Aircores & Ardurino Controller

Re: Custom dashboard-stepper motor / LCD / servos / 7-Seg / leds

Well... I got it!!! :youvegotaPN: Its simple amazing built and I really like the screwshield wings !!!! :clap:

I did a quick program to see its PWM capabilities... Again stand amazed!!! I watched the onboard LED fading on-off at 62Khz PWM frequency!!!! Measured the pulse on my portable DSO NANO!!! :yippiee:


I still cant believe I have 12 PWM channels available on this little thing to play with!!! :freu:


THANKS!!!

Thanos

Congratulations :yippiee:
And I hope that the porting from amc to arduino won't be to difficult.

:

Arduino Power

αυριο παω να βρω και γω το δικο μου κοντερ

hey thanos quick question about tough subject.
if i want to use pid controll on dc motors than is this a close calculation.
begin.
old position -or+ new position.
increment number to new position (speed 0 to 255)
again.
I've tried to read you bs2 code but its gibberish to me :

you want a arduino code

to move the dc to a certain position

and the position of the what dc moves comes from an pontesiometer?

??????????

if so

new position is from serial, say 80
old position is readout from potentiometer hooked up to dc motor, say 20
so than calculate the difference between motor position and new position.
80-60= 20 difference
than move to new position with desired speed without overshooting it.
i think i got the basics but the calculation on wikipedia are not readable to me hahaha.


i guess that this is the calculation from tronic's basic stamp code

so yeah something like that :highfive:

why dont you use the above code

i just wrote it

its not tested but it should work if you play with the -1 +1 for the overshooting

i will try to make one with pwm later

yeah i am already using it for testing, but i will smack myself in the head if it was this simple.

I made a little mistake about P.I.D it supposed to check where the motor is and where it should be, so you can make up for the overshooting.
little arduino code i found about PID

Code:

int val = analogRead(potPin); // read the potentiometer value (0 - 1023)
int target = map(val, 0, 1023, 0, 3600);// set the seek to target by mapping the potentiometer range to the encoder max count
int error = encoder0Pos - target; // find the error term = current position - target
// generalized PID formula
//correction = Kp * error + Kd * (error - prevError) + kI * (sum of errors) //<- this being the calculation what i was talking about

// calculate a motor speed for the current conditions
int motorSpeed = KP * error;
motorSpeed += KD * (error - lastError);
motorSpeed += KI * (sumError);
// set the last and sumerrors for next loop iteration
lastError = error;
sumError += error;

but i also found that there is a pid library for the arduino, but that doesn't make sense so far

what pid means?


the pontesiometer (i_am_at_this_potision) checks where the motor or the chair is

the (potision) is the serial read for where the motor should be

yeah but the trick is how farther away from the new position the faster you go to it. (setting max speed)
but along the way measuring the distance to go, so that you will slow down when you are near the new position. (setting minimum speed)
http://abigmagnet.blogspot.com/2008/10/dc-motor-control-part-one.html
this is some great documentation about it (i was searching for it all day)

ok let me make somethink with pwm

*why i had write POTISION???

5ms at the moment and no delays in code

Perhaps from potentiometer or you have a girlfriend from Patisia or you are just tired as its getting late... My mind was turned to Frappe trying to educate myself in C and the new command set... I'll have to do a quick format at my brain soon... heading for the bed! :keepawake:

dont you have a dual boot mind

*κανε μου μια χαρη και πες μου αν αυτο ειναι σωστο σε παρακαλω
http://www.hlektronika.gr/forum/showthr ... post373765

ρωτα με και αν μπορω θα βοηθησω

haha i didn't notice either, a well it is quite tough to think in English let alone write in it.
I don't type without my spelchecker on.
I've lost the ability to concentrate so I'm going to stop now.

;D

Looks like some new controllers are going to surface for X-Sim very soon! Good to see you guys working on the arduinos.

Judging by the code, the programming environment seems to have a fairly higher level instruction set (even Mickey Mouse could write a program with it ), but the speed of the micro controller should make up for it. Just make sure to avoid delay(); in the code.