SuperDroid

This method would require custom mechanical components in order to keep the robot stable and consistently traveling in a straight line. All in all, you wouldn’t be saving any money with this method.

No. Its skid steer, if you don’t drive all the wheels, it will not turn regardless of how strong the driven motors are. The non driven wheels need to be casters if you want to do 2WD. We have 2WD platforms if you don’t want to do 4WD.…[Read more]

You could also modify your speed factor on the robot side. For example, if you want half speed:

byteFB = 0.5*byteFB;
byteLR = 0.5*byteLR;

ST.turn(byteLR);
ST.drive(byteFB);

You could also go as far as adding a toggle button on the remote side that would switch speeds. But yes, experiment and see what you like. There are many options you could…[Read more]

This is correct since you’re scaling the turn value after the packet has been checked and normalized.

The programming that’s included with the original price enables communication between the two Arduino’s and configures the output to match a control board of your choice. Any extra code will be an extra expense. More information on the capabilities of our custom work can be found here: Engineering Services.

You will have the ability to change the…[Read more]

Okay, first create an account on our website if you haven’t already. Place all of these items in your shopping cart, select the “request quotation” option, and checkout. It is important to make an account and enter the shipping address so you can be quoted for the shipping cost as well. This doesn’t require any financial information and you can…[Read more]

The advantage of xBee control package is that it supports a wide variety of applications. The joystick input to the Arduino allows for tank mode and/or vectoring mode depending on the wheels. So yes, this package will fit well with your layout. As shown on our page, the xBee control package includes source code and configuration for communication…[Read more]

Your first idea should work as long as the Sabertooth is in the right mode.

Your second idea will work as well and we sell the individual parts and a wireless control package (link below).
xBee Control Package

Depending on your application, I would recommend a joystick input to an Arduino that constantly sends speed data through the xBee to…[Read more]

The sabertooth has multiple modes of control, RC being one of them. You can send a Arduino RC PWM pulse out, but its easier to use the Arduino with serial mode to control the sabertooth (there is a Arduino library for that). Not sure why you are using a RC receiver and a Arduino, but either will work. or you can send the rc signal from the…[Read more]

You could reduce turn_value by some factor before sending the speed command to the Sabertooth. For instance, this would reduce your turn rate to 2/3 range:

turn_value = 0.67 * turn_value;
ST_control.turn(turn_value);

Hi,

To make this work, you need to:
1. Read the joystick values by calling analogRead(axis1pin) and analogRead(axis2pin). These reads will give you values from 0-1023.

2. Scale both of your analogRead values from 0-1023 down to the range -127 to 127. In XBee_receiver.ino, these values are scaled down to 0-255 then sent to the receiver.…[Read more]

The size the wheels, gear ratio, etc. is complicated. We can tell you what does work. We used 6 of these motors http://www.superdroidrobots.com/shop/item.aspx/ig90-24vdc-127-rpm-gear-motor/1141/ in this robot http://www.superdroidrobots.com/shop/item.aspx/used-custom-rc-6wd-robot/1942/ that has 13″ tires. We used direct drive. I would not…[Read more]

We sell a hookup kit. you can get by without it, but it helps. http://www.superdroidrobots.com/shop/item.aspx/encoder-buffer-hookup-kit/1702/

since you have ordered a optical encoder, you will want to remove the pull up resistor jumpers on the buffer board. the item description details this.…[Read more]

I would recommend you use one of these: http://www.superdroidrobots.com/shop/item.aspx/dual-ls7366r-quadrature-encoder-buffer/1523/

It will interface with any encoder that outputs pulses and maintain a count on the number of pulses observed. You can talk to it using SPI communication to read the pulse count, which can be done pretty easily using…[Read more]

Hi,

The product page for the Encoder Buffer Board has a link to the LS736RR’s data sheet: http://cdn.usdigital.com/assets/general/LS7366R.pdf

Pull up resistors are needed on hall effect encoders. They pull the pulse up to your desired voltage. Typically 5V. If you don’t use them you wont get a square wave at the right levels. We have used the kangaroo. It is definitely frustrating getting it to work properly. Its best if you have a scope and can look at the output of the…[Read more]

Hi. The HD2 is a tactical remote surveillance robot. The controls are a proprietary encrypted protocol. It was not designed to be modified by the end user. If you want to make the robot autonomous, you will have to remove the radios, etc. and just talk straight to the motor controller. There is nothing we can support, and obviously will void…[Read more]