Birthday Treasure hunt with a "robot guide"

Every birthday, my daughter asks for a treasure hunt and each year, they seem to get more and more elaborate. This year, we made an electronic “guide”. This little Acorn shaped robot head is missing all the parts of his face, and she needed to find each of them somewhere in the backyard. When she inserted a new found eye or nose, the controller would move on to the next clue to help her find the next piece. Once she put the face all together, a servo opened a door at the side of the head and she retrieved the “golden acorn”. Oh and yes, there was a backstory that made it all make sense.

Each part was made of something I found in the workshop that could be wired up to act like a switch.

  • Old VGA connector for the right eye
  • Reed switch and magnet embedded in the back of the left eye
  • scrounged AC plug for the nose
  • brass thumb tacks and some conductive tape (behind the moustache)
  • an old phone connector for the right ear

The left ear was a 3d printed lock with the lasered “key” which closed an internal switch.

Design Fusion 360
Coded in CircuitPython for the Adafruit CLUE you see in the picture
3d Print was done on Zortrax m200 (a great printer!)
And of course my Glowforge

It took a good deal of 3d printing than laser cutting, but I thought this group might find it interesting!

Definitely looks more friendly once his face is put back together:

At the end, the servo unlocked the door, she pulled the ear and found the golden acorn

With a view of what it looks like on the inside:

The controller and screen was an Adafruit CLUE board with a microbit slot connector. The code used a finite state machine to guide the screens one to the next. The servo was a standard hobby servo.

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Sheesh, I have no words for how cool that is!

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What a wonderful tradition! Loved hearing how you made it.

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This appeals to my inner nerd child. Love it!

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Speechless!..except, will you come over for my next birthday?

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That is all so cool. Is your daughter developing an interest in electronics or programming ?

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Adopt me.

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Yeah, I’d like to play with that too! :smile:

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HOLY SMOKES.

that elevates the pressure quite a bit. luckily both my girls 14/18 just had their birthdays.

so I have some time. LOL

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well either that or golden acorns. it will be interesting to see the answer.

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That’s some dedication. Neato!

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That is all so cool. Is your daughter developing an interest in electronics or programming ?*

She has certainly developed a passion for hot glue.

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OMG, my younger daughter LOVES her hot glue gun.

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I have a friend who just finished writing an Oz based D&D world - I totally sent her this because this looks straight out of Oz! Even not knowing what the acorn was for, that particularly makes it for me :smiley:

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WOW! Amazing. She had to be amazed by this. As you mention getting more elaborate every year, you have to up your game further next year! Technology and art combined!

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Gosh, what a great project! You definitely win the forum innovation award for today.

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An Oz based D&D world sounds spectacular. And this would be right at home there!

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Wow. Now I feel like a slacker! Seriously, though, that’s a really cool birthday hunt.

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This is awesome! Love it

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Glad all my children are up up and away, so they will not be disappointed in not having had one of these.

Lot of work put into that, but the smiles are always worth it.
Great job…

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