Therefore manufacturer's data sheet specifies the maximum forward current, that diode can withstand. This average current IF is the rate a diode can handle up to the forward direction when used as a rectifier. Another entry of interest in the data sheet is the forward voltade drop UF(max) when the maximum forward current occurs. An usual diode has this value 0.7-2.0V. Diode conducts easily when forward biased. Reverse biasing. The reverse current is a leakage current at the source rated voltage. Typically, silicon diodes have 1-10 microA and germanium 200-700 microA of leakage current. This value includes thermally produced current and surface leakage current. Only these currents take place, when a diode is reverse biased. At breakdown, the diode goes into avalanche where a number of carriers appear suddenly in the depletion layer. With a rectifier diode, breakdown is usually destructive. 4)Typical values: Uknee- approximatly 0.7V; UF 0.7-2.0V; leakage (IR) 1-10 microA/200-
Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa- tion contained in this publication. v vi TABLE OF CONTENTS PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv 1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
spurious signal. 6. Channels – multiple analog signal inputs to the ADC that can be individually selected or selected through a multiplexor. 7. Linearity – Describes how an ADC conveter follows a linear function. 8. Operating temperature – A temperature at which the ADC functions optimally, usually given by the manufacturer. 9. Power dissipation – The proportion of power dissipated (through heat) when the ADC is working. Question 2: An 8 bit ADC has a reference voltage of 5V. What is the digital output code word for an input of 1.2V? 001111012 What is the voltage range corresponding to 1 LSB? 0,0195V Question 3. A 15 bit ADC has a reference voltage of 10V. What is the digital output code word for an input of 6.83V? 101011101101100 Question 4. What is the value of the quantization error between an input voltage of 2.3V and quantized voltage with the output code word equal to 011101012 using an 8 bit ADC with 5V reference? 0.01484375V Question 5
selected. 7. Linearity - relates to how a ADC follows a linear function. All ADCs are to a certain extend nonlinearity. 8. Operating temperature - measurement, which in optimal state for ADC-s, lets them function correctly. 9. Power dissipation - refers to the amount power dissipated when the ADC is operating. Question 2 An 8 bit ADC has a reference voltage of 5V. What is the digital output code word for an input of 1.2V? What is the voltage range corresponding to 1 LSB? 1,2𝑉 0,0195𝑉 = 61 ; 61 = 001111012 Digital output code for an input of 1.2V is 001111012. Voltage range corresponding to 1 LSB is U= 0,0195V. Question 3 A 15 bit ADC has a reference voltage of 10V. What is the digital output code word for an input of 6.83V? 15 bit = 32768 10V/ 32768 = 0,0003 V 6,83V / 0,0003 = 22767 22767 = 01011000 111011112
As the next pair of coils is energized, the rotor advances to the next position. The permanent magnet (PM) stepper has a rotor with alternating north and south. As the coils are energized, the rotor is pulled around. This figure shows a single coil to illustrate the concept, but a realstepper would have stator windings surrounding the rotor. The PM stepper has more torque than an equivalent VR stepper. The hybrid stepper essentially adds teeth to a permanent magnet motor,resulting in better coupling of the magnetic field into the rotor and moreprecise movement. In a hybrid stepper, the rotor is split into two parts, anupper and lower. One half is the north side of the magnet andone is the south. The teeth are offset so that when the teeth of one magnetare lining up with the mating teeth on the stator, the teeth on the other arelining up with the grooves, the tops of the teethare crosshatched for clarity). Some hybrid steppers have more than one
Motherboard - the principle printed circuit board assembly in a computer; includes core logic (chipset), interface sockets and/or slots, and input/output (I/O) ports. Printed circuit board (PCB) - a thin, laminated sheet composed of a series of epoxy resin and copper layers and etched electronic circuits (signal, ground and power) Chipset (or core logic) - two or more integrated circuits which control the interfaces between the system processor, RAM, I/O devises, and adapter cards. Processor slot/socket - the slot or socket used to mount the system processor on the motherboard AGP - Accelerated Graphics Port - a high speed interface for video cards; runs at 1X (66MHz), 2X (133MHz), or 4X (266MHz). PCI - Peripheral Component Interconnect - a high speed interface for video cards, sound cards, network interface cards, and modems; runs at 33MHz. ISA - Industry Standard Architecture - a relatively low speed interface primarily used for
6. Channels relate to the inputs of the ADC can either be multiplexed or individually selected. 7. Linearity relates to how well a ADC follows a linear function. All ADCs are to a certain extend non-linear. 8. All ADC are depended on temperature, operating temperature is defined as the temperature at which the ADC functions correctly. 9. Power dissipation refers to the amount power dissipated when the ADC is operational. Question 2 Output Code = 001111012 Voltage LSB = 0.0195 V Question 3 1010111011011002 Question 4 VE = 0.01484375 V Question 5 13 Bit ADC Question 6 Question 7 A) tU = 400 µs B) td = 1000 µs (1 ms) Question 8 A) -85 dB B) -82 dB C) -84 dB Question 9 A) Sparkle codes / metastability, high power consumption, large size, expensive. B) Speed limited to ~5Msps. May require anti-aliasing filter. C) Slow Conversion rate. High precision external components required to achieve accuracy.
