This is the beetle robot instructables revisited a la MythBusters style!
I originally made a instructables about my beetle robot version 1.

It is now time to show you a new version of this wonderful robot. This new version is much easier to build and fool proof!

The beetle robot (Beetle bot), is a very simple and efficient robot that use no electronics component to avoid obstacle in his path. It use two SPDT switch to avoid obstacles by reversing the opposite motor to pivote and free himself. There is no silicon chip, that is, no integrated circuit, no transistor, no resistor, capacitor, etc.
This mean very cheap to build!

The major modification is the cross antenna. When you have cross antenna, obstacles like a chair leg won't be any danger to the robot. The robot will be able to avoid it. On the original design, the antennas where in a V shape and the chair leg would go right in the middle of the V and the robot would had a hard time to get free.

By having the cross antenna, it also help with the assembly of the robot. The switch are closer together which help in the soldering of the wires.

Here is a little resume turn into a video. Check it out!

This article was created because I got contacted by a Make editor. I then took pictures and redid the beetle for an article that I wrote in the MAKE magazine Volume 12.

After a few month I saw this: Top articles in MAKE 1 - 12.

It turns out, that my article was one of the most read of there digital magazine!
Here is the digital version of my article.

I took 134 pictures, that is 235Mb of files! I had a really hard time to choose the perfect pictures to make this instructable!

In 2010 I made a internship at www.solarbotics.com and made this solderless kit
Look at blue and the green beetle bot in the pictures! They look awesome!
The only thing you need is a screwdriver that we give in the kit!

Thank you!

Jerome Demers

Step 1: The BeetleBot V2 ( Revisited ) - the Component List

This is what you will need to build this robot.

Items for the robot:
2 x 1,5V motors
2 x SPDT ( single pole double throw ) switches with a metal lever
2 x AA or AAA battery
2 x Terminal connector ( see picture )
1 x AA or AAA battery holder
1 x Plastic or wooden pearl ( Spherical bead )
1 x 1 inch x 3 inch piece of metal or aluminum
1 x Toggle switch for the on/off switchs

Paper clips big and small
2 feets of wires around 22/24 Gauge size
Heat shrink that will fit over the motor shaft and some that will fit over the terminal connector
Electric tape and masking tape

Items for the body shell :
Round plastic lid to make the shell of the robot
Some spray can paint, the colour you want.
Clear varnish
Autobody filler putty or epoxy glue
2 x Small magnets to attach shell to body.

You need some 1,5Volts motor, not 3V or no event 12V!!
Each motors are powered by a single AA battery. You will drain your battery if you use a bigger motor. You can find them in toys or even at your local dollarrama, in little car, fans, etc! ( beware, they might really suck you battery down )

the recommended tools for this project:
1 x safety glasses!!
1 x soldering iron
1 x glue gun
1 x wire strippers
1 x side cutter
1 x scissors, knife, x-acto, etc

I recommend you to take the time to read this entire instructable before starting. In every page I have added a lot of pictures, so don't forget to look.

