The BRAT should be ready to purchase this week!
Adding DOF to BRAT is certainly possible. However more powerful servos will eventually be required as the robot gains weight. 
I included two screen caps for the servo calibration. Did you forget to click the reverse boxes on one side? Also (this is important) the robot should stand perfectly straight up with the servos set to 0 degrees. We are working on an update to SEQ to make the servo calibration easier, but for only 6 servos itās not too difficult. Stay tuned we will be posting a tutorial soon to better illustrate this process.
Reverse boxed on one side 
ā¦ Man I really need to read the instructions sometime in the future. 
I figured it was something simple like that ā¦ but I have had fun re-doing some of the movements.
ok, i have gotten the money and i plan to buy the BRAT either tonight or tomorrow 8) 
first of all, i have 2 HS-645MG servos lying around, and i was wondering, if i were to incorporate these into my bot, which joint do you think i should put them in? i was thinking the hip joint so that it may have faster steps with more power, any suggestions?
also, i was wondering where you got those cameras, jim 
and how well do they work, and if you could give me the URL to the page thats it on i would be eternally grateful
oh yea, i have a HS-422 servo and wenever its running, it does this little skip thing, and it makes flucuating sounds of stress, i pretty sure i did something to the gears even though i havenāt used it except in a pan and tilt, and the funny thing is wen i apply a small amount of force to the servo horn, the skipping stops, and it runs normally, finally on start up wen its going to mid position, it doesnāt do it, only wen i make it move with the PS2 controller 
-jared
I would say the servos that stress the most might be the ankles as you are holding the WHOLE robot on one servo and have the longest distances from servo to top to move (longer it is the weaker the servo gets) Plus it is also holding the other foot at this point. The Hip is the ones that look like it might be the high stress point but is always in the middle and is used for the blancing of the bot.
clear as Mud??
example ā¦ Pick up a broom from the middle and lift the brush part above your head. Then do it again from the end of the boom and lift the brush part over your head once again. Not as easy as the 1st one.
o0o0o0o, i see, thanks for the advice malatory
Np ā¦ that is really the question on how to tell how much weight / stress would be put on the servos for longer legs what got me to sign up to the forums
Malatory hit the nail on the head.
When the botās legs are on the ground, the ankles experience the most strain.
When a leg is lifted, the hips experience a decent amount of strain, but even then, the ankle of the foot left on the ground is experiencing much more.
If youāre picking and chosing which servos to go el cheapo on, the knees are the best of the poisons.
hi,
I have a serial connector cable that i received with another bot (cable has 9 pins)
can I use that one to control the ABB or the SSC-32? or is it better to buy the one that comes with the combo (BRAT) (for wichever reasonā¦)
Sam:D
the cable you have should be fine for the SSC-32. It is a 9pin conection on both sides.
Iām wondering about that. If the robot is balancing on one leg, the knee servo of the active leg would have to hold or move just slightly less weight than the ankle servo below it. The hip servo would never support more than 1/2 the robot. Correct?
Harry
We have a preliminary assembly tutorial up. I will be adding more information specific to the setting up and running of the sequencer to control the bot tomorrow. Then we will put the little BRATs in stock.
ok, but Im geussing a remote controll brat is in the workings right now??? having him teathered to the computer is fine for now though.
Of course we will support the PS2 game controller interface, however before that I want to try something differentā¦
I found a universal remote control for TVās. I tested our IRPD which is usually use for obstacle detection, and found I could read nice clean pulses from it with the remote. Nathan at Basic Micro is going to write an interupt driven IR receiver program that will run in the background, and populate a variable in the basic program we will create. So it will be possible to control the BRAT with a TV style remote control. Because the IRPD has the IR receiver AND two IR LEDs onboard the BRAT will be able to send IR as well. So they should be able to chat with each other.
so with the IRPd code, it should be much easier and cooler
thx jim.
wonder if the controller from the RoboRaptor would be useable as well.
me with no money for sensors 
Some one please give this man a nobel prize! FANTASTIC IDEA!
With all of the warpped people here programing bots ā¦ I would say someone going to need to get us not to try and take over the world to get the Nobel Peice prize.
Donāt worry. I have everything planned outā¦
One of my co-workers (at my real job) says I need to add Blue/RED led so I know what Mood my robot is in (In referance to I, Robot)