Mitsubishi · · The electromagnetic torque is born in air gap · What kind of drives the majority of drive systems present low accuracy · The induction machines are associated with the names of Dolivo-Dobrovolsky Tesla · One of the first eletrical motors has been built by Jacobi · Electromagnetic efficiency is measured in tesla · Time constants are measured by ms s hours · Who is the author of the first electrical motor Henry · Which rectifier cannot be built without a transformer 3-phase midpoint · Call the benefits of 3-phase rectifiers upon the 1-phase ones output voltage · Which rectifier has more diodes 3-phase bridge · In the case of high-pass filter before the load, what can you tell about the current higher · What is the difference between the construction and operation of a rectifier and an inverter input wave output wave
c. How can the above schem be modified with open sensor detection using
only one ADC and one digital input pin of the microcontroller?
Adding a comparator to Vsense. If Vsense
shifts (origiral, sum, etc.). This includes noises and heating. - If the input frequency comes down and the difference frequency will increases up and may be filtered aways by the low pass filter. - The design of the mixer is complecated. - The circuit may produce more ElectroMagnetic Interference (EMI) Question 4 (10 marks) Consider the following circuit and input waveform. Draw an equivalent output waveform. Solution: Question 5 (20 marks) Consider the following LM231 voltage to frequency converter (see LM331.pdf). Assume Rs = 17 kΩ. Determine the output frequency (fOUT). a) Vin = 0.0836 V b) Vin = 0.418 V c) Vin = 0.836 V Solution: Determine the output frequency (fOUT). From the chart, Rs = 17 kΩ, RL = 100 kΩ, Rt = 6.8 kΩ, Ct = 0.01 µF. a) For Vin = 0.0836 V, fOUT= 100 Hz b) For Vin = 0.418 V, fOUT= 500 Hz c) For Vin = 0.836 V, fOUT= 1kHz Question 6 (10 marks) One of the reasons for using time/frequency based measurements in
oData transparency: In bit and byte oriented protocols, there is a problem if a control character (for ETX (End of Text) ·Same as ETB, only no more blocks will follow. ITB (End of > Differences with HDLC length of protocol field (1B or 2B) byte-oriented protocols) or the start-of-frame flag (for bit-oriented protocols) appears in the actual data
Test VIII - cumulative test by Piigli, Mets, Parker, Kauler "Top delusion" question / answers are red. Test I The induction machines are associated with the names of Dolivo - Dobrovolsky, Tesla. The synchronous machines are associated with the name of Ferraris. The DC machines are associated with the names of Jacobi and Henry. The electromagnetic torque is born in air gap. The torque is proportional to the current in dc motor. Which equations are correct? P = sW; oomega = tuletis fii'st The angular frequency is 2*pi()*n / 60 ja 2*pi()f The motor torque is equal to TL + J * oomega tuletis aja järgi The inductor supplies the motor with flux. The leading companies in the world market of electrical drive engineering are: Mitsubishi. The energy balance is described by energy conservation law. The armature supplies the motor with current. The cheapest and the most reliable is induction motor.
. . . . . . . . . . . . . . . .7 Contact breaker points renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Rear brake shoe lining check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Coolant renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Road test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 Crankcase emission control filter renewal . . . . . . . . . . . . . . . . . . . .35 Roadwheel check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Distributor lubrication - models with contact breaker distributor . .12 Seat belt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Driveshaft check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 Spark plug renewal .