<p>cool dude!</p>
<p>Hi im doing this in school any tips to help me make it without destroying everything. </p>
<p>hi, you can search youtube for tips on soldering. Don't apply to much heat (or leave your soldering tip too long on component). Don't &quot;paint&quot; or rub solder/soldering iron on parts. You're not Picasso. (I see too many kids do that!) If you're not comfortable doing something, try it on some scrap parts laying around. Be patient and have fun! and if you don't understand something, just ask for explanation or come here to ask me :P</p>
<p>Really well done.</p>
<p>hey man....need a little help; i found a 4 slot AAA battery holder, can you please help me out in the third connection in this battery holder</p>
<p>hey man....need a little help; i found a 4 slot AAA battery holder, can you please help me out in the third connection in this battery holder</p>
I made the bot and it works great! I thank you for your amazing schematics and efforts! <br><br>But i still have trouble understanding the 'third connection' !!! Can you please enlighten me?! <br>Thank you.
<p>nice work, that thing must go super fast with those big wheels!<br>The third connection is a point in the circuit that let the motor current go in either the left batterie or the right batterie depending of the switch status. This makes the motor spin clock wise or counter clock wise depending of the path it takes.</p>
<p>I did it with a friend! We got succesfull at first attempt! Thank you very much for sharing.</p><p>But I have a question, did you pattented it? Is it legal for someone to sell it? Not because I want to do it, but because I found this post on &quot;mercadolibre&quot; </p><p><a href="http://articulo.mercadolibre.com.mx/MLM-560352092-kit-para-armar-robot-bug-detector-de-obstaculos-_JM" rel="nofollow">http://articulo.mercadolibre.com.mx/MLM-560352092-...</a></p><p>(You have to be registered to see the link, I think so)</p><p>Sorry for my english, I'm from M&eacute;xico</p><p>Greetings!</p>
hey man! <br><br>I am happy you got this working!<br>thanks for the info about that robot kit.<br>I was not aware.<br>I got use to people using/copying my work without credit. I have seen a lot of them!<br><br>take care and keep making robots!!
<p>Can it work without the terminal connectors. if i solder the antlers to the metal levers of the SPDT switch ? Please reply fast....</p><p>Tarun</p>
<p>no, it's super hard to solder to those terminal. Give it a try. Use a file to scratch the surface to make it easy to solder. Use flux. Goodluck!</p>
<p>its ok one spdt switch can function it or no... pls </p><p>reply.....ned help..</p>
<p>We made 30 of these robots as a first run in a workshop for children aged 5 and 6.<br>They went absolutely crazy about it.</p><p>here is the video: <iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/0JWMIaXLe2Q" width="500"></iframe><br>(it is in portuguese, turn on closed caption for the english subtitles)</p>
WOW!!!!!!!!!! thank you very much for sharing this to me!! I am super happy! This was my initial goal when I made that robot in 1999 for my science fair. To teach people about robotics. You guys did a amazing job, say BIG thanks to your team! The video is beautiful! Thank you!!
<p>Thanks a bunch for your positive feedback! We plan on making it even better and trying it out with older children as well. <br>I am just finding out about BEAM robotics and I'm amazed at the educational potential it holds!</p>
<p>Made it. At first try the bug went in reverse til I reversed the polarity on the motors. You really need to revise the way the motors should be orientated.</p>
<p>you mean step #6 is not clear?</p>
I built it the way all the pictures say. The bot goes backwards first then when you touch the attanas it goes forward. And suggestions?
Hello Andrea,<br><br>I will not give you the direct answer... maybe :)<br>You robot is functional, you only need to do one thing to make it work 100%.<br><br>A electric motor can go in two direction. Forward and backward.<br>How do you make a motor go forward? The only thing we have in our circuit is a battery and a switch. Let say we only use the batterie and the motors. How can I change the direction of the motor?<br><br>On your any batteries (cylindrical AA in our case) there is a positive (+) and a minus (-). There is a convention saying that the electricity flows from the positive (+) to the minus (-) in any electric circuit. The electricity comes out of the positive (+) and start going through the circuit then it goes back to the minus (-). If you swap the polarity of your motor, the electricity still flow from the positive to the minus of the battery BUT it's inside the motor that is in reverse. So the motor spin the opposite direction! You simply swap/change/invert the wiring of the motors leads of both motors to make the motor spin the other way around. If you do that in your beetlebot it will go forward. This will also fix the issue when you press the swtich and the motor will go backward.<br><br>You have to do both motors. If you do one, well one side goes forward and the other side goes backward. It will spin really really fast!<br><br>good luck and let me know if that works!<br><br>byebye
