provide enough arch support.
Is the process of sharing information by using a system of symbols to send and receive messages?
communication
What is the principle of Ultrasonic soldering?
Heat is the movement of molecules, Sound is the movement of molecules. Thus with proper application, the energy of sound can be converted into heat.
Where are very large scale integrated chips used?
it can be able to more than 1 lakh transistor in a single chip. so area required is very less and cost is reduced.
What is vertical deflection plate?
As we mentioned earlier, a CRT can be used to graphically and visually plot an electronic signal,such as a sine wave. This is done by using a second set of deflection plates called VERTICAL-DEFLECTION PLATES
As the source impedance is equal to load impedance, it is assumed that both the resistances are in series. This distributes the whole voltage equally between both the impedance. Hence the PD across external resistance will be 1V.
Whrite a Breif note on moving coil microphone?
A moving-coil microphone contains a diaphragm exposed to sound waves. The diaphragm carries a coil placed in the magnetic field. The voltage induced in the coil is proportional to its amplitude of vibration, which, in turn, depends on the sound pressure.
Moving-coil microphone. AP = acoustic pressure, Uo = output voltage, 1 = diaphragm, 2 = coil, 3 = permanent magnet, 4 = protection grid, 5 = case. Cheers ebs
Absolutely. This is acceptable as long as your charger is built for the type of battery used, and the voltage is right. AGM, flooded, GEL, Ni-Cad, and Lead Calcium are typical solar batteries. This battery charger can determine which is which.
http://www.bdbatteries.com/chargers.php?id=7
Basics:
Think of a battery as an electricity tank.
Just like your hot water heater (a water tank) it cares not where the power comes from.
The hot water heater only requires water at the right pressure (voltage) to fill the tank, and not burst it. The rate at which the tank is filled (aka size of the hose) is irrelevant to ability to fill it up. However, the size of the incoming hose has everything to do with how long it takes to charge or discharge the tank.
How To:
Now back to your problem. Assuming your system is 12 volts. Your solar panels are one hose into your power tank at roughly 13.1 volts. The max charging rate for that system if 14.4 volts. The hose isn't as big as possible coming from the solar panels, and when there is no amps (water) coming down the wire (pipe), the battery (tank) is left under charged. To augment the power production, simply hook up any battery charger, the higher the amp rating on the charger, the faster it charges the battery.
Neat trick:
Jump start it with your automobile for 30 minutes. Drive to the gate, without shutting off the vehicle, attach the jumper cables to the battery Positive and the frame. The alternator has a rating of between 80 and 150 amps :) it can charge an 80ah battery in under an hour.
Source: http://www.bdbatteries.com
What is current amplification of a transistor?
a transistor ampify the current
i.e. you the output current proportional to the input one.
in CE amplifier , this ratio is more than one Ic/Ib = current amplification factor
this extra ampitude comes from the biasing batteries used.
Where to get circuit diagram for a remote control toy car model?
Please see the related link below for the only detailed diagram I could find
What is the life of led backlight display?
20,000 to 30,000 hours (approx 3 years) is the average life of a LED backlight display.
How do you get a 20af44 toshiba TV to change to channel video 1 without a remote?
There is no way to change the input without a remote :(.
So far the first robot goes to the Chinese because they have the best documentation (it was a huge water clock with several automatons that did things like display plaques and ring bells), although many artifacts are being unearthed and catalogued that make it a tight race between the Iraq region, Egypt, Greece and India. A short history is in the link below.
What is the difference between electrical and electronics?
Electrical Circuit:
An Electrical circuit is that which is a connection of conductive wires and other devices whereby the flow of electrons occurs.
Electronic Circuit:
An Electronic circuit is that which contains at least one active element in a single circuit; whereby the flow of electrons is controlled by another electrical signal. (either voltage or current)
In short, an electronic circuit is that in which electricity controls electricity...
How do you test Resistance Capacitance diodes and transistors on cathode ray oscilloscope?
It is always better to remove a component from the circuit for proper testing but most of the time a resistor can be tested with a DMM set to the appropriate ohm scale, the same with a diode where the DMM is set to diode setting.
A transistor is more complicated, you first have to find the base connector and with your DMM set to diode, NPN Transistor, with negative probe to the base and positive to emitter or collector the smallest reading will be the collector and the slightly higher reading will be the emitter, no reading mean that it can be a PNP transistor then you will need to swap your probes, still no reading or a very low reading will mean the transistor is damaged
In actuality tektronics do make a curve tracer oscilloscope to test active components . But the speed is very limited. So while it may tell you that the part is good or bad it will not tell you how good or how bad it will function in the actual circuit
Why does a SCR have negative resistance?
Whenever you measure resistance, the resistance itself cannot be negative!
When an SCR (Semiconductor Controlled Rectifier) is not conducting, it has a high resistance between its anode and its cathode. When its gate is triggered and the SCR is conducting, it has a low resistance between its anode and its cathode.
For more information about SCRs, see the answer to the Related Question (for which a link is shown below) and also the Related Link.
Delay program of 1 sec for microcontroller 89C51?
Mov tmod, #01h
mov r0, #20
back:mov tl0,96
mov th0,60
setb tr0
again:jnb tf0, again
clr tr0
clr tf0
djnz r0, back
What causes generators in parallel with same voltages and KW to have different amps?
If they are at the same voltage, and the same kW, the only thing left that will influence the output amperage is the power factor the generator is running at.
Is there a 120 AC dimmer switch wiring diagram for 24 volt DC motor?
The output of a 120 volt dimmer switch will be an AC voltage so should not be used on a DC motor.
