Netburner EE Challenge Answers & Winners

We thank everyone for participating in the monthly Electrical Engineering Challenge sponsored by NetBurner. Below are the winners for each month’s challenge.


January 2016 Challenge

Answer:

  • Line 20: blur() is an object method; this should be “this.blur()JanCodeAns

Winners:

  • Joffrey Carlier (United Kingdom) — NetBurner module
  • Gordon Margulieux (United States) — CC Digital Subscription

December 2015 Challenge

Answer:

  • The wires to pins 2 and 3 of the DE9 RS-232 connector should be swapped.Challenge 6 - Dec - ans

Winners:

  • Robert Smueles (United States) — NetBurner module
  • Pieter Potgieter (South Africa) — CC Digital Subscription

November 2015 Challenge

Answer:

  • Line 32: Simple typo. pnev should be prevcc_5_ans

Winners:

  • Mark Magness (United States) — NetBurner module
  • Sergiu Carpov (France) — CC Digital Subscription

October 2015 Challenge

Answer:

  • The capacitors on the crystal circuit should be 15 pF. The large capacitors shown there would never get the crystal oscillating.
    October-Challenge-Schem-Answer

Winners:

  • Ben Johnson (United States) — NetBurner module
  • Pieter Potgieter (South Africa) — CC Digital Subscription

September 2015 Challenge

Answer:

  • Line 28 is missing a second open parenthesisNetburner Sept Answer

Winners:

  • John Barraclough (United Kingdom) — NetBurner module
  • Pieter Willemsen (Belgium) — CC Digital Subscription

August 2015 Challenge

Answer:

  • In this half adder, then two AND gates in the middle of the circuit should be NAND gates like the rest of the circuit.SchemChallAnswerAugust

Winners:

  • Adrian Schuur (Germany) — NetBurner module
  • Pete Windmann (Denmark) — CC Digital Subscription

July 2015 Challenge

Answer:

  • Error in line 16. This dup leaves an extra item on the stack in each iteration. It needs to be removed.Error in line 16. This dup leaves an extra item on the stack in each iteration. It needs to be removed.

Winners:

  • Tom Harrison (USA) — NetBurner module
  • Naubert Aparicio (USA) — CC Digital Subscription

June 2015 Challenge

Answer:

  • Transistor Q2 of the Darlington circuit should be an NPN transistor to match Q1.June Challenge Answer

Winners:

  • Steve Barker (USA) — NetBurner module
  • Andreas Hagele (New Zealand) — CC Digital Subscription

May 2015 Challenge

Answer:

  • The commas in line 17 should be semicolonscc_2_ans

Winners:

  • Gordon Margulieux (USA) — NetBurner module
  • Bernie Ramsay (UK) — CC Digital Subscription

April 2015 Challenge

Answer:

  • The flyback diode on the relay coil is backwards.
April 2015 problem

April 2015 problem

Winners:

  • Johan Stodberg (USA) — NetBurner module
  • Alberto Graziani (Italy) — CC Digital Subscription

March 2015 Challenge

Answer:

  • Missing parentheses on argument list on line 54

    March 2015 answer

    March 2015 answer

Winners:

  • Mark Treacy (UK) — NetBurner module
  • Brian Shewan (Canada) — CC Digital Subscription

February 2015 Challenge

Circuit Cellar’s technical editors purposely inserted an error in the schematic below. Find the error and submit your answer via the online Submission Form by the deadline: 2 PM EST on February 20. Circuit Cellar will randomly select 2 prize winners from the pool of respondents who submit the correct answer.

February 2015 problem

 

Answer:

  • The 10-µF capacitor (C1) on the input of the LM7805 is much too small. It should be on the order of 470 µF or larger to minimize ripple.

Winners:

  • Richard Dzioba (Canada) — NetBurner module
  • Murdock Taylor (USA) — CC Digital Subscription