Robot arm

[necromangher]

Hi guys
A while ago  I started to build an arm robotic.I found some DC motors with reduction 4 RPM.
The Whole arm is made ​​out of pexiglass all the joints Have  bearings
It has 8 DC motors for 7 joints
For the moment I am controling it with joystycks like an RC car oane for eatch joint
Can you hellp me with the microcontroler ...what tipe shoult I use
The motors work at 24V 
I am sorry for the spellyng I am from Romania
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[Soeren]

Hi,

Can you hellp me with the microcontroler ...what tipe shoult I use
The motors work at 24V 

You can use whatever type of microcontroller that you might know, as long as it has got enough I/O.

You need motor drivers to go in between the controller and the motors. To make it as cheap and simple as possible, you can use relays for switching direction of rotation and the driver can then be a single transistor for each motor plus one for the relay (they both need a couple of resistors).