Making a Robot, need advice on Controlling.

[RAGNES7]

So, I'll start from the top. It's a personal project which is basically Vehicle and Robot Hybrid.

I have 22 motors in total while have voltage range of 5.5 - 12 volts and max 2.2 amps.

Appart from that, I'll have to put in PC case fans for cooling. So, 2-3 of those.

My question here are : 

1) What Arduino and Raspberry Pi do I need in order to make this Robot control all motors?

2) What do I need to run Tensorflow? I already have a Logitech C270 USB webcam for this project.

3) Do I need to learn Python for this project?

[WereCatf]

6 minutes ago, RAGNES7 said:

1) What Arduino and Raspberry Pi do I need in order to make this Robot control all motors?

Depends on the types of the motors; are they servo-, stepper- or regular brushed or brushless DC-motors? They're all driven differently and for e.g. simple DC-motors, you'll need to either build your own motor-controller-boards or buy them off of e.g. eBay. For servos, a PWM-signal is used to control them, but neither the RPi or Arduino has enough PWM-capable pins to control 22 motors, so you'd need PWM-controllers and control those controllers over SPI or I2C and so on.

 

You will not be able to drive all 22 motors from a single Arduino or RPi, unless they already include an I2C- or similar controller on them.

 

7 minutes ago, RAGNES7 said:

2) What do I need to run Tensorflow? I already have a Logitech C270 USB webcam for this project.

3) Do I need to learn Python for this project?

An RPi can run Tensorflow and getting started with Tensorflow is easiest with Python, so yes, you should learn it.

[RAGNES7]

1)  8 of those are brushed DC motors of 12 volts and 1.2 amps

2) 8 other motors are brushed DC motors of 12 volt 2.2 amps.

3) remaining 6 are MG995 servo motors 4.8 to 7.2 volts which I have connected to a 16-Channel 12-bit PWM/Servo Driver I2C interface PCA9685.

4) I found some DC motor controllers LN28 something. And there are again from another Asian country, so far I have bought parts from random stores from all around the world. Some of which I had to convince to sell out of thier country (which was against thier policy).

14 minutes ago, WereCatf said:

Depends on the types of the motors; are they servo-, stepper- or regular brushed or brushless DC-motors? They're all driven differently and for e.g. simple DC-motors, you'll need to either build your own motor-controller-boards or buy them off of e.g. eBay. For servos, a PWM-signal is used to control them, but neither the RPi or Arduino has enough PWM-capable pins to control 22 motors, so you'd need PWM-controllers and control those controllers over SPI or I2C and so on.

 

You will not be able to drive all 22 motors from a single Arduino or RPi, unless they already include an I2C- or similar controller on them.

 

An RPi can run Tensorflow and getting started with Tensorflow is easiest with Python, so yes, you should learn it.

 

[RAGNES7]

And, one more question,  How many Arduinos can I hook up to a Raspberry Pi 4B ? (1 GB ram)

[RandleMcmurphy]

15 hours ago, RAGNES7 said:

And, one more question,  How many Arduinos can I hook up to a Raspberry Pi 4B ? (1 GB ram)

As many as you like. 127 if you chose to set the arduinos as i2c slaves.

Whats your application? (why do you need an ai robot with vision?) if its for a school project, I would bite off less so you can chew it.

Also, how are you powering the unit?, battery packs add a lot of weight.

 

From what I was able to gather in 5 min from the google. Your "LN28" motor drivers should only use a few control pins, the pi can handle that, but you might want a port expander seeing as how your using quite a few drivers.

 

If I was doing a project of this caliber, I would mainly focus on getting the hardware to work first, worry about the ai latter. For testing motor functionality, you could set up a hardware controller / joystick.

 

Any more details you can provide about the project, the better, tag me if you have a question.