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. DrawBot Resources and Links
  2. DrawBot, the Adventure Begins
  3. DrawBots for the slow learner
  4. DrawBot - Parts Ordered!!!
  5. DrawBot - The Breakdown
  6. DrawBot - What would you draw?
  7. DrawBot - The Hacks
  8. DrawBot - The Delivery?
  9. DrawBot - The Delivery, Part II
  10. DrawBot – The Delivery, Part III
  11. DrawBot – The Software, Part I (and an existential conversation)
  12. DrawBot – The Delivery, Part IV
  13. DrawBot – The Assembly, Part II
  14. DrawBot – The Assembly, Part III
  15. DrawBot – Design Considerations
  16. DrawBot – Halp!!! No - seriously, a little help?
  17. DrawBot – The Face Palm
  18. DrawBot – The Delivery, Part V
  19. DrawBot – The Silver Lining of Failure
  20. DrawBot – The Delivery, Part VI
  21. DrawBot – The Assembly, Part V
  22. DrawBot – The Assembly, Part VI
  23. DrawBot – Printed Parts
  24. DrawBot – The Assembly, Part VII
  25. DrawBot – The Assembly, Part VIII
  26. DrawBot – The Breakdown, Part II
  27. DrawBot – Printing!
  28. DrawBot – Printing, Part II
  29. DrawBot – Why are you crying?
  30. DrawBot – Calibration
  31. DrawBot – Pen Selection
  32. DrawBot – How to Recover from a Stalled Print!
  33. DrawBot – Drawing Success(ish)!!!
  34. DrawBot – Pen Selection, Part II
  35. DrawBot – Onwards and Upwards!
  36. DrawBot – Another Successful(ish) Drawing!, and an Update
  37. Restarting a Stalled DrawBot Drawing
  38. TSP FTW!
  39. Speedier DrawBot Drawings
  40. Two new DrawBot links! And an update!
  41. DrawBot Practice Tip: A Watched Pot
  42. The biggest inkjet printer ever
  43. Why do DrawBots draw on walls?
  44. Maze Code + Polargraph?
  45. All New Polargraph on the way!!!
  46. Ideas for improving my DrawBot
  47. Every Body Needs a Skull
  48. This project is not going to overengineer itself
  49. Overengineered Spools
  50. Sourcing DrawBot Parts
  51. DrawBot - A Tour!
  52. Arduino Powered Drawing Robot Poll
  53. Building an Arduino Drawing Robot - On The Cheap
  54. DrawBot - Printed Parts Tour
  55. Unidentified Foam Object
  56. Arduino Powered Drawing Robot - Take 2 (Or 3)
  57. DrawBot, now ACTUALLY wall mounted!
  58. A Study of Drawing Robot Pen Holders and Design Considerations
  59. Drawing Robot Pen Holders, Calligraphy Pens, and Thought Experiments
  60. Enough talk! Finally a pen holder!
  61. DrawBot Pen Holder Post Mortem
  62. To Maker Faire!!!
  63. Skipping! How could I forget the skipping?!
  64. Drawing Robot Penmanship
  65. PlotterBot at Maker Faire Bay Area 2013!
  66. 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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