RC Rocker-bogie EVO

I customized Tadziurski's excellent design for my electronics, which is why I am posting as a "remix" and not simply a "make". I followed his assembly directions.

My electronics parts:
Arduino Nano v3.0 5v
Arduino Nano v3.0 I/O expansion board
Dual H Bridge L298N module (L298N current rating allows 3 motors to be connected to a single H Bridge wired in parallel, so one only needs 1 module for 6 motors.)
DC 6v gear motor, quantity 6
Ultrasonic Module HC-SR04
Bluetooth module HC-05 (HC-06 should also work)
SPST power switch (actually, a DPDT from my junk box)
F-F breadboard wires
AA Battery Positive Negative Conversion Spring Contact Plate

Most parts except for the bluetooth module and battery springs were bought from Knownuttn's eBay store

I soldered a perfboard to manage the connections to the HC-06 and expand the i2c so I can add more i2c sensors.

And finally ... this is a really fun robot!! Thanks to Tadziurski!