Hello, greetings to all robot builders, I am eager to receive the board ez-b, to give life to my butler robot, robot weighing 2.5 to 3 kg, the wheel servos are 15kg of torque, modified for continuous rotation, arms and head as well these servos, body materials are cheap and easy to find, I have a lot of ideas for the project that I'd like to share. Ping 3 sensors and 1 sharp infrared, head with 2-axis motion, arms opening and closing hands, voice, etc. .. And all thanks to the fantastic product ez-b, which by its ease and flexibility, have encouraged me with this project, since my childhood I came in my mind. Here is a video with the current assembly.
By R2D2
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Thanks DJ, What about just putting an antenna on the main board and leave the other one alone? Any problem withthat?
The longer the antenna, the more work the transmitter has to do. The more work the transmitter does, the hotter it gets. The hotter it gets, the shorter life it has.
Up to you
I get a strong signal throughout my entire house. I can't go from second level to basement, but I can go basement to first level and second level to first level. I don't have any range issues.
A few things you can do instead of modifying the antenna. You can extend the cable on the bluetooh module, and put them higher up on your robot. Away from metal and away from each other (if there are two).
You can do the same with your controlling computer. Ensure the bluetooth dongle (if it's a PC) is not surrounded by wires and cables
Once more a big Thanks DJ, I only get about 30 ft. and if I go a round a corner forget it. It is really lilmited. I have the two EZ-B's as far apart as I can get them. Oh well, it is still most amazing and unbleiveabel fantastic. Wish I had your distance. By the way, the joy stick only is" line of site". Major bummer. I don't wish to sound negative. This is more fun that I have had in many years. Thanks so much. Buster lovers you! Regards form the bookmaker.
Ha I love buster! Have you considered XBee or Synapse? I know that Skater on here uses it. I think he has a break-out for it? I don't recall. Maybe he'll chime in.
Do a search for Xbee and see what you find
Yep, long range control of the EZ-B can definitle be done with 802.15.4 RF network modules such as XBees, but more so Synapse modules. If you check out the optimus prime bot in the project showcase area on the forums you can get a bit of info there but I do plan on making a longer more detailed post soon on long range serial transmission one of these days, along with my finding with the SOMO-14D module but haven't found the time yet.
While you can definitely achieve a longer than bluetooth range with Xbees, (which I have a bit of experience with) I would definitely recommend Synapse modules as they give a longer range and a much easier and cleaner configuration process and user interface.
On the hardware side of things for both types of module you will need to supply them with the 3.3V on the EZ-Bv3, Ground, RX, and TX. To do this you will need a breakout board of some kind, we have both at Solarbotics if you are interested. Also note that you will need a level shifting circuit on the RX line of the network module as it isn't 5V compatible, the easiest thing to do is add one resistor in series and one to ground in a voltage divider configuration in order to satisfy the needed 3.3V level. See the diagram for the Arduino Xbee shield if you like a visual aid.
I should be able to offer more info when more of my time frees up.
when you guys list g and kg can you please also list the weight in lb. for us that dont use that system? the same thing with meters, we use feet and inches. if we could see both inches/centimeters it would help us understand what you are saying better so we dont have to find a conversion program online just to understand. if its not too much trouble
thanks
TJ
hola r2d2 me gusta tu trabajo donde sacastes las placas de la robotica en pagina para pedirlo respondeme cuando puedas un saludo
@R2D2 - I just read this post again and I am still so impressed with your work. It does seem like you have a lot more options when you build the bot yourself. And I love your use of everyday (and inexpensive) items to make this bot. I have been truly inspired by him and you. Thank you for your posts!
Bret