Let's Make Robots!

What microcontroller shud i use?

hi i plan to make a hybrid-quad-walker with wheels on it's feet.  i have figured out that it need to dirve 12-14 servos depending on if it need a neck and head etc. and it also need to drive 4 motors or 2 motors! and then it need to drive a ultrasonic sensor and a few simple inputs! it's best if it is programmed with a USB port  

so please help me find a (not too expensive) microcontroller...

i found this thing...   but i'm only going to buy it if i can use it with the picaxe!                                                              do any know if, and how to use it with a picaxe?

i also found this thing...   but will this work with the 28x1???    it says it includes a 18x picaxe!?                                    do any know if, and how to use it with a picaxe...    i mean the picaxe 28x1!!

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Alright man,

The picaxe servo driver is run off of I2c lines. I2c is just a way of your picaxe to talk to things like servo drivers and is actually pretty easy. It has room on the board for a 18x if you want to use one, but you don't have to. It has connections for the I2c lines to be connected from say, a 28x no problem. The other board you suggest works off of a serial line. Once again, it will probably work with a picaxe. If you had to choose between the two, I would go with the 21-servo picaxe controller. This is only because picaxe's website has picaxe-specific info on it. I have bought a lot of parts that will work with a picaxe, but the sample code they give you is for a adruino or a basic stamp... Then you spend a couple days trying to figure out the code to make it work. When it is picaxe brand, you don't have to worry about that.

A L293D motor driver chip (the one on the picaxe 28x board -the "start here" one) will control 2 motors fwd and rev. If you want 4 motors, you will need 2. Note, the L293D chip will really only run smallish motors. Try to run a big motor and you will fry it.

Picaxe has a USB programming cable or you can get the regular cable and a USB to serial converter.

thanks for the advices...   i'm going to search the net to learn a little more about the picaxe-servo-thingy... and the i'll buy it!

=)

Have you ever wired anything before? Have you ever written code before i.e. Basic, C, assembler?
yes i have made lots of small simple robots...   and i have made a robot arm with picaxe and servos etc.     and yes...     i programmed it too...    and like you adviced me to, i read the manual...  
Most microcontrollers have a board that goes with it to control multiple servos with only using 1 out pin on the microcontroller. I know picaxe and ardruino both have one. Search our site or sparkfun for boards. I would, but I'm being lazy ;)