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1  Using Arduino / Motors, Mechanics, and Power / Re: Total newbie needs help. on: December 13, 2012, 02:58:30 pm
Hay all.
I am in the process of buying my first Arduino for motor control mostly. I want to know from you more clever guys what board would you suggest? My main priority will be the control of DC, stepper and rc servos.

You could buy Arduino Uno (R3) or Leonardo. These boards can control servos - and with H-bridge (you'll find it from old servo) you can control DC. For stepper, you need circuit which can control stepper (you have to know stepper type ).
2  Using Arduino / Motors, Mechanics, and Power / Re: Rechargeable battery for 3 motors on: December 07, 2012, 07:22:43 am
Oh, just a last question:

How can I recharge this ( http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16331 ) kind of batteries ?

You need a lipo-charger. Like this:
http://www.hobbyking.com/hobbyking/store/__6478__IMAX_B6_AC_Charger_Discharger_1_6_Cells_GENUINE_.html
Maybe you need (power cord) adapter for your country too. Or new cord. It is same type as in laptop comters, from "wall" to  laptop power unit.
And how to use charger:

Always use "balance" charhing mode.

Next charger can make the job, but if you will buy bigger batterys, charging will take long time.

http://www.verticalhobby.com/kauppa/balancing-charger-for-cells-lipo-110-220v-p-719.html
3  Using Arduino / Motors, Mechanics, and Power / Re: making your own motors on: December 04, 2012, 10:39:58 am
Hobbyking sells kit of brushless motor, but it's more expensive than cheapest complete motors in "HK".
EDIT: Kit is out of stock too.
Brushless kit:

http://www.hobbyking.com/hobbyking/store/__5344__HXT_2730_DIY_kit.html

Example of small motor in "HK":
www.hobbyking.com/hobbyking/store/__21974__Turnigy_DST_1200_Brushless_Bell_Motor_1200kv.html
4  Using Arduino / Motors, Mechanics, and Power / Re: Rechargeable battery for 3 motors on: December 03, 2012, 01:21:19 pm
If you have no exact figures how heavy load you will give to battery, you may just try some battery, like lipo you thought earlier (1000mAh 3S1P 25C). It can be ok, because your stepper motors are small and servo hardly needs much power.
5  Using Arduino / Motors, Mechanics, and Power / Re: Rechargeable battery for 3 motors on: December 02, 2012, 10:31:06 am

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16331


First, I need a ~9v battery for the Arduino Mega (that one will do the trick with its 11.1v).

And then I need another battery for my motors. I will have 2 stepper motors ( http://dx.com/p/dc-5v-28ybj-48-stepper-motor-for-arduino-2-pcs-148819 ) and one servo ( http://dx.com/p/sg90-mini-servo-with-gears-and-parts-2kg-torque-35764?rt=1&p=2&m=2&r=3&k=1&t=1&s=133696&u=35764 ) ; they will be connected to the Adafruit motor shield.

I'm really new to electronics so I don't really know what kind of batteries are compatible and how much current / voltage I need !


Servos need 5 volts (6 V is possible too) and your stepper motors take 5 V too. Arduino works any voltage from 6 to 20, but 7-12 V is best choice.
You may change the higher voltage to 5 or 6 volt with part in next link, so called SBEC (UBEC makes (about) same thing).

http://www.hobbyking.com/hobbyking/store/__10312__Turnigy_5A_8_26v_SBEC_for_Lipo_.html

By the way, fully charged 11.1v (Lipo-) battery voltage is some 12,6 V or even 12,7 volts.
6  Using Arduino / Motors, Mechanics, and Power / Re: Rechargeable battery for 3 motors on: December 01, 2012, 05:13:20 pm
Hobbyking is good place to buy servos, (rechargeable) lipo-batteries and chargers. Quality of products can be difficult to know. Mostly it's ok, but can be poor.
You have to know needed voltage and current, after that it's easy to find battery. Leave some headroom above the specs.

http://www.hobbyking.com
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