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256  Using Arduino / Motors, Mechanics, and Power / Re: Servo jitter problem on: August 06, 2013, 01:44:33 pm
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I saw in a previous thread about this problem, that the wire length should be less than 6". Why? And why would changing that specific wire length solve the problem, but changing any other wire length not help?

Probably electrical noise.


Try "braiding" the cables together. If they are all raped around each other I't might less the noise. I don't know why this happens, but it has worked for me in the past. Make sure you have a capacitor running from your power to ground.


Best of luck!
257  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 01:38:54 pm
I added it in.
 

Thank you.
258  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 12:45:37 pm
This is what I bought…

http://www.ebay.com/itm/290940423904?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

If they work I think I will leave the PCB as-is because I would be afraid I would mess something up in my effort to make it look neater.

Thank you so much for all the help you have given me! Hopefully everything I have learned in this forum will help me when I go to get a degree in Electrical Engineering next year.
259  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 12:16:07 pm
I believe that it is finished!
260  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 11:07:50 am
I was able to make all the changes except connecting the capacitors directly to ground. How do I do that?

Thank you so much for all of your wonderful help!
261  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 10:27:05 am
I get it now! How is this…
262  Using Arduino / Motors, Mechanics, and Power / Re: L298N Motor Driver board smoking.... on: August 06, 2013, 10:00:30 am
I'm working on building my own motor driver from the BTN7970. Maybe you could build something similar? Just another idea. Also, Trossen Robotics sells nice motor drivers.



http://forum.arduino.cc/index.php?topic=179561.0

http://www.trossenrobotics.com/

Best of luck!
263  Community / Bar Sport / Re: Smart TV versus Android TV dongle on: August 06, 2013, 09:11:52 am
I have to say that the best smart tv I have used would be a  Samsung! Why do you hate them? They have, few glitches, regular/quick up dates, and have good performance! The app store is also good. I would never by a smart tv that is not Samsung!
264  Community / Bar Sport / Re: What would be your Company Name? on: August 06, 2013, 09:09:07 am
Give us some more info. I love coming up with names but I need more to go on…
265  Community / Bar Sport / Re: Are microwave oven food healthy? on: August 06, 2013, 09:06:57 am
Microwaves are very dangerous! I don't even own one! They alter the food that they are cooking and many leak radiation!


http://www.globalhealingcenter.com/health-hazards-to-know-about/microwave-ovens-the-proven-dangers


Never use one!
266  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 06, 2013, 08:24:34 am
I was able to do everything except keep the power from having to go through a via. I was just not able to think of a design that would work. I did add a few more vias so hopefully that will help. Also, the motor is only 12v, and i'm guessing around 5 amps. (no data sheet)


Do you think this one will work?


Thanks!
267  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 05, 2013, 10:03:16 pm
I would like to start by saying thank you! I have learned quite a bit about PCB making because of you. Hopefully this will be my last attempt at making this PCB...
268  Using Arduino / Motors, Mechanics, and Power / Re: BTN7970 Motor Driver [Update] on: August 05, 2013, 05:25:10 pm
I was able to fix everything you listed. Thanks for the link.  I thought I could just add a small heat sink on the top via thermal glue. I was able to extend the pad around the chip so I might not even add the heat sink in. With no load on the motor it only pules 2 amps.
269  Using Arduino / Motors, Mechanics, and Power / Re: 3V-5V (22MA at 3V) motor, control directly with PWM on: August 05, 2013, 04:55:17 pm
Sorry for the general use of the word board. Your right it is an IC, but it is not Pre-made in the sense that it currently has no way to connect to his motors. He will have to make a PCB, Use a breadboard, or try and solder the connections on to the pins. According to his earlier post he seams to think that if he builds anything that it will fall apart for some reason. That being said unless he wants to pick up a soldering iron, he does not really have many cheap options.

What are you thinking dan252?
270  Using Arduino / Motors, Mechanics, and Power / Re: 3V-5V (22MA at 3V) motor, control directly with PWM on: August 05, 2013, 04:06:56 pm
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Not true, H-bridges are not needed here, you missed the OP's comment:

I have looked and have yet to see a board that is able to control 4 motors for under $20. Remember he thinks if he builds some thing it will fall apart for some reason. Also, if you do manage to find a board like that it will probably be more heavy which is not good for a Tiny UAV!

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