Instructables

How to Build a Robot - The BeetleBot

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Welcome!

I have been in robotics since I was a kid and I am very passionate by robotics. I learn BEAM robotics around 1997-98 and started building robots for a science faire project call "Insectroides" in 2001. http://robomaniac.solarbotics.net ( they change server and the website links does not work anymore it is on Linux and it is CASE SeNsiTIve! ) here is the old one
http://members.tripod.com/robomaniac_2001/index.htm

One of my many robots was the beetle robot, a VERY simple robot that can avoid obstacles on the floor without ANY silicon chip! ( the red ladybug, second picture, is my FIRST beetlerobot )
the red ladybug use a home made PCB carve with a dremel and two playstation motors with rubber wheel from a walkman!

- NO PROGRAMMING
- NO ELECTRONIC COMPONENT

It use
2 - motors
2 - SPDT switch
1 - AA battery holder

I has 16 years old when my uncle showed me the principal of the SPDT switch ( Simple Pole Double Throw). I then took this idea and incorporated the design into the (world famous) beetle robot :P

Now I am 22 and want to show you step by step instructions how YOU can make this simple robot!

here are some videos of my beetlerobot in action!

The beetlerobot in the video is made using a Printed Circuit Board ( PCB ).
This design will be use if I make a kit one day!






Check them all out here!
http://www.youtube.com/jeromedemers

This Instructable is divided into three parts

- You will learn how to build the robot
- I will explain how the robot works
- I will then teach you how to fix your robot if it does not work ( Debugging )

Don't forget to read the complete tutorial before starting! And remember to wear safety glasses at all time because eye injuries ain't worth the risk! It will happen in a blick of an eye.

Have a great time!

ps- Check out Gareth Branwyn book, I made a one motor walker and he made a complete chapter with my robot!! He send me the book call " Absolute beginner's guide to building robots" A very great book!

Maybe I should write a book...

Jerome Demers aka ROBOMANIAC!

Updated july 2007 - I have added some pictures of the inside of my first beetlerobot. Home made AAA battery holder! I have also added some videos on youtube! http://www.youtube.com/jeromedemers

Updated 22 july 2007 - I added a picture and text on step 19 if your robot does not work :P
 
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avenged7x25 days ago
Would it be possible to add an LDR so that the robot can be controlled but when it hits an obstacle(for example a chair) it'll still turn on its own?
robobot311228 days ago

wow . zero programming = 100 percent fun

mkovtchega1 month ago

Will these spdt switches work? They are from and old ball mouse.

image.jpg
hkarlis3 months ago

well I have a little problem I am not getting a 3 pole switch ad I am just getting a switch like this (posted). can u tell me if this works, pls give the way of connection diagram or tell how to connect it . And if not suggest me a site where I can find the 3 pole switch(it should deliver in India)

150x150-13057.png
Enkeim hkarlis3 months ago
watch the picture closely again... at the bottom of the switch you can see that there is the 3th pole. So it should work ;)
hkarlis4 months ago
Enkeim hkarlis3 months ago
Yes why not?
robomaniac (author)  hkarlis3 months ago

yes, those are exactly what you need.

good luck

hkarlis4 months ago

is there any other method of making it as i am not geting the right switch

hai its awesome dude. quite impressive with small steps.

Aditya M5 months ago

I also made it but it was little different.........

but the concept pretty matches with this......

I Don't have any picture of that!!!

Tbus5 months ago

This is a great lab experiment. I'm taking a Robotics Fundamentals home study course (http://www.ciebookstore.com/robotics-fundamentals-...) and this instructable covered a lot of what I learned in my class. Thank you!