The flow of electricity from the battery goes from negative to positive not positive to negative.
<p>I have made the thing as instructed.Kindly check the first picture.</p><p>While mentioning any suggestions,kindly specify with respect to SPDT 1 or SPDT 2.</p><p>Both batteries are working but not the robot.</p><p>On pressing the lever at SPDT 1,motor 1 is rotating.</p><p>Is the battery holder in the picture alright?How can I draw the wire from the back part?</p><p>Kindly help me.</p>
<p>These are attempts of the beetle bot.</p><p>Is that battery appropriate ?</p><p>On touching the red and black wires of the battery to the NC and NO of the SPDT switch,no current passes although the battery is perfectly fine.</p><p>Where am I going wrong ?</p><p>Is there anything wrong with the connections.</p><p>Kindly help me.</p>
<p>you can not make this projet work with a single batterie. You need two 9V or two 1.5V batteries.</p>
<p>Are the connections all right.</p>
<p>You will burn your motors if you use 9V batterie. This is what you need to do.<br>You shoud use AA batterie holder instead of 9V</p>
Thank you
I have made the thing.But my robot is not moving forward but is moving in circles.What should I do?Please help me.
Great Instructible! Amazing graphics.
<p>guys plz help I made it the same way as instructed but my robot does not move front when on but when the SPDT are clicked the corresponding motors work perfectly plz help</p>
Your problem is the &quot;third&quot; connection. You are not providing voltage to your motors when the SPDT are not activated. Make sure you have a good connection inside the batterie holder (the junction of the two batteries).<br><br>good luck
<p>Hi, i need help to search switch SPDT. I check in mouse but there is no plate for connect. I check in printer too but nothing.</p><p>Where is switch SPDT located in VCR?</p><p>thank</p><p>Christine</p>
hello<br><br>in a mouse, you have to desolder the switch from the green (PCB) board. You apply heat to the pads and pull on the switch.<br><br>You can find switch in a VCR but it depends of the type and date of VCR.<br><br>you can also buy them online, it's cheap and digikey ships superfast (8$ shipping) cheap<br>http://www.digikey.ca/product-detail/en/MS0850502F030P1A/EG5141-ND/1628122<br><br><br>or here<br>https://solarbotics.com/product/swt9/<br><br>good luck Christine!<br>
<p>i have the same prob as armars has</p>
i put both of the batterys in and the motors don't spin at all. however, when I press the spdts the cooresponding motor spins. HELP PLEASE!!!!
Try reversing your battery connections. This should work
<p>I didnot get u plz can u explain</p>
<p>thx man i already made it :) but mine is different :) its look like this i didnt picture the true one</p>
I built the bettle bot the same way as the pictures. It goes in reverse. When you touch the attanas it goes forward. Can I change and connections to change this?
I am a 14 yrs old child and i just loved this robot i even am making it now so thank you sir whi made this beautiful robot.
<p>Dear 14-yrs-old-child-now-15-yrs-old-child,</p><p>Plenty stupid to post you're a fourteen year old.</p><p>Sincerely,</p><p>An adult who doesn't want somebody to kidnap you. </p>
I have built the robot but it doesnt move very fast. Not like in the video. It doesn't hit the switches hard enough to activate them. But they work because if I hit them with my finger it changes direction. The motors I am using are allelectronics DCM-409 which are 1.5-6v motors and I am using 2 AA batteries.
<p>cmwils,</p><p>This could be a result of touching components. With experience in this area I reccomend trying to seperate anything electrical that is touching.</p>
Dude, sorry for the late reply, but check on your switch. Is it flexible enough? Maybe it's a little too rough and hard?
Check out my instructable: <br>https://www.instructables.com/id/Fixing-Your-Beetle-Bot/
<p>I have created something similar to this using the same axis power motor. To make a long story short it is a much taller, bird like version of this.</p>
<p>I have created something similar to this using the same axis power motor. To make a long story short it is a much taller, bird like version of this.</p>
<p>Where can i get SPDT switches</p>
<p>can i use super glue?</p>

About This Instructable



Bio: I am a French Canadian that loves robots and embedded electronics. I work on all kinds of cool projects, like a high-power electric push scooter ... More »
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