Later (in 2000) Kilby receives Nobel price in physics. Jack Kilby completes building the first integrated circuit, containing five components on a piece of germanium half an inch long and thinner than a toothpick. SAGE -- Semi-Automatic Ground Environment -- linked hundreds of radar stations in the United States and Canada in the first large-scale computer communications network. 1959 Fairchild Semiconductor files a patent application for the planar process for manufacturing transistors. The process makes commercial production of transistors possible and leads to Fairchild's introduction, in two years, of the first integrated circuit. Texas Instruments announces the discovery of the integrated circuit. At Fairchild Semiconductor, Robert Noyce constructs an integrated circuit with components connected by aluminum lines on a silicon-oxide surface layer on a plane of silicon. Fairchild Semiconductor announces their independent discovery of the integrated circuit. 1960
ALEXANDER TARANENKO ANASTASSIJA MOROZOVA Tallinn University of Technology March 2013 INTRODUCTION The following system consists of two Mitsubishi AL2 controllers that control two crossroads, a pedestrian crossing and a parking lot. The following implementation divides the task between the two, but keeps controller one the main one and controller two the secondary one. The system can work in two modes, automatic and manual, the latter of which can also work in two separate sub- modes that must be selected for each crosswalk individually. DESCRIPTION The control system consists of 2 Mitsubishi AL2 controllers
== 8. Y = true for i from 1 to 20 for j from 1 to 8, excluding 3 // first bit is spared (omitted) and the second (third) bit for upper bitindex = j + (i-1)*8 if S1[bitindex] ≠ S2[bitindex] Y = false Exit loop end end end == CPU architecture 9. Suppose a microprocessor adds the numbers shown below respectively. In each instance explain the influence of the computation on the flag register in terms of each of the flag bits Z, N, C, and V. Assume the processor can handle 8-bit binary values using a two’s compliment representation. a) 60 + 80 b) 60 – 80 == The N, Z, C, and V bits are the condition code flags, conditions code flags to be set or cleared (0 or 1). 1. N = 0; Z = 0; C = 0; V = 0 2. N = 0; Z = 1; C = 0; V = 0 3. N = 0; Z = 1; C = 1; V = 0 4. N = 1; Z = 0; C = 0; V = 0 5. N = 0; Z = 0; C = 1; V = 0 6. N = 1; Z = 0; C = 1; V = 0 7. N = 1; Z = 0; C = 0; V = 1 8. N = 0; Z = 0; C = 1; V = 1 9. N = 0; Z = 1; C = 1; V = 1 9. a) V and C b) N
segregated into various spaces. The engine room is one of these spaces, and is generally the largest physical compartment of the machinery space. The engine room houses the vessel's prime mover, usually some variations of a heat engine - diesel engine, gas or steam turbine. On some ships, the machinery space may comprise more than one engine room, such as forward and aft, or port or starboard engine rooms, or may be simply numbered. 1.1)Main engine The engine room of a motor vessel typically contains several engines for different purposes. Main, or propulsion engines are used to turn the ship's propeller and move the ship through the water. They typically burn diesel oil or heavy fuel oil, and may be able to switch between the two. There are many propulsion arrangements for motor vessels, some including multiple engines, propellers, and gearboxes. Large engines drive electrical generators that provide power for the ship's electrical systems.
Õpperühm: IATM Matrikli nr: 050829 Õppejõud: Avo Ots Tallinn 2008 Author's word This project is written to show some interesting aspects of working with VoIP (Voice over Internet Protocol) service. The project briefly describes the process of finding a solution for based VoIP problem and its realization. -2- Contents Introduction .............................................................................................................................. - 4 - Mission....................................................................................................................................... - 5 - Solution..............................................................
Question 1 Name 9 characteristic parameters of sensors. Treshold, noise, range, stability, linearity, accuracy, precision, sensitivity, hysteresis Question 2 Given the circuit below (using a SYH-2R humidity sensor) determine the output voltage for a relative humidity of 70 % at 30 °C if R T = 50 kΩ and VDD= 2.5 V. R70 30 c =R H =9,2 kV RH 9,2 k V O= ∙ V DD= ∙ 2,5 = 0,388 V (R T + R H ) ( 50 k +9,2 k ) Hint: Check specification for Humidity Sensor of SYH-2R.pdf at http://www.rhopointcomponents.com/images/SYH-2R.pdf 2 Week 04 Homework Question 3
a) Why do we require a low-pass filter when using this mixer circuit? Mixer needs more parts b) Name another disadvantage of such a mixer circuit. The mixer approach multiplies the frequency shift you want to measure, but also any other frequency shift. This includes drift caused by component heating, noise, etc. Question 4 Consider the following circuit and input waveform. Question 3 Draw an equivalent output waveform. Question 3 Question 5 Consider the following LM231 voltage to frequency converter (see LM331.pdf). Assume Rs = 17 kΩ. (Hint: Find the formula to calculate the output frequency fOUT and the values of Rs, RL, Rt, and Ct in LM331.pdf). Determine the output frequency (fOUT). a) Vin = 0.0836 V V¿ 0.0836 ∗RS ∗17 k 2,09 V 2,09 ∗1 ∗1 = 100kHz RL 100 k 0,04∗170∗1
of substances in an electric field. Principle of CE devices is very simple and is shown in Fig. 1. Analysis sequence is also very simple. Both ends of the capillary with electrodes immersed in the electrolyte container. The capillary is filled with buffer, to which the sample solution is applied on one side. Then, sample components are separated by an applied voltage, as they move in a buffer at different speeds. Fig. 1: Diagram of capillary electrophoresis system The principle of electrophoresis is strictly obeys Ohm's law. For the electrophoretic separation must be keeped a constant voltage. The buffer is needed to provide an electrolytic
Electrical Drive SENSORLESS DRIVE POWER FLEX (ALLEN BRADLEY) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram 2. Tables of observations Task Operation/Record Observation 1 Reverse the motor speed. How long Time to reverse was 16 does the motor reverse? seconds 2 2: Set the screen display an Output Minimal: 2.8V Voltage of the inverter. Turning the Maximal: 166V potentiometer, find accessible minimal and maximal voltages. Stop the drive. 3 3 Turn the keypad potentiometer half- Reverse time was 7 way counter-clockwise. Run the drive seconds.
