L293dne & Tamiya dual motors gear box.

Other Hardware Robotics
1

Hi!, I have an L293DNE and a dual motors gear box. If I connect 1 motor to the l293dne it work but when I connect 2 motors, it doesn't work.
I'm using a 9v battery. =(

2

9V battery + 2 motors + arduino => is not going to work.

3

I think that you don't have understood (for my english, I'm Italian);
this is my breadboard:

Schermata da 2014-07-18 16:12:41.png
Schermata da 2014-07-18 16:12:41.png1018×614 143 KB

4

Do you think that if I connect 3v instead of 9v it work?

5

The little 9V bricks will not provide enough energy to run the motors. You want to use something like 6 to 8 AA-cells in series. I always use NiMH rechargeable cells.

Also, 3V is too low. First, the L293 will likely not work correctly at such a low voltage. Read the datasheet. Secondly, you get a voltage drop in these chips on the order of 1.5V or so, since they use bipolar rather than MOSFET technology, so the motor gets a lower voltage than the battery.