Tutorial Arduino code for 4DOF and 1 DIRpin Hbridge board

Thank U!

Yes, this code is working for 4DOF
Just check your HBridge has only 1 pin direction

I'm continuing with work and I wanted to understand one thing , I am using the code 4dof racing mat with 2 monster motor, reading the features of the card read :
● Voltage Max : 16V
● Maximum current rating : 30A
● Practical Continuous Current : 14 A
● Current available to Arduino analog pin sensing
● on-resistance MOSFET : 19 M: ( per leg )
● Maximum PWM frequency: 20 kHz
● Thermal Shutdown
● Undervoltage and Overvoltage shutdown
If I have a 12v engine that develops continuous current 14A , the motorcycle monster card can attack only one right engine ?

you have to read the specifications of the chips
- a motomonster board has 2 VNH2SP30
- http://cdn.sparkfun.com/datasheets/Dev/Arduino/Shields/10832.pdf

and be careful to apply a security margin!

I can second your experience with that cheap h-bridge, it lasted me 5 minutes of low-amp- playing around before it sparked and began to smoke!

2x pololu h bridges are now ordered and on their way


Your code works flawlessy with 2 motors btw, its awesome, thanks a lot!

Bad news... Hopefully your arduino has not been destroyed like mine did when these Hbridge blew up.

Thanks for your feedback

Hi Mat,

Could you tell me the Arduino Uno pin outs for DIR3, PWM3 and pot3.
I am using three Pololu 24v 21 drivers. https://www.pololu.com/product/2995
It could be already stated on your posts... Just can't find it sorry.

your driver is One pin direction and One pin PWM
so it's compatible with the code

Code:

#define potL A5
#define potR A4
#define potY A3
//#define potW A2  // no PID needed for Wind -> no Pot on a wind motor

int DIRpin[4] = {
  2, 3, 4, 5};  // if HIGH/LOW then motor runs Forward/Reverse (depending on wiring)
int PWMpin[4] = {
  6, 9, 10, 11}; // PWM vary between 1 (slow speed) and 255 (fast speed)

DIR3 -> 4
PWM3 -> 10
and pot3 -> A2

Thanks Mat!

Hello Mat,
Thank you for this great work. Yesterday I tried your code with the configuration and set-up below. I want to ask you what must be the wires for 4th motor? I tried on A2 to Dir 5 and Pwm 11 but it didn't work. What could be the wrong thing?

Arduino Uno => Pololu #758 (18V25)
Pin A5 => DIR pin 2 , PWM pin 6 Ok, It works
Pin A4 => DIR pin 3 , PWM pin 9 Ok, It works
Pin A3 => DIR pin 4 , PWM pin 10 Ok, It works
Pin A2 => DIR pin 5 , PWM pin 11 Unfortunately It didn't works

You mentioned that to use 4 motors Simtools set-up:
R7FL7FY7FW7F
R<Axis1>L<Axis2>Y<Axis3>W<Axis4>
R7FL7FY7FW7F

Thanks
Burak

What is your fourth motor?
If you need to read its potentiometer, uncomment the line (= remove // at the beginning)

#define potY A3
//#define potW A2

Thank you for fast reply, I will try it on Monday.
I am using 1 Arduino, 4 Pololu 758, 4 motor, 4 pot.

I think this is awesome I have ordered some motomonster cards for $25.15eaAUD and will give your code a try keep up the great work.

Hi,
my wind simulator fan didn't work, no output but the other Dofs are working.
What could be the problem? please help.

My interface settings are:
R7FL7FY7FW0
R<Axis1>L<Axis2>Y<Axis3>W<Axis4>
R7FL7FY7FW0

On Arduino Uno
5-11 and GND are wired to Pololu DIR-PWM-GND

On Simtools Axis assignment, the 4th Dof is set to %100 Surge

Thanks

Can you please post some setup screenshots and photo of your boards?

Thank you, very helpful
But I might want to consider using 2 cheap motors to try

merci racingmat pour ton travail et ton partage
j »i un simu 2dof avec ton code que je viens de refaire complètement en 3dof
mécaniquement, je n'ai aucun problème, mais programmation je suis pas top du tout
j »i un arduino et 2 monstershield et le progamme qui est dans ta signature est pour une direction alors que les monster on besoin de 2
comment modifier ton premier programme 2dof en 3dof?

j ai fait une erreur , ça ne marche pas car les monter shield sont prévu pour 16 volt max et pas 24 volt, donc mon problème est résolut , faut des sabertooth 2x32