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Topic: 6 Wheeled Robot - Differential Steering (Read 1 time) previous topic - next topic

That looks more like it. Even though it's peak is only 30, do you think that'd give me enough headroom?
And is it easy enough to use?

joe mcd

You would be better off at the full 24 volts.  Higher voltage means lower current at the same power. 

You can also connect both outputs to a single motor which doubles the current rating.  You would then need 1 board per motor.


Okay. So it looks like I need to solder the motor wires directly onto the board.
Do you know where I can find an RC remote with the sensor, and where it would go on the Arduino?

zoomkat

Discussion on a fairly high powered inexpensive H-bridge.

http://forum.arduino.cc/index.php?topic=148482.0

http://www.ebay.com/itm/Double-BTS7960B-43A-Motor-Driver-High-power-module-smart-car-driver-For-Arduino-/221235721147?pt=LH_DefaultDomain_0&hash=item3382ad33bb
Google forum search: Use Google Advanced Search and use Http://forum.arduino.cc/index in the "site or domain:" box.

joe mcd

Quote
Do you know where I can find an RC remote with the sensor, and where it would go on the Arduino?


Do you mean Radio Control or a TV style IR Remote?

If you mean IR, here is what I use with robots. Notice the small handheld remote on the same page.
http://learn.adafruit.com/ir-sensor

I use this library: http://www.righto.com/2009/08/multi-protocol-infrared-remote-library.html


#20
Jul 26, 2013, 12:56 am Last Edit: Jul 26, 2013, 01:23 am by doctorflash Reason: 1
Radio control. Similar to this: http://site.rctoyz.com/rideon-car-remote.jpg

Would this work if I remove the sensor? (Or whatever it's called that picks up the signal).

joe mcd

RC controllers are normally used with RC Receivers.  The Receiver then controls motor ESC's and servos.  The ESC is somewhat similar to a motor control board but not identical.  Putting an Arduino in the loop is possible but a bit convoluted.

Are you trying for remote control, autonomous control or some mixture of them?

Here is an interesting tutorial with followup comments: https://www.sparkfun.com/tutorials/348

I want it to be remote controlled, but just to start out with. Eventually fully autonomous.
Could I use the parts from that car?

joe mcd

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Could I use the parts from that car?


Probably not.   In any case, all RC boxes work the about the same differing in # of channels, range etc.

You should start with something inexpensive like this kit.  I am not recommending this model just using it as an example.
http://www.hobbyking.com/hobbyking/store/__16239__HobbyKing_HK6S_2_4Ghz_FHSS_6Ch_Tx_Rx_Mode_2_.html

The little black box receiver 6 outputs must then be read and interpreted by the Arduino.  This only makes sense if you intend to move toward semi-autonomous or fully autonomous operation.  Otherwise the Arduino is pointless and direct RC control easier.

If you search this forum you will find others who have done similar projects.  I'm no expert on RC systems.


Would that automatically do differential steering? Because I already bought the Arduino and $50 motor controller that connects to the it... can I still use those for something? Maybe once I go autonomous?

joe mcd

I already bought the Arduino and $50 motor controller

You should use them.  The Arduino will interpret the RC commands and perform the differential steering thru the motor controller you purchased.  I was just pointing out that the system could be built without the Arduino but with no independent abilities.  The Arduino allows you to evolve the system over time.


Oh, great. I was worried. Thanks so much for all of your help!

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