Picture 2.7 Energy use by type of building 2.5 Industrial and Manufacturing Energy Use The United States is highly industrialized. Industry accounts for about one-third of the energy used in the country. There are many different uses and a variety of different energy sources in the manufacturing sector. One main use is as boiler fuel, which means producing heat that is transferred to the boiler vessel to generate steam or hot water. Another use is as process heating, which is when energy is used directly to raise the temperature of products in the manufacturing process; examples are separating components of crude oil in petroleum refining, drying paint in automobile manufacturing, and cooking packaged foods. Picture 2.8. Major end uses of some common energy sources In the manufacturing sector, the predominant energy sources are natural gas and electricity (a secondary source)
Question 1 Name 9 characteristic parameters of sensors. Solution: 1. Thershold. 2. Sensitivity. 3. Full Range. 4. Linearity. 5. Accuracy. 6. Precision. 7. Stability. 8. Hysteresis. 9. Noise. Question 2 Given the circuit below (using a SYH-2R humidity sensor) determine the output voltage for a relative humidity of 70 % at 30 °C if RT = 50 kΩ and VDD= 2.5 V. Solution: Check specification for Humidity Sensor of SYH-2R.pdf at: http://www.rhopointcomponents.com/images/SYH-2R.pdf 2 Week 04 Homework - Solutions Check Thermistor - Wikipedia.pdf at http://en.wikipedia.org/wiki/Thermistor Calculate the Humidity Sensor resistance at 30°C T = 273.15°C +30°C = 303.15°C T0 = 273.15°C +25°C = 298.15°C R60% 30°C =25.5858 kΩ
4 billion in 2001. Individual game sales are also increasing: Grand Theft Auto: Vice City from Take Two Interactive sold 1 Games Programming with Java and Java 3D an estimated 3 million copies in its first month of release. This game is likely to become the best selling title of 2002, and of all time. 1.2. Console Hardware Since consoles are so central to gaming, it is interesting to consider their capabilities. The PlayStation 2 processor runs with a clock speed of 294 MHz, has 32Mb of RAM, and a separate graphics chip that can render about 66 million polygons per second. The small amount of RAM is an important constraint upon games wishing to use Java. The introduction of the Xbox changed the game rules (so to speak), with its Pentium III, 64Mb RAM, a 8Gb hard disk, and the ability to render 150-200 million polygons per second. Sony and Microsoft have recently released network adapters for their consoles,
for j from 1 to 8, excluding 3; //first bit is spared (omitted) and the second (third) bit for upper bitindex = j + (i-1) ∗8; if S1[bitindex] =! S2[bitindex]; Y = false; Exit loop; end; end; end; CPU architecture 9. Suppose a microprocessor adds the numbers shown below respectively. In each instance explain the influence of the computation on the flag register in terms of each of the flag bits Z, N, C, and V. Assume the processor can handle 8-bit binary values using a two’s compliment representation. a) 60 + 80 b) 60 – 80 Range from -128 to 127. Equation Result Z N C V Comment 60 + 80 140 0 0 1 1 Produced carry(C) and
helped a lot in the field of communication. The first models of cameras were used in the years before Christ where they were used to see closely objects. After its emergence was marked a before and after in history because thanks to this artefact can capture exact moments in which a event happened. Advancing in history have improved the types of cameras, passing cameras that took several minutes to take a photograph so far in which the process of taking a photograph or several is instantaneous. In addition, the cameras allow us to keep a record of a large number of important events, either of oneself or of important moments for the global history. As the saying goes, "a picture is worth a thousand words" 4 Uses of the Photographic Camera (SEBA) Camera obscura, the first camera was first mentioned by Chinese philosopher Mo-Ti in the 5th century before Christ. He formally recorded the creation of an
as all costs ultimately will make way to the final market place to be reflected in the price paid by the end user. Therefore, the leading edge companies seek to make the supply chain as a hole more competitive through the value it adds and the cost it reduces overall. Thus today the real competition is not the companies against the companies but rather supply chain against supply chain. DEFINITIONS Supply Chain Management (SCM) is the process of planning, implementing, and controlling the operations of the supply chain with the purpose to satisfy customer requirements as efficiently as possible. Supply chain management spans all movement and storage of raw materials, work-in-process inventory, and finished goods from point-of-origin to point-of-consumption. According to the Council of Supply Chain Management Professionals (CSCMP),
