I am a college student and a newbie in electronics/robotics&co. but I am very eager to learn.
!!!DISCLAIMER!!! - I might say some stupid things, try not to laugh that hard and help me
I am attempting to build a semi-autonomous 4WD robot. Most of the plans and parts are somewhat sorted but I am kinda stuck
Chasis: Dagu Wild Thumper 4WD
Motors: 4 x Pololu 75:1 Metal Gearmotor 25Dx54L mm HP 6V
7.4V 5000MAh LiPo
FrSky RC controller with FS-I6B reciever
Raspberry Pi3 model B+
No clue what motor controller would be suitable.
For the robot control "requirements": robot could be configured to run autonomously most of the time, but a human operator could override the autonomous function if the robot gets stuck, and if possible transition back to autonomous mode.
I guess that to be able to achieve this, the Rpi, the motor controller and the RC reciever module are the key.
The reciever is this - https://hobbyking.com/en_us/turnigy-ia6 ... -sbus.html
It supports PWM, PPM, SBUS or IBUS protocols.
For motor control I was thinking about this shield - https://www.pololu.com/product/3751
The nice part about it is that I can power everything with one LiPo pack.
The confusing part is that it says it can control the motors only by PWM and it doesn't have current sensing. Also Operating voltage range is between 6.5 and 30V and my motors run at 6V.
Any help or advice is highly appreciated. Thank you!