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BROBOT project FAQ
02-03-2015, 01:27 PM
Post: #1
Exclamation BROBOT project FAQ
BROBOT project FAQ

Why BROBOT?

Self balancing robots are fun to see and play. A self balancing robot requires sensors and control algorithms. You will find all the HOWTO and technical documents which explains the “behind the scenes” in JJROBOTS. Learn electronics and robotics creating your own BROBOT from scratch!.

There are some commercial solutions to the balancing robot, but here we want to share knowledge and thoughts. You can use the BROBOT parts to create more robots or gadgets, keep in mind all the devices used in a BROBOT are standard devices/electronics with a lot of potential. In the JJROBOTS community we want to show you how! You are now buying a self balancing robot, your are buying your own electronic and ancillary devices!

Thinking about creating a GPS self guidance robot? a modified version of BROBOT is your robot!


How much payload could carry BROBOT?

BROBOT could easily carry your soft-drink cans. We have tested with 500g of payload with success. More weight makes the robot more unstable but this could be fun also, isn't it?


Why use stepper motors for a balancing robot?

There are several options for motors, DC, Brushless, Steppers... We choose stepper motors because they have enough torque, you could connect the wheels directly without gears that generate some backslash, they have good bearings and you could control the speed of the motors very precisely. Also they are cheap and the drivers too...


Could I use rechargeable batteries of Lipo batteries?

Yes, you could use standard AA batteries (alkaline recommended), AA rechargeable batteries (e.g. NiMh) or you could optionally use a 3S Lipo battery. If you use a Lipo battery we recommend you to enable the battery monitor and automatic shutoff (see Brobot documentation) You should recharge the batteries with your own charger. Run Lipo batteries at your own responsibility.


What is the runtime of BROBOT?

With rechargeable AA batteries (e.g. Ni-Mh 2100mAh) you could expect around 1 hour of runtime ??? CHECK THIS???


Could BROBOT work without the wifi module?

Yes, BROBOT could work and keep its stability. But, of course you could not control it without the wifi module.


What APP do you recommend to control BROBOT?

We recommend TouchOSC app (you have to buy it but it´s cheap!) that is available for IOS and Android (Smartphone and tablets). You could download at JJROBOTS a template with controls adapted to BROBOT. You could also define your own layout if you want (PC layout editor). Cool app!


Why use OSC protocol for communications?

OSC (Open Sound Control) is an open protocol based on UDP messages to control music instruments. The main advantage is that is an open protocol with available apps for IOS, Android, PC... that let you customize your controls.

BROBOT understand some OSC messages (fader, push, toggle messages) that let you control it.


Could I change the name of the Wifi network that BROBOT generate?

Yes, on the configuration sketch you could change the name and also some other internet configurations. You could also connect BROBOT with your existing Wifi network (see configuration examples).


Is this a project for an Arduino beginner?

Well, BROBOT is not an easy beginner project, but it has a lot of documentation so you have a platform to grow your skills. You could first mount your BROBOT following the instructions and it should work OK, then you could start understanding some parts of the code and finally writing your own pieces of code...

For example it could be easily (there are tutorials for this) to write your code so the robot automatically move the arm and spin itself if you don't send a command in 10 seconds...

More advanced hacks: Convert to a totally autonomous robot with obstacle avoiding adding a SONAR, convert to a follow line robot, and so on...


Why BROBOT electronics are not so cheap?

We are a really small startup (2 persons on our free time) and now we could only run small batch of electronics. As yo know the price of electronics drops quickly in high volume productions but we are starting… If we sell many boards and we could run more volume productions we will drop the prices!!. JJROBOTS didn´t born to get money, our spirit is to sell “good products” to found our next projects and spread the robotics knowledge
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03-01-2017, 08:07 PM
Post: #2
RE: BROBOT project FAQ
Hi. Regarding the B-Robot EVO Kit, is it correct that this comes with documentation...
Does the documentation discuss the equations used to derive the state-space form for the controller...
How much documentation is provided regarding the controller design...
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03-03-2017, 08:48 AM
Post: #3
RE: BROBOT project FAQ
(03-01-2017 08:07 PM)KyloRen Wrote:  Hi. Regarding the B-Robot EVO Kit, is it correct that this comes with documentation...
Does the documentation discuss the equations used to derive the state-space form for the controller...
How much documentation is provided regarding the controller design...

You have info about how the robot is controlled (PID and others) here:
http://www.jjrobots.com/projects-2/b-robot/
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