mfernando37 months ago
AWESOME STUFF man. Just wanted to give you a quick praise. Thanks!
hussein12 years ago
hey man can i use an mouse spdt switch?? please reply on this site please.
1 year old reply -.-'
The mouse SPDT would be hard to use, you have to de-solder, and the switch doesn't have an actuator lever (The metal thingy). But it could work! You could hot glue the paper clip on, that's what i tried to do, It fell off after the bot hit a wall 3x
CarlyAnne72 years ago
Can I Just Buy One From You ?
You can buy one from Solarbotics now!
Solarbotics Beetle Bot
meghams1 year ago
hey very nice bot ..!!wanna try right away ...but one thing which is boggling my mind is how you have fixed those motors in such a inclined angle..??
raghav571 year ago
i am raghav. i am 12 years old. i got all parts and i made some but how to stick SPDT switches and motors to battery holder.and where can i get heat shrink.the only part i didn't get.where can i get please say
rashtekar1 year ago
my bot is not going front when i coneect battries to the motors directly they work properly...but when i connect it to the switch and spdt switches it works slow and doesnt move forward...plz reply....i have to show it on monday..:-(
rashtekar1 year ago
my teacher is asking the uses of this beetle bot...what do i tell her????
TANMAYEE1 year ago
can u please help with the uses of this beetlebot?? do reply soon. Got an urgency. thank you. :)
Wisaam1 year ago
Can you please tell me the actual function of the SPDT switch and how does it work?...Please do reply..
hi it's cool idea...........!!!!
indradiana1 year ago
can i use two 3 volt motors by only using two 1.5 volt batteries?
does the beetle robot still work normally ?
niljo1 year ago
Hi!! i made the beetle robot, bt it wnt wrk if i let go of the switch.. i have to keep it presd..and the funny thng is tat wen i press the spdt swittch on right side, the left motor rotates and vice versa... cud u pls help me wit dis...
robomaniac (author)  niljo1 year ago
hello

you are also there.

It is normal that when you press the right switch the left motor spin. That is compltely normal with the Beetle robot V1.

You told me that the robot does not move until you press the switch. This only mean that the third connection is not properly connected to the inside of the battery pack.


When you plug the battery both motors should spin forward. When you press the switch, the opposite motor should turn backward.

Make sure you have a good solder joint, a clean one with no flux or dirty thing on it.
hey thnks.. it really helped.. nw ts wrkng no prblm... thnks a lot jerome :)
niljo1 year ago
these are sm pics of the beetlebot i made.. i even made the third connection.. it wud very helpful fr me if u assissted me wit dis.. and my email id is niljos22@gmail.com
16082012351.jpg16082012350.jpg16082012353.jpg16082012356.jpg16082012357.jpg
biocon772 years ago
can i use a Illuminated round rocker spdt switch?
robomaniac (author)  biocon772 years ago
well not really, only if you find an innovating way to trigger the swt with the antenna. then that will work. Rocket swt are stiff (hard to activate) so you need help with a lever system.
thanks also, can i use jumper wires
biocon772 years ago
do jumper wires work?
rimo2 years ago
it works ty sir
xXYEIROXx2 years ago
Hi there, i Did it! it works xDD ok to the grain, i wanna make one for one scientific faire in my high school but i wanna make it with an solar panel, so i dont see where i can put a thirth conection, if you know how plz make me know!
when my robot touches to a wall ,the switch will press till this process the robot is ok but after that the motor do not have that much force to push can you tell me what is problem...

reply at meetshadabmk@yahoo.com......pleaseeeeeeeeeeeeeeeeee
Yaryev2 years ago
Hello, my son really likes science projects, is in third grade. How or where do you recommend I can find information for my child to start learning about robotics? thanks
rnoorlind3 years ago
Thanks to this tutorial I got few burns :p from soldering iron and glue gun but I finished my robot. Although the wiring pic wasn't very helpful as with my robot I had one wire on every thinkable nob but the instructing pic had one wire about two wires. At that part things got messed up. So all was able to do was to sketch circuits until I understood it. But I thank you for making me think it through like that.
Thank you!
rajaavadi3 years ago
Where does that blue wire from motor go?
d'où vient le fil bleu aller?
aabuzaid3 years ago
hi how are you ,,, there are anyone can help me to built robot ,,,, i am studing mechatronics and there are project for robot course ,, my project is wowwee robotpet robot
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