SuperDroid

OK let me know the results of that test. And can you also show me the drive command packets you’re using? And when you say the robot doesn’t stop, does it just keep traveling at the last speed you sent it and then stop after 4 seconds or does it just slow down very gradually?

Sure you can email code your code to sdr@sdrobots.com.

And can you show me what you’re calling the “go” and “stop” commands? What are the exact packets that you’re sending?

How are you writing and sending commands to the robot? I would suspect that the delay is due to the Bluetooth. The Arduino is communicating using Serial, meaning you could potentially bypass the Bluetooth and try communicating with it via the USB port as a test. The timer in the code is only used to detect timeouts and stop the motors as a failsafe.

I assume it worked to begin with since the robot is 4 years old. You will have to look at what has changed since the last time it worked. Make sure the batteries are good and fully charged. Other than that it is hard to say what the issue is without a lot more information

Hi. If you don’t mind, we would need the order number. Is the Bluetooth something we installed? we typically do our communication at 10Hz or faster.

Hi Che,

Thanks for the question! The pinout between the Mega and Uno are different. I would confirm in the code that you are using the correct pins. Here are the links that show the pinout for each board.
https://store.arduino.cc/usa/mega-2560-r3
https://store.arduino.cc/usa/arduino-uno-rev3

We also have schematics on our site that should…[Read more]

Hello Chakradhar! Thank you for reaching out to us with your question. For our amphibious robot, we didn’t use any software to test performance in the water. We used practical testing to make sure the unit could float and maneuver in the water.

We have two videos on our Youtube channel showing our tests for the…[Read more]

Hey Frank. We don’t really offer a general design for autonomous robots. Builds vary depending on budget and application. For a simple robot that travels an approximate distance while avoiding collisions, wheel encoders and sonar distance sensors would suffice. A more complex and robust system would include wheel encoders, IMU, and a spinning…[Read more]

Hi, Check your wiring of the motor controller. Make sure you have both left motors wired to one channel and both right motors wired to the other channel. Then check what channels you are using on your receiver. We typically put drive and turn on the same joystick. To do this you need to use the elevator and aileron channels.

The analogWrite() command takes values from 0 to 255. You need to take the absolute value (or magnitude) of your pid output, scale it to 0-255, and set the direction pin output for that motor high or low depending on the sign.

If you’re making a ride-on car then you’ll likely need an IG42 or IG52 motor. Unfortunately we don’t have any 12V IG42/52 motors with encoders in stock. You could try using a 24V IG52 motor (such as these: https://www.superdroidrobots.com/shop/search.aspx?search=IG52+24V) and running it at 12V and that may be good enough but won’t be ideal.

We…[Read more]

It depends on the charger, but most chargers include the necessary charging circuitry and you shouldn’t have to do anything yourself to make that work. I’m not sure what voltages are present on the XLR connector you’re using, but if the batteries are being charged in series with a 24V charger then make sure you balance the batteries occasionally…[Read more]

Hi Che,

I just wanted to follow up from our phone call and provide a summary.

Question 1:
Yes, this would be the best approach. Using libraries from the individual device item pages will result in cleaner code and provide an easier way to make hardware changes.

Question 2:
The schematic only shows the power and ground hookup for the receiver.…[Read more]

Hello,
We mainly use brushed DC motors, so I don’t have any specific motors to recommend for you.
As far as mounting and wiring, you can take a look at our How to Build a Robot Support Page for some ideas on mounting, and wiring.

If you end up needing a special assembly, or a motor shaft adapter, you can fill out our custom request form.

Hi Che,
you can find an example of the encoder buffer wiring here.
Encoder Buffer Wiring Diagram

As far as wiring the RC receiver to the Arduino, you want to take the signal wire from the receiver and plug it into a PWM input of the Arduino. You will have to do this for all of the channels that you need.

That is not a scooter we supply, so we do not know what motors they use. This forum is for support of our products on http://www.superdroidrobots.com. Thank you for your interest.