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136  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 11, 2014, 03:01:17 pm
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137  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 10, 2014, 01:27:23 pm
Let me have your email via PM
138  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 10, 2014, 10:39:32 am
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Great news, if you want I can also test. I have a wanscam IP camera (similar  to foscam)

Why not  smiley

This a screen shot of "Total RC Commander" V0.1B:

The application is working but for the moment, the screen is optimized only for a 8" tablet
I suspect the application needs at least 7" to display the information correctly
sorry, no phones  smiley-confuse smiley-confuse

Do you have a tablet ??
Please let me have size and resolution
139  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 10, 2014, 02:17:41 am
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any chance that you  can add a window to show the feed from a wifi camera? Then we will have the ultimate robot controller
smiley-roll smiley-roll smiley-roll
that's a slightly more complex story  

OK
Did some research, looks definitly doable
I will order a Foscam IP camera which is well supported and documented


I already started development using another android device (Sony Xperia Mini) as an IP camera

Thanks tolisn63 for this smart idea, and... for keeping me busy  smiley-wink
140  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 06, 2014, 02:10:30 pm
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any chance that you  can add a window to show the feed from a wifi camera? Then we will have the ultimate robot controller
smiley-roll smiley-roll smiley-roll
that's a slightly more complex story  smiley-wink
141  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: January 06, 2014, 01:57:31 am
Hi juycce

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do u think in a future could make one to be IOIO otg compatible?
Sorry, no experience yet with IOIO  smiley-confuse

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this app is the best,on Google Store
Gracias smiley-red

142  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: December 25, 2013, 10:11:59 am
Hi hib1,

I am currently on holydays and will be home next week
In the meantime, please make sure you are using the latest AndroLED Arduino demo sketch (V10.2)
modify:
Code:
boolean DEBUG = false;
to:
Code:
boolean DEBUG = true;

DEBUG can also be toggled using Button #2

Let me know the outcome

@all
Merry Xmas  smiley smiley
143  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: December 13, 2013, 03:29:08 pm
Hi kovacsgellert, thanks for your comments

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Referring back to an older post I believe as well that the addition of accelerometer to the available control options would be really nice.   smiley
I had the idea to develop an accelerometer based application, but it didn't generate enough interest here, to justify development time   smiley-confuse
144  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: December 05, 2013, 09:44:32 am
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Edit, problem solved, Thanks KAS for the time you have put in, I will upload a "dummy's guide" later in a bid to contribte : )
Glad you sorted it out
Your contribution will be very welcome  smiley-wink
145  Community / Exhibition / Gallery / Re: GPS logger on: December 05, 2013, 09:15:46 am
Hi Gabi,

Thanks for your interest, welcome to this forum

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- Have you thought about include another battery and measure the impact in the autonomy ? It must duplicate it, doesn't it?
You can install a second battery and get twice the time
Alternatively, replace the 1000mAH 14500 battery by the larger 1500mAH 18650 model

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I'm thinking too in a temperature logger. I guess a temperature sensor will consume less power than a gps so the autonomy with two of those batteries could increase to a few days
For temperature, just hibernate the processor between two readings, with 2mn log time, your battery should last well over one month

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What's the point of the CR1220 battery? are there a realtime clock? or it's used for another reason?
This is the GPS backup battery for storing ephemeris data and allow "warm boot" in a couple of seconds (cold boot takes one minute)
Since my last post, I replaced the battery by a .22 Farad supercap



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Which GPS module has been used for your project?
Fastrax UP501, $27 shipped
http://www.ebay.com/itm/High-performance-and-Quality-UP501-GPS-Antenna-Module-For-Arduino-/170979281074?pt=LH_DefaultDomain_0&hash=item27cf28c8b2

146  International / Français / Re: ATMega328 seul on: November 28, 2013, 12:28:23 pm
Bonjour,

Un exemple d'alimentation directe en 3.2V (LiFePO4) ici
147  Topics / Robotics / Re: Balancing robot PID tuning trouble on: November 24, 2013, 12:45:08 pm
Impressed  smiley-eek-blue smiley-eek-blue smiley-eek-blue
Your project is really moving in in the right direction

