4 wheel drive and 2 distance sensors

My project now has 4 motors and 2 distance sensors. It detects if it will hit something according to its sensors and will head back in reverse.

Powered by 16 AA batteries and 1 9V

I am now waiting on a part from tindie.com in order to connect more ultrasound distance sensors.

Building a robot

I have put some parts together I ordered. It’s using the 2 nasa wheels but different motors and everything else. It is all powered by a 9 volt battery now. I am getting a case for 8 AA batteries to generate 12 volts and I think more available current. Hopefully, that will increase the torque of the 2 motors.