Abstract How are 3D and BIM Changing the Design, Fabrication and Construction of Complex Steel Structures? The adoption of three-dimensional (3D) design and construction tools have created a remarkable shift in the building industry. Intelligent 3D technology in the form of Building Information Modeling (BIM) not only promises to improve the notoriously inefficient construction process, but also opens the door for designing new geometric shapes, which until recently have been considered unbuildable. Steel has been extensively used to build some of the most challenging architectural icons of the 21st century, due to its low weight and high strength in both compression and tension. Therefore, the steel design and construction industry has been on the forefront of technical innovation. The purpose of this study is to determine how 3D and BIM are changing the design,
Using of different databases and computer networks make available a great variety of information sources. There are two main types of computers, analog and digital, although the term computer is often used to mean only the digital type, because this type of computer is widely used today. That is why I am going to tell you about digital computers. Everything that a digital computer does is based on one operation: the ability to determine: on or off, high voltage or low voltage or -- in the case of numbers -- 0 or 1 or do-called binary code. The speed at which the computer performs this simple act is called computer speed. Computer speeds are measured in Hertz or cycles per second. A computer with a «clock speed» of 2000 MHz is a fairly representative microcomputer today. It is capable of executing 2000 million discrete operations per second. Nowadays microcomputers can perform from 800 to over 3000 million operations per second and
signal. Channels related to the inputs of the ADC can either be multiplexed or individually selected. Linearity relates to how a ADC follows a linear function. All ADCs are to a certain extend non-linearity. Temperature is measurement, which in optimal state for ADC-s, lets them function correctly. Power dissipation refers to the amount power dissipated when the ADC is operating. 2. The output code is 001111012 and the voltage of the LSB is 0,0195V 3. The output code is 101011101101100 4. The value of the quantization error between an input voltage of 2.3V and quantized voltage with the output code word equal to 01110101 using an 8 bit ADC with 5V reference is 0.01484375V 5. 13 Bit ADC 6. The circuit diagram: 7. The run-up phase takes 400 µs, the run-down phase takes 1 ms. 8. a) MAX1200 pipeline ADC - -85dB
Rail guns could fire projectiles to intercept the incoming missiles. Some scientists argue that rail guns could also protect Earth from rogue asteroids, by firing high- velocity projectiles from orbit. Upon impact, the projectiles would either destroy the incoming asteroid or change its trajectory. 5.3 Fusion reaction initiations Rail guns could also be used to initiate fusion reactions. Fusion occurs when two small atomic nuclei combine together to form a larger nucleus, a process that releases large amounts of energy. Atomic nuclei must be traveling at enormous velocities for this to happen. On the earth, some scientists propose using rail guns to fire pellets of fusible material at each other. The impact of the high-velocity pellets would create immense temperatures and pressures, enabling fusion to 14 occur. Unfortunately current rail guns do not generate sufficient energies to enable nuclear fusion to occur. 5.3
Read Chapter_5_Output_Control_Methods.pdf Question 1 (10 marks) Draw a PID control scheme and write down an equation to describe the PID control. Compare the differences between the “bang-bang“ control and proportional control. What are the functions of Integral and Derivative terms in the PID equation. Solution: Draw a PID control system: (Figure 5.5, page 111) Write down an equation to describe the PID control: (page 111) Compare the differences and the advantages between the “bang-bang“ control and Proportional control: (page 105) “Bang-Bang“ control or ON-OFF control is the simplest control system. It turns ON when the system needs more INPUT and tuns OFF if the system doesn’t need INPUT any more. The INPUT is similar to the PWM square wave (running ON and OFF during the length of the needed INPUT). Bang-Bang control is similar to the PWM input signal
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