DrawBot – The Face Palm

Okay.  Confession time.

First, if you have been following along at home, I’m sorry – I have been leading you on a fool’s quest.  I did warn you at the outset I had no idea what the hell I was doing.  Carry on, don’t worry about me, I’ll go down with this ship.

Second, here’s the actual confession.  Despite amazingly detailed directions from Adafruit’s website, I soldered the Adafruit Motor/Stepper/Servo Shield for Arduino Kit v1.0 totally totally wrong.  I soldered one of the L293D chips into the location for the 74HC595N integrated circuit chip.  And I wondered why it didn’t work.

This would completely explain why the shield made a pop noise, why there was the smell of burning, and why one of the L293D chips (which was not an L293D chip AT ALL) was getting super hot while the other was just fine.  I just tried to de-solder the L293D chip, but that’s not going to work.  I’ve de-soldered a part before, but surface mount parts are MUCH easier to de-solder. 1

At this point my choices are, from wisest to most foolish:

  1. Abandon all hope and prayer of building a DrawBot.  Power down my laptop, unplug my router, take the battery out of my phone and stop inflicting my delirium on the world.
  2. Order another Adafruit Motor/Stepper/Servo Shield for Arduino Kit v1.0, and start again. 2
  3. Keep trying to de-solder that damned L293D chip, hope and pray I didn’t destroy both the L293D and the 74HC595N, then try to put them in their proper spots.
  4. Damn the torpedoes!  Full speed ahead!  Who cares that one sad little chip refuses to act like another sad little chip?!  More power and brute force will carry the day.  If I cannot make this work, I will ride this project straight into HELL!  Mu-ah-ha-ha!!!3

I’ve taken a stab at desoldering the L293D, but it just isn’t working.  The solder isn’t really coming out.  Even if it does, I’m going to have one hellishly ugly board by the end of the day – and I’ve probably already burned out the L293D and/or the 74HC595N.

At this point, I think I’ll opt for #2 above.

Posts in the DrawBot Adventure Series
  1. Wanna make a DrawBot?
  2. DrawBot Resources and Links
  3. DrawBot, the Adventure Begins
  4. DrawBots for the slow learner
  5. DrawBot - Parts Ordered!!!
  6. DrawBot - The Breakdown
  7. DrawBot - Parts Shipped!!!
  8. DrawBot - What would you draw?
  9. DrawBot - The Plan!
  10. DrawBot - The Hacks
  11. DrawBot - Giant Unicorn?
  12. DrawBot - The Delivery?
  13. DrawBot - The Delivery, Part II
  14. DrawBot – The Delivery, Part III
  15. DrawBot – The Assembly, Part I
  16. DrawBot – The Software, Part I (and an existential conversation)
  17. DrawBot – The Delivery, Part IV
  18. DrawBot – The Assembly, Part II
  19. DrawBot – The Assembly, Part III
  20. DrawBot – The Assembly, Part IV
  21. DrawBot – Design Considerations
  22. DrawBot – Halp!!! No - seriously, a little help?
  23. DrawBot – The Face Palm
  24. DrawBot – The Delivery, Part V
  25. DrawBot – The Silver Lining of Failure
  26. DrawBot – The Delivery, Part VI
  27. DrawBot – The Assembly, Part V
  28. DrawBot – The Assembly, Part VI
  29. DrawBot – Printed Parts
  30. DrawBot – The Assembly, Part VII
  31. DrawBot – The Operation, Part I
  32. DrawBot – The Assembly, Part VIII
  33. DrawBot – The Breakdown, Part II
  34. DrawBot – Printing!
  35. DrawBot – Printing, Part II
  36. DrawBot – Why are you crying?
  37. DrawBot – Calibration
  38. DrawBot – Pen Selection
  39. DrawBot – How to Recover from a Stalled Print!
  40. DrawBot – Drawing Success(ish)!!!
  41. DrawBot – Pen Selection, Part II
  42. DrawBot – Onwards and Upwards!
  43. DrawBot – Another Successful(ish) Drawing!, and an Update
  44. Restarting a Stalled DrawBot Drawing
  45. TSP FTW!
  46. Speedier DrawBot Drawings
  47. Two new DrawBot links! And an update!
  48. Excellent DrawBot Slides
  49. Another Drawing Robot!!!
  50. DrawBot Practice Tip: A Watched Pot
  51. The biggest inkjet printer ever
  52. Why do DrawBots draw on walls?
  53. Maze Code + Polargraph?
  54. All New Polargraph on the way!!!
  55. Ideas for improving my DrawBot
  56. DrawBot Aesthetic Re-Design Ideas
  57. The Eagle Has Landed
  58. Every Body Needs a Skull
  59. I think I know what I want to draw next...
  60. This project is not going to overengineer itself
  61. Overengineered Spools
  62. Overengineered Stepper Motor Mounts, Filament Guides
  63. Overengineered Bolt Endcaps, Case Holder
  64. Sourcing DrawBot Parts
  65. DrawBot - A Tour!
  66. DrawBot - A Preview
  67. Arduino Powered Drawing Robot Poll
  68. Building an Arduino Drawing Robot - On The Cheap
  69. DrawBot - Printed Parts Tour
  70. Unidentified Foam Object
  71. Arduino Powered Drawing Robot - Take 2 (Or 3)
  72. DrawBot, now ACTUALLY wall mounted!
  73. A Study of Drawing Robot Pen Holders and Design Considerations
  74. Drawing Robot Pen Holders, Calligraphy Pens, and Thought Experiments
  75. Ideal Qualities in a Drawing Robot Pen Holder
  76. Enough talk! Finally a pen holder!
  77. DrawBot Pen Holder Post Mortem
  78. To Maker Faire!!!
  79. Skipping! How could I forget the skipping?!
  80. Drawing Robot Penmanship
  81. PlotterBot at Maker Faire Bay Area 2013!
  82. PlotterBot.com - a new site dedicated to drawing robots
  1. Score one for SMT, eh? []
  2. It’s a nice day to start again. []
  3. The world is ours, let’s use it up. []

8 Responses to “DrawBot – The Face Palm”

  1. ted stockwell says:

    I confess – I too have a box of electronic kits that I have destroyed :-). I vote for #2!

  2. kongorilla says:

    A good clear mistake is better than a mysterious one.

    I’d buy a new kit, and sometime in the future, when buying electronic parts, add an L293D and 74HC595N to the order (and a good solder sucker if you don’t have one) and try to save the old shield. You could also take the shield to Maker Faire in May and a nice person at the “learn how to solder” tables could train you to suck solder like a master.

  3. MakerBlock says:

    @Kongorilla: That is an excellent idea! I’ll do that!

  4. [...] Assembly, Part IVDrawBot – Design ConsiderationsDrawBot – Halp!!! No – seriously, a little help?DrawBot – The Face PalmDrawBot – The Delivery, Part V Option #2, recall? [↩] No Comments [...]

  5. [...] time with all the bits in the correct places.  The Adafruit directions are incredibly detailed, I just soldered a few parts in wrong like an idiot last time. This time it went much smoother and much [...]

  6. [...] DrawBot – The Face Palm [...]

  7. Paul says:

    I know this post was long time ago, but did you even get those dead parts desoldered and replaced?

  8. MakerBlock says:

    @Paul: In the end I just ordered a new board. I couldn’t get the chip desoldered without destroying the traces. :/

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