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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 Given the following bridge circuit for a strain gauge, determine the value of the strain gauge resistance {RS}. Let: VIN = 5V R3 = 200 Ω R2 = 50 Ω R1 = 100 Ω a) Under no strain (VOUT = 0 V) R2 ∙ R3 RS= =100 Ω R1 b) When VOUT = 0,5 V {under strain}. 100 200 0,1= − 150 200+ RS 200 200 0,56= =¿> RS= −200=¿> RS=157 Ω 200+ RS 0,56 RS ≈157 Ω
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 - Matlab code: 33*exp(4600*(1/303.15-1/298.15)) = 25.5858 Calculate the Humidity Sensor resistance at relative humidity 70% See the above graphic for the standard resistance: Exercises - Solutions 3
Microcontroller homework Week 05 Question 1. Treshold, sensitivity, range, linearity, accuracy, precision, stability, hysteresis, noise Question 2. Assuming Rh= 9kΩ Vo=0.381V Question 3. A) RS=100 Ω B) RS=212,464 Ω Question 4. A) B) R1 = 16,67 kΩ C) D) E) RF = 10k, RL = 282k, RH = 107k F) Without scaling: 2.35 steps/°C. With scaling: 3.42 steps/°C
Dynamic Range 1 Calibration 2 Bandwidth 5 Processor Throughput 6 Avoiding Excess Speed 7 Other System Considerations 8 Sample Rate and Aliasing 11 2 Digital-to-Analog Converters 13 Analog-to-Digital Converters 15 Types of ADCs 17 Sample and Hold 26 Real Parts 29 Microprocessor Interfacing 30 Serial Interfaces 36 Multichannel ADCs 41 Internal Microcontroller ADCs 41 Codecs 42 Interrupt Rate 43 Dual-Function Pins on Microcontrollers 43 Design Checklist 45 v 3 Sensors 47 Temperature Sensors 47 Optical Sensors 59 CCDs 72 Magnetic Sensors 82 Motion/Acceleration Sensors 86 Strain Gauge 90 4 Time-Based Measurements 93
Two-Stroke TUNER’S HANDBOOK By Gordon Jennings Illustrations by the author Copyright © 1973 by Gordon Jennings Compiled for reprint © 2007 by Ken i PREFACE Many years have passed since Gordon Jennings first published this manual. Its 2007 and although there have been huge technological changes the basics are still the basics. There is a huge interest in vintage snowmobiles and their “simple” two stroke power plants of yesteryear. There is a wealth of knowledge contained in this manual. Let’s journey back to 1973 and read the book that was the two stroke bible of that era. Decades have passed since I hung around with John and Jim. John and I worked for the same corporation and I found a 500 triple Kawasaki for him at a reasonable price. He converted it into a drag bike, modified the engine completely and added mikuni carbs and tuned pipes. John borrowed Jim’s cop
STRUCTURAL TESTING OF HOMEBUILTS Editor's Note: Alex Strojnik's Aviation articles on laminar flow in in all cases of new designs. He writings and aircraft designs have lightplane design, Alex designed also believes load testing may be in appeared in Sport Aviation many and built a very low drag powered order in a number of instances times in the past decade. A native sailplane, the S-2 (Sport Aviation, involving composite airframes. of Yugoslavia, Alex has very April 1982), which would become While there has been no history of impressive academic credentials. the first homebuilt motorglider in structural failure in composite He holds a degree in electrical engi- which International FAI Silver, Gold homebuilts that have been con- neering, a Ph. D. in aerodynamics .. and Diamond badges would be
PRAISE FOR The 4-Hour Workweek "This is a whole new ball game. Highly recommended." --Dr. Stewart D. Friedman, adviser to Jack Welch and former director of the Work/Life Integration Program at the Wharton School, University of Pennsylvania "It's about time this book was written. It is a long-overdue manifesto for the mobile lifestyle, and Tim Ferriss is the ideal ambassador. This will be huge." --Jack Can eld, cocreator of Chicken Soup for the Soul®, 100+ million copies sold "Stunning and amazing. From mini-retirements to outsourcing your life, it's all here. Whether you're a wage slave or a Fortune 500 CEO, this book will change your life!" --Phil Town, New York Times bestselling author of Rule #1 "The 4-Hour Workweek is a new way of solving a very old problem: just how can we work to live and prevent our lives from being all about work? A world of in nite options awaits those who would read this book an
LL URKI Carol Stack I~I ZAPADOCESKA W I,, , ""-,", , ", , , ",,"" UNIVERZITA v Plzni ;Q;3 i 43(194873:9: NENIC MNE! BasicBooks A Subsidiary of Perseus Books, L.L.c. CON,EN,S Dedicated with respect and admiration to my parents, Ruth and Isadore Berman, to my friend Acknowlcdg men ts vii "Huby Banks," and to the other people of The Introduction ix Flats I. The Flats 1 ZapadoCi',,"
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