Is this all feasible? Are the parts spec'd well enough?

Projects General Guidance
1

Hi,
I'm currently trying to design a circuit using an Arduino Uno to two 12V DC motors via MatLab using an l293DNE to control them both bidirectionally.

EMG30 data <-- Motor
http://www.ti.com/lit/ds/symlink/l293.pdf <-- H-Bridge

The picture attached is the same setup I have, however with a 12V power supply attached to the H-Bridge so that it is not connected to the Arduino in anyway.

My question is, with a 12V supplied to Vcc2, will both the motors be able to run to their max capacity without the need of a Motor Driver to handle the current.

Thanks in advance!

Ard setup.jpg

2

The L293 is a very old chip, newer ones with FETs work much better (less power wasted, less heat).

The motor current depends on the motor load, you must know yourself how much continuous and peek current will be required.

3

Image from Original Post so we don't have to download it. See this Image Guide

b8bd21783581ebee20825ff7d51bf85c42390a79.jpg

...R

4

The L293D has very limited current handling capability and cannot supply the 2.5 ampere stall current drawn by your motors.

Motors draw the stall current every time they start up, and twice that when rapidly reversed.

5

scottlg:
My question is, with a 12V supplied to Vcc2, will both the motors be able to run to their max capacity without the need of a Motor Driver to handle the current.

I don't see Vcc2 marked on your image so I don't know what you mean.

You cannot run ANY motor without a motor driver. An Arduino is completely incapable of providing the current required by a motor.

...R

6

scottlg:
The picture attached is the same setup I have, however with a 12V power supply attached to the H-Bridge so that it is not connected to the Arduino in anyway.

Did you connect the grounds? (The black wires in the supplied image.)

Please don't post pictures of a setup you don't have. A pencil sketch badly photographed with a phone is preferable to an image with the description "I don't have ..."