0
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
A wiper motor is a DC motor with two permanent magnets that serves as a field for the motor, arranged around the armature where the power is connected to the commentator of the armature with two brushes, the armature is a set of electro magnetic coils that is each connected to its own two segments in the commentator so that the power is connected to only one coil at a time to generate a magnetic field in the armature, this field will appose the field of the permanent magnet field, where the one field will push the other away and make the motor to turn.
Why AC repels and DC attracts?
AC do not really repels, only thing you have a better chance to get away, because with AC the power is going on and off 50 or 60 times per second where with DC, it is a continues current and if you touch it with the inside of your hand, the mussels in your fingers will close and your hand will grip the object and there is no escape, but if you touch it with the back of your hand and the voltage is not to high, there is a chance to get away. The safest is to stay clear from any DC voltage higher than 32 volt, it can be deadly.
The ability to conduct electricity is a property of?
The ability to conduct electricity is a property of a conductor.
What is the relation between the size of the resistor and its value?
There is no relation between the resistor's ohms value and its size. The power of the resistor can be seen by its size. If the power is too small, the resistor can be destroyed.
What is the effect of temperature on photodiode?
photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise. photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise. photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise.
How can you tell from the IMEI number who is the Vendor?
I recently needed also to match IMEI with the vendor and device type. I found the following webpage where you can enter IMEI and get the device and vendor details at nobbi.com: http://www.nobbi.com/tacquery.php The only disadvantage is that if you need to match lets say more then 20 devices then you have to enter each one by one. Otherwise it is a great site. Good luck!
How does magnetic strip lap timing work at racetracks - automotive?
For In Car / Kart Timing:
Located on the bottom of the car / Kart is a hall effect switch (similar to a reed switch but solid state, more sensitive and quicker to switch). This switch detects the magnetic strip which is fitted into the race track as the car / kart drives over it. This triggers the lap timer on the steering wheel and displays your lap time.
For Circuit Timing:
Each car / kart is fitted with an active RFID chip (transponder) which is constantly sending out its unique code over radio for a distance of about 1m. As the car / kart drives over the timing loop, the loop reads the unique code and tells the main timing system to trigger for that car / kart. In most profesional races the position of the transponder is regulated to ensure no advantage is gained by mounting it as far forward as possible. Some motorsports i.e. F1 demand more than 1 transponder in case of failure.
What is the definition of commutator?
A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines.
What is The unit of a computer that does the actual computing or processing?
The actual computing is done on a Random Access Memory (RAM) chips under the control of a ROM (Read-only memory) chip. Collectively these are described as the Central Processing Unit (CPU)
How do you calculate the peak-to-peak value of a sine wave?
All AC voltages and currents are quoted as root-mean-square (rms) values where, for a sinusoidal waveform, the rms value is 0.707 Vmax or 0.707 Imax.
From this, you can determine the value of the amplitude Vmax or Imax:
Vmax = Vrms/0.707 or Imax = Irms/0.707
Once you know the value of the amplitude (Vmax or Imax), simply double it to determine the peak-to-peak value.
Answer: If your receiver have three decoders build in you can set the code differently, if it only have one decoder you set the dip switches on the sensors the same as the receiver, but then the receiver won't be able to identify the sensors, it won't be able to tell what sensor send the signal. This problem can be solved by using a micro processor system like the Multi Zone from Micro Developments that can identify 65535 different sensors and there is no dip switches to set each sensors code and ID is pre programmed on the sensor
What resistor makes 10v into 5v?
You can't use one resistor to bring a voltage down, you have to use two in series in a voltage divider configuration, that is two resistors of the same value in serie between positive and negative, then you will have 5V between negative and the point between the resistors, any value can be used depending on the current jou are going to draw, note: you can not use to small a value at least 1K or up, if the value is to small the resistor will get to hot and it can burn out or it can burn your power supply or you can simply use a 7805 voltage regulator chip, it is inexpensive and easy to use, it only have 3 pins 1 = input, 2=GND and 3 is your output, one can get it in many deferent voltages 7803,7805, 7808, 7812 etc. Note: you can even adjust the output voltage between 5V and the RMS value of your power supply, by connecting a pot between GND and the center pin of the regulator, a smoothing cap is needed between GND and the input and one between GND and the output 1 to 10 mf 16V
What is neutral shift how is it neccesarry?
