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E2E Challenge Questions and Answers
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Thank you to everyone that played!
We hope you had a great time playing and thanks to the great feedback, we are busy cooking up something new for next year! If you have any comments or suggestions for the next challenge just let me know.
But.... back to this year! I need to announce the winners of the 2 - 100pts prizes: Sudip Choudry and Patrick Mackian! Congrats you two! You'll be seeing the points hit your account very soon.
Now for what you all have been waiting for. I've recieved many requests for the questions and answers for the challenge. (I guess the clues were a bit tough!) I'll put the questions, clues and locations first (just incase you want to take a chance answering the questions) and then at the bottom I'll post the answers.
1. Start at E2E Blog: http://e2e.ti.com/group/helpcentral/b/weblog/archive/2011/11/02/are-you-engineer-enough-for-the-e2e-challenge.aspx
Clue: This is where you can be the star of your own E2E Video. Hit play on the clip that speaks to you.
Location: http://focus.ti.com/general/docs/video/Portal.tsp?categoryid=872771&lang=en (to promote user generated videos)
Question: (Was asked by Ed Fullman, Director of MAVRK Solutions) Who’s law states “The induced electromotive force (EMF) in any closed circuit is equal to the time rate of change of the magnetic flux through the circuit”
2. Clue: You say tomato, I say tomato; It goes the same for TI DSP family and renaissance painter but help me out anyways
Location: http://e2e.ti.com/support/dsp/davinci_digital_media_processors/default.aspx (DaVinci Video Processors Forum)
Question: How is the 32-bit hex value DEADBEEF stored at memory location 0x10000 of the 16-bit little-endian MSP430? How about on a 32-bit big-endian ARM?
3. Clue: A nation over half a century old, but new to us - This is where you get questions answered
Location: http://e2e.ti.com/group/national_questions/default.aspx (National Integration Group)
Question: An MSP430 can run a real-time clock consuming only 600nA at 3V. How many days could it run could it run from 2x 2000mAHr Alkaline AA batteries (assuming no self-discharge and that the battery is unsealable until it’s 100% depleted)?
4. Clue: From many mouths I speak of the drive of phones
Location: http://e2e.ti.com/blogs_/b/mobile_momentum/default.aspx (Mobile Momentum Blog)
Question: Using the units digit of the decimal equivalent of today’s date (11/11/11) in binary as y; which real numbers, a, does the following equation have a unique solution a yx + y-x = y
5. Clue: Quick translations, I speak data. In announcements, I speak in basic terms of digital features
Location: http://e2e.ti.com/support/data_converters/high_speed_data_converters/b/announcements/archive/2011/07/25/get-your-signal-chain-basics-digital-features-in-high-speed-digital-to-analog-converters.aspx (Announcements for High Speed Data Converters)
Question: You are designing a data acquisition system where the tester’s power supply is not accurately calibrated. The specification of the tester indicates it has a rejection ration of 2%/Volt. Your analysis shows five codes were incorrect. What is the accuracy of your system?
(all answers below)
2. Memory Location Value in 16-bit little endian MSP430 Value in 32-bit big endian ARM
10000 EF DE
10001 BE AD
10002 ED BE
10003 DA EF
3. 2000 mAHr / 0.0006 mA / 24 hours = 138,888.89 days
4. a=9/4 or a≤0. (I realized that depending on what browser you were using the formula might have looked like a yx+y-x=y in which case the answer is 1/3)
5. 8 bit. 0.02x2eN=5 so N=8.
Awesome! I cannot wait to see what you are planning!
When is the next challenge? 12.12.12 at 12.12PM?
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