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I still can't get proper, clean balance when robot stays stationary. I looked at the Balanduino and it's very still when stationary, it uses the same motors as me so I know it's doable.
I suggest you come back to the basics and, before moving it,  make sure you bot can stay still forever
Encoders feedback will help staying at the same place
 
Code:
int updatePid(float targetPosition, float currentPosition)   {
  float error = targetPosition - currentPosition;
  pTerm = Kp * error;
  integrated_error += error;                                      
  iTerm = Ki * constrain(integrated_error, -GUARD_GAIN, GUARD_GAIN);
  dTerm = Kd * (error - last_error);                            
  last_error = error;

  count = -count_R;
  pTerm_Wheel = Kp_Wheel * count;
  dTerm_Wheel = Kd_Wheel * (count - last_count);                            
  last_count = count;
  return -K*(pTerm + iTerm + dTerm + pTerm_Wheel + dTerm_Wheel);
}

This is how bot should behave when pushed:


I also used (count_R - count_L) to compensate for motor speed difference, and follow straight lines

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I'm thinking of adding a 3rd PID loop to control motor speed
I had the same idea, as motor torque is very weak at low PWM.
Have a look at the second source code here...

Ho... I can't see your sensor board
Make sure it is located near the COR (R for rotation)

Good luck for your Quest for Balance  smiley-wink
 
148  International / Réalisations et Projets Finis / Enregistreur GPS on: November 23, 2013, 07:05:14 am
Bonjour,

Pour les inconditionnels de la langue de Molière, voici la traduction d'un post en langue de Shakespeare
La VO se trouve ici

La trace est enregistrée sur la carte SD, dans un fichier .cvs, qui est ensuite converti en fichier .kml
Télécharger le fichier example (vous devez être connecté au forum pour voir le fichier)
Le fichier s'ouvrira directement dans Google Earth et affichera la trace
 


The projet met l'accent sur le coté basse consommation, en combinant plusieurs technologies suceptibles d'être réutilisées dans d'autres projets:

Utilisation d'un Arduino "déshabillé" (AtMega 328P, $2.99 transport compris), sans Leds, régulateur et puce FTDI
Fonctionnement sous 3V @8Mhz
La carte est directement alimentée par une batterie 3.2V lithium phosphate de Fer, sans convertisseur cc/cc, qui plombe le rendement.
Enfin, le processeur est mis en hibernation en dessous de 3V pour éviter la décharge complete de la batterie

En combinant tout cela, l'autonomie est passée de quelques heures à plus de 20H





Ce projet est modulaire et didactique et permet d'aborder différentes techniques
 - Arduino simplifié
 - technologie des batteries LiFePO4
 - surveillance d'une batterie montée sans regulation de tension
 - les modes d'hibernation du processeur Atmel
 - Le protocole GPS NMEA 0183
 - La communication SPI pour la carte SD
 - les scripts Python
 - le montage dans la boite étanche

Enjoy  smiley-wink

149  Topics / Robotics / Re: Balancing robot PID tuning trouble on: November 23, 2013, 06:01:58 am
Sorry for the late response, didn't get the reply notification

I understand encoders are not yet implemented; you can't get proper balancing w/o encoders, as they are part of the  PID algorithm. this will be now your next task  smiley-wink

PID tuning is (at least for us  smiley-roll-blue) a pure hit and miss, experimental task
I just checked my current setup, both values are positive

Before adding R/C control, make sure that you bot is able to balance forever, even being pushed rather hard
You should end up with a slight back and forth move, due to the motors blackslash

Bigger/softer wheels as shown here also really help balancing
150  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: November 23, 2013, 04:55:38 am
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Hey kas!
Thanks for making this application. It's cool and the controls are easy to use. My friends and I have never worked with Arduinos before and hacked up this robotic ball in a week that uses your app. It was really fun!
Keep up the good work. We love your app!

Hi rtso489
Thanks for taking the time to register and post your first comments on the forum

This is a very cool hack  smiley-cool smiley-cool smiley-cool
Please let us have more info, link to the original device and possibly photo of the internal mechanism
Thanks again for sharing
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