Neutral shift describes the phenomenon that happens when an AC motor drive shifts the neutral point of the motor. This is important because it can significantly interfere with the motor's ability to function if proper precautions aren't taken care of.
Design a synchronous 4-bit binary counter?
http://ftp.csci.csusb.edu/schubert/tutorials/csci310/f03/dw4bit.pdf
What is clipper in electronic devices and circuit?
clipper is an AC application of diode. The Clipper clipps off a portion of the input signal waveform without distorting the remaining part of the alternating waveform. We can use different type of alternating waveforms as input such as sinusoidal, Triangular, square etc. There are different types of clippers e.g. series clipper, parallel clipper etc. but the method for solving all the type of circuits are same. So there is no need to remember the procedure for one particular clipper circuit. There are different types of clippers e.g. series clipper, parallel clipper etc. but the method for solving all the type of circuits are same. Now let us discuss the procedure with the help of a problem. Suppose we have given a clipper circuit shown below: Because clipper is an AC application of diode. So we apply an AC signal at the input Vi. Our aim is to find out the waveform of Vo. The solution steps are: Step 1 : First of all analyze the circuit by bifurcating the input waveform in positive half cycle and negative half cycle.
Step 1.1 : Positive half cycle : Positive half cycle is equivalent to a battery of positive polarity and variable potential.
Step 1.2 : Negative half cycle : Negative half cycle is equivalent to a battery of negative polarity and variable potential. Step 2 : Now analyze the circuit with positive half cycle.
The next step is to check the condition of diode i.e., whether the diode is forward bias or reverse bias.
In the circuit shown above it is clear that the diode is forward bias and hence equivalent to short circuit (because it is ideal diode).
Now analyze the variation of Vo.
It is clear that And because Vi varies sinusoidally, so Vo also varies sinusoidally. Step 3 : Now analyze the circuit with negative half cycle The next step is to check the condition of diode i.e., whether the diode is forward bias or reverse bias.
In the circuit shown above it is clear that the diode is reverse bias and hence equivalent to open circuit (because it is ideal diode).
Now analyze the variation of Vo.
It is clear that Step 4: Now combine these two waveform.
What makes a device an ergonomic device?
when it is "designed for safe and comfortable interaction between human beings and machines."
Ergonomic means just this:
What is the shortest period of time?
The smallest time increment of time is the Planck time, 10-42 seconds (which I think is 10 to the million, million, million, million, million, million, millionth of a second). It is the time that light takes to travel the smallest measurable distance. Also see, http://www.khouse.org/articles/1997/23/
What are the reasons traffic lights are used?
1] To regulate the flow of traffic
2] To separate traffic flows that are prone to collide with one another thus preventing or minimising such occurrence.
How do you make a photon cannon?
To make a Photon Cannon, one must first understand what a photon is. A photon is a light particle, plain and simple. A Photon cannon would be something that shoots out photons, like a strong flashlight or a laser pointer. By combining two mitheral hammers that cost 1610 gold in the game dota on warcraft 3 plus and extra 1200 gold for the recipie and this creates a stygien desolator which is more commonly known as the photon cannon and normally results in gg(good game).
What is the quartz technology of a watch?
A quartz crystal can be induced by an electrical current to vibrate. This property is used to provide a signal to drive the mechanism of a watch. The frequency of the vibration can be set by the correct cutting of the crystal's size and shape, and is highly accurate and stable. By choosing the appropriate frequency of the crystal [usually in the hundreds of thousands of cycles per second [measured as 'hertz'] and dividing this frequency down to one per second a signal can be made to drive a motor or electronic display etc. once per second with great accuracy.
