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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 is HISR and LISR in embedded systems context?
HISR: High Level ISR (Interrupt Service Routine)
LISR: Low Level ISR
It is the reciprocal of acoustic stiffness. Also known as acoustic capacitance.
What is the difference between wind turbines and bigger wind turbines?
bigger wind turbines spread out larger and colect more energy
A larger wind turbine is more efficient than a small one, and costs less to operate per KWH. For example, if you had two 750KW turbines, your total output of energy would be 1.5MW. You would have to have enough area to erect them and they can't be too close together. Then, you would have to pay for maintenance on two units as well as any repairs that may have to be made. Now, if you had just one 1.5MW turbine, you would require less space to erect it, and only have to maintenance and repair one unit. It would cost more to purchase initially, but would save expenses in the long run. And, you could get more energy from the same area as well.
What gases are in cold cathode fluorescent tubes?
It can be any noble gas (though it's never helium).
Normally Neon but occasionally argon, krypton and xenon.
The peak output value in a double ended differential amplifier is double the peak output value of a single ended differential amplifier for the same input signal because there are two outputs, one being the normal output, and the other being the inverted output. Whatever the normal output does, the inverted output does, but with a reverse sign. As a result, if one output has a value of X, then then other output has a value of -X. If you compare the two outputs, then, the difference between them will be 2X, or double the value.
How did the current before the resistor compare with the current after?
Current flow would be the same through the resistor, since it's in series, but the voltage would be slightly reduced based on the resistance.
If you have 2 resistors in parallel, the current will divide through each resistor, and the voltage stays the same.
PLL
Ohm's law and water flow - PLL
How many uf capacitor for using 6V 100amp rectifier?
To determine the required capacitance for a 6 volt 100 amp rectifier, you would need to know the ripple voltage that the circuit would tolerate. You would also need to know the ripple frequency. More specifically, you would need to know the time from one peak value to the intersection of the capacitor's voltage decay curve and the next turn on point for the rectifier.
Let's say that the tolerated ripple voltage is 1 volt, and that the ripple frequency is 120 hertz, as provided by a full wave rectifier. This is a period of 8.3 millseconds. The actual time from ripple peak to ripple trough is actually slightly less than 8.3 millseconds, but that is a function of ripple slope, as somewhat complex calculation, so lets use 8.3 millseconds, which will be conservative.
1 volt in 8.3 millseconds is 120 volts per second. Plug that in to the equation for a capacitor ...
dv/dt = i/c
..., along with the current of 100 ampere, solve for c and you get ...
dv/dt = i/c
120 = 100/c
c = 100/120
c = 0.83 farads
Now, 8.3 farads is a very large capacitor. Lets improve the situation with a three phase rectifier. In that case, the ripple frequency is 360 hertz, or 2.8 milliseconds, requiring a 0.28 farad capacitor, still a large value, but better than 0.83 farads.
How do you improve your am radio signal?
The cheapest and easiest way is to improve the antenna. The most expensive, most sensitive,
most selective receiver can't do anything without a decent signal to work with.
Certainly not.
The 74LS48 is a BCD to 7 segment decoder, and the CD40106 is a hex schmitt trigger inverter.
A 7 segment display is the type of numeric display that consists of seven bars that form an 8 when all of them are lit. The LS48 takes a 4 bit BCD word and figures out which bars to light up.
What is the expression for calculating maximum current through the zener diode?
the expression for calculating maximum current through the zener diode is :
Izmax=Pzmax / Vz
Why you use capacitor before connecting transtitor?
Before connecting to the transistor we use a capacitor because
for the transistor to amplify we should first apply DC biasing so that we can set an operating point to it
so once the transistor is biased DC currents flow in the whole circuitry
All the AC signal source are shorts to the DC currents so we employ capacitor for two reasons
1.As capacitor blocks DC and allows AC it is connected for not moving the DC operating point of the transistor and making it fixed since if any small DC part arises in the signal it leads to the change of operating point and our amplification procees gets affected
2.To block the already present DC currents in the circuitry for not getting away and making it fixed
What is the purpose of a DSP processor?
A DSP processor is otherwise known as a digital signal processor, whose role is to convert analogue signals by reading them by measuring, filtering and compressing them. This stream of features are known as algorithms, when mathematical operations have to be quickly performed.
Tunnel diodes are used on very High frequency and fabricated using degenerated semiconductor GaAs.When it got positive potential to anode and negative to cathode the current passing through it increases up to Ip peak value after that the majority carriers on n side does not come to p side because the valance level of n side rise up . after that current reduces up to valley value and after that if you further increase forward voltage it behave like ordinary p-n diode and current will increase according to voltage(Non- linearly) . It is invented by L. Esaki and sometime called esaki diode and they were get Nobel Prize for this tremendous invention.
Bluetooth actually requires several chips and some discrete parts. It also requires a software driver to control those chips. You will also have to have your gadget tested for compliance with FCC Part 15 rules.
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
How can you check if 50 mega ohms resistor is open?
use a merger tester, if there are no indication to certain number of ohmic (50 M), that is mean resistor is open.
if we remove a resistor from the parallel connection the effective resistance value will be increased.
Where does the energy of a charged capacitor reside?
In the electric field inside the dielectric (or insulating) medium separating the two plates
What diodes are called catching diodes?
It's a diode that is used to limit a voltage to some desired value. Importantly, it's used to limit a transient voltage or an alternative voltage.
The simplest example is that diode placed across a relay's inductive coil.
As current is cut off through the coil, a large induced voltage appears that can cause damage to the circuit.
A diode can be placed in circuit to catch/damp the induced voltage.
Why does series rlc circuit provides voltage magnification at resonance?
IN A SERIES RLC CIRCUIT XL=XC.THEREFORE, IMPEDANCE Z IS MINIMUM AND Z=R.SINCE THE IMPEDANCE IS MINIMUM,CURRENT IN THE CIRCUIT WILL BE MAXIMUM. XL=XC MULTIPLYING BY MAX. CURRENT Io (AT RESONANCE) ON BOTH SIDES, WE GET, IoXL=IoXC I.E. Vlo=Vlc(POTENTIAL DIFFERENCE ACROSS INDUCTANCE IS EQUAL TO THE POTENTIAL DIFFERENCE ACROSS CAPACITANCE AND BEING EQUAL AND OPPOSITE THEY CANCEL EACH OTHER.)SINCE Io IS MAXIMUM,Vlo AND Vco WILL ALSO BE MAXIMUM.THUS,VOLTAGE MAGNIFICATION TAKES PLACE DURING RESONANCE.HENCE,IT IS ALSO REFERRED TO AS VOLTAGE MAGNIFICATION CIRCUIT.
