Hacking the Hexbug Spider XL to Add Computer Vision Using an Android Smartphone
Intro: Hacking the Hexbug Spider XL to Add Computer Vision Using an Android Smartphone
I am a big fan the original Hexbug™ Spider. I have owned over a dozen and hacked them all. Anytime one of my sons goes to a friends’ birthday party, the friend gets a Hexbug™ spider as a gift. I have hacked the original spider to play football (http://youtu.be/h0BTYm1e5u0 ) and follow lines (http://youtu.be/quDHhuEsxEg ). When I saw the Hexbug™ Spider XL at Target™, I immediately wanted to hack a smartphone to it and experiment with computer vision and robotics.
STEP 1: Disassemble the Hexbug Spider
The Hexbug Spider is easily taken apart with a small phillips screwdriver. First remove the batter cover than remove the three screws in and around the battery holder. After the screws are removed, gently lift the top off the spider.
STEP 2: Lift the Head Off the Spider and Remove the Circuit Board
Gently lift the head off the spider and remove the circuit board.
STEP 3: Cut the Battery and Motor Wires at the Board and Strip the Ends
Cut the wires at the point that they connect to the board. There are three sets of wires: one set goes to the battery holder in the head (red/black), another set goes to the top motor, and the third set goes to the bottom motor. One motor has a brown and green wire, the other motor has a brown and black wire as pictured.
Strip approximately 1/4 inch of insulation off the end of all six wires.
Make sure the batteries have been removed from the battery holder.
Strip approximately 1/4 inch of insulation off the end of all six wires.
Make sure the batteries have been removed from the battery holder.
STEP 4: Remove the Plastic Insert in the Spider Head, Pull the Wires Through, and Replace the Head
Use long-nosed pliers to remove the plastic insert in the top of the spider then place top back on the spider and pull wires through hole left by the removed insert. Screw the top back on the spider using the same three screws removed earlier. Note: The motor and battery holder wires (arrow) sticking through the hole in the top made by removing the insert.
STEP 5: Connect the EMGRobotics ADMCB to the Spider Using the Screw Terminals
The EMGRobotics Audio Dual Motor Controller Board (ADMCB) connects to the motors in the Hexbug Spider, the battery holder, and the headphone jack on the Android device. The Android device will control the motors in the Hexbug Spider by sending tones through the headphone jack to the ADMCB. The ADMCB decodes the tones into forward and reverse voltages to the motors. You can learn more about the ADMCB here: http://buildsmartrobots.ning.com/profiles/blogs/the-emgrobotics-audio-dual-motor-controller-board-admcb-use-your-
It's very important that all the wires are connected to the ADMCB EXACTLY as shown. Reversing the connections can either damage the ADMCB or cause the robot to move incorrectly.
Connecting the wires to the ADMCB is easy using the flat head screw terminals. Insert the stripped wires into the holes as shown, and tighten the screw above the hole using a small flat head screwdriver. After tightening, check that no copper wire strands are shorting together.
Double check all your connections and make sure there are no shorts (connections between wires) before inserting batteries.
It's very important that all the wires are connected to the ADMCB EXACTLY as shown. Reversing the connections can either damage the ADMCB or cause the robot to move incorrectly.
Connecting the wires to the ADMCB is easy using the flat head screw terminals. Insert the stripped wires into the holes as shown, and tighten the screw above the hole using a small flat head screwdriver. After tightening, check that no copper wire strands are shorting together.
Double check all your connections and make sure there are no shorts (connections between wires) before inserting batteries.
STEP 6: Use a Rubber Band to Secure the ADMCB to the Hexbug Spider
The following are a hackers best friend: rubber bands, tie wraps, and double sided tape. Use a rubber band to secure the ADMCB to the Hexbug Spider.
STEP 7: Mounting an Android Phone on the HexBug Spider XL - Method #1
Pictured is the simplest method of mounting the an Android phone. Simply drill a hole in the battery cover of the Spider and put through a 3" bolt. I used tie wraps, tie wrap mounts, and double sided tape. The phone is attached using Velcro, put the soft (loop side) on the phone.
STEP 8: Mounting an Android Phone on the HexBug Spider XL - Method #2
I was lucky enough to meet Steven Finkelman at Pumping Station: One in Chicago back in January.
He built a very cool mount for me using a laser cutter.
http://pumpingstationone.org/
i cannot speak highly enough of the people at Pumping Station One. They invited me out there to do a presentation on computer vision back in January and ended up building these great mounts for me.
He built a very cool mount for me using a laser cutter.
http://pumpingstationone.org/
i cannot speak highly enough of the people at Pumping Station One. They invited me out there to do a presentation on computer vision back in January and ended up building these great mounts for me.
STEP 9: Controlling the Robot Using Computer Vision or RFO BASIC
The final robot can be controlled by any application that can generate the appropriate tones (the Spider uses Differential Mode).
You can learn more about using RFO BASIC for Android to control the robot here: http://buildsmartrobots.ning.com/profiles/blogs/building-an-android-basic-programmable-tank-for-less-than-50-00
Or you can download the EMGRobotics Robot Controller directly from Google Play:
https://play.google.com/store/apps/details?id=com.emgrobotics.emgroboticsrobotcontrollerforandroid&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5lbWdyb2JvdGljcy5lbWdyb2JvdGljc3JvYm90Y29udHJvbGxlcmZvcmFuZHJvaWQiXQ..
You can learn more about using RFO BASIC for Android to control the robot here: http://buildsmartrobots.ning.com/profiles/blogs/building-an-android-basic-programmable-tank-for-less-than-50-00
Or you can download the EMGRobotics Robot Controller directly from Google Play:
https://play.google.com/store/apps/details?id=com.emgrobotics.emgroboticsrobotcontrollerforandroid&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5lbWdyb2JvdGljcy5lbWdyb2JvdGljc3JvYm90Y29udHJvbGxlcmZvcmFuZHJvaWQiXQ..
10 Comments
bubbles00 8 years ago
what are some experiments i could try with this
FAZTEX 10 years ago
is very urgent
RFO BASIC the code
thank you
emgrobotics 10 years ago
LoopyMind 11 years ago
Doing the Skype conversion, you could make it 2-way communications.. the controle tones would go over the left-audio and the sound over the right, you'd have to use an external speaker I guess since the phone's internal speaker is turned off when you plug in an audio jack... or is it possible to bypass so you don't need an external speaker?
Hmmm you'd also have to be able to tell the controller app to just use the left channel and Skype to use the left channel ... is that even possible with Android in combination with some soort of app, to fade audio left or right per application? ..
or is it possible to have the controller software and hardware make/listen to tones well outside the human range of hearing... (would freaking pets be a problem?)
triumphman 11 years ago
triumphman 11 years ago
donedirtcheap 11 years ago
AJ_Smoothie 11 years ago
pepehdez 11 years ago
emgrobotics 11 years ago