I bought a cheap motor shield from EBay (branded as Deek Robot). I can't get the thing to work. On the website I found general sheme how to connect it:
http://www.deek-robot.com/edit123/uploadfile/20131128182859312.jpg
I am new to arduino and electronics in general but I understand the basics.Has anyone used one of these Deek Robot boards successfully and can you let met know what you did? Or can anyone explain me how to get it to work? What signal I have to connect as input ?
It uses the L293 driver chip so, I think, IN1 and IN2 control motor 1 and IN3 and IN4 control motor 2. To run motor 1, connect IN1 and IN2 to digital output pins. To run forward write a 0 to one of the pins and a 1 to the other. To go in reverse swap the outputs, write a 1 to the first pin and a 0 to the other. If both pins are the same (both 1 or both 0) the motor is stopped. Connect a PWM pin to EN1 to control the speed of motor 1 and to EN2 to control motor 2 (after removing jumpers).
Hi,
I think groundfungus as said it all, you can't get any simpler then that!! I've run many a robot/buggy on that type of driver, both bought and home made PCB's You will lose about 2v across the L293, which seems to be it's only drawback for something cheap (it's was cheap was'nt it??) A FET based driver losses almost nothing and the SN754400 is a better replancement for the L293.
Hope it helps, get back to us.
Regards
Mel.
PS. See picture.
marcinch18, I wonder if you get it to work.
Did you wrote a sketch and so on.
I wonder.
Hi All,
As the OP as never come back to us to say yes it's OK... Then I can't say we solved his problem or he's gave up, and took up basket weaving instead.
But I just hate it when you try to help someone and never get a thank you, etc. Even if there giving up we can still help..
See my bots here: www.melsaunders.co.uk under Electronics..
Regards
Mel.
Hello,
In these video, the EN1&2 jumpers are not removed. I dont understand why the analog speed pin is connected to IN1.
Do you say me ?
Hi there,
I am trying to make a simple two wheel robot with the same chip. ...and i am having many troubles. For example i wrote a sketch for Ultra sonic distance sensor HC SR01 and it is working but when i am plugin the wires over the driver it is not working. I would appreciate if you could see the sketch.
Please ignore everything, see only loop(). 
It prints 0 0 0 0 0 0 0 0 0...
lastlastlast.ino.ino (4.12 KB)
Found this thread as I have a driver just like OP and didn't have any schematics for it. Hooked it up to a 2kHz square wave PWM and two motors, supplied it with 4volts for the motors and 5V for the electronics and wrote a '1' on each pin and it worked. Thanx. (will only use it for bench testing, as my regular 4x50A bridges are cumbersome to move out of the robot).
