6DOF robot arm controlled by speech recognition or EMG

Let's Make Robots Robots
21

Thanks

Thanks

22

great project

great project hope to see some video

23

Nice design

I really liked the arm design.Quite simple though looks effective.

waiting for the speech control to be installed and see the arm obeying its first order given by its master

 

24

Thx

I’ll experiment with speech control and electromyography (EMG) :slight_smile:

Next step is to build the voltage regulator circuit, based on a LM138 (5A).

25

Hey Markus, Nice project! I

Hey Markus, 

Nice project! I was following it from the shadows and I like how it progresses. I have some questions and some suggestions. First, what did you use to cut the ABS sheets. I know you mention is easy to cut with a knife, but the round parts? Second, and here comes my first suggestion, I have concerns about your power supply schematic, why don’t you use a uBEC (about $5-15 from HobbyKing, depending on amperage) that is a switching power regulator for servos and can supply regulated 5V or 6V to your electronics and servos. If you chose 6V, then you can use a 5V LDO voltage regulator for your electronics or just a couple of diodes in series, since the electronics (microcontroller, sensors…) don’t need more than half an amp. Since you need about 5 amps at max torque (4 standard size plus 2 micro size) you can go for a 5A uBEC. I am using this one for my 12 (mini) servos quadruped. Also, do you want to test out my µServotino for this project?

Cheers!

26

Hi Ro-Bot-XRound parts are

Hi Ro-Bot-X

Round parts are also easy to cut, but you need a stencil. Use then only the carpet knife point. You can also cut round parts with scissors. I cut the turn table in this way. To make them perfect round you can put a screw thru the center, clamp the screw like a drill in a column drill and treat the rotating part with sand paper.

I do not have concerns about my power supply. I need the 5V also for other applications on the arm (I’ll add a LCD, etc.) and I have the LM138 and 7805 already, but your tip is a good one, I was not aware of uBEC.

I want to use your µServotino for one of my next projects, a RHEX :slight_smile:

27

Markus, project is looking

Markus, project is looking good so far.

the EMG is the real interesting twist here.   are those sensors attached to the muscles the same kind the medical world uses for an EKG machine? - little round stickers they place on your chest to monitor your heart?   seems very similar.

is this meant to be a remotely controlled arm where the EMG OpAmp circuit will detect human arm movement locally and send the commands to the robot arm somewhere else? 

28

Hi Paul,Yes, the robot arm

Hi Paul,

Yes, the robot arm will be remotely controlled by my arm movements. The elektrodes are the same like for EKG.