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Topic: 1 battery for powering arduino, motors, and raspberry pi (Read 5 times) previous topic - next topic

jombo

Dear all,

I am working on my own robot.
It has:
   2 DC motors which are connected to 5 AA bateries.
   a raspberry pi which is connected to a 5v miniusb phonecharcher
   an Arduino, which is connected to/powered by a USB port of the raspberry pi
   a servo which is connected to the same 5 AA bateries as the 2 DC motors.
   a microsonic distance sensor which gets its power from the aruino.

The idea is to have the whole setup running on 1 power source consisting of one or more rechargeable batteries.

Now I am a bit of a noob when it comes to electronics.
Can anyone suggest what battery I should use, and maybe give some tips on how to set it up?

At the moment de motors slow down if i use the servo.(because they are on the same 5 aa batteries.) How can I prevent that with the new powersource which will also power the raspberry pi and the arduino?

Even though English is not my 1st language,I hope I made my question clear.

Regards,
Jombo


TeslaIaint

Can you send us links to the motor and servo data sheets so that we can see the voltage and current needs of them?

jombo

i TeslaIaint,
Thanks for answering.

The motor specs can be found here http://iprototype.nl/products/robotics/servo-motors/dc-geared-motor/ (under the head Motor Specificaties:)

                 3V              6V
No-load speed      100 RPM           200 RPM
No-load current            60 mA       71 mA
Stall current       260 mA       470 mA



The servo: http://iprototype.nl/products/robotics/servo-motors/servo
Voltage    4.8V ~ 6V


Let me know if you have more questions.

Regards,
Jombo

fungus


Dear all,

I am working on my own robot.
It has:
   2 DC motors which are connected to 5 AA bateries.
   a raspberry pi which is connected to a 5v miniusb phonecharcher
   an Arduino, which is connected to/powered by a USB port of the raspberry pi
   a servo which is connected to the same 5 AA bateries as the 2 DC motors.
   a microsonic distance sensor which gets its power from the aruino.

The idea is to have the whole setup running on 1 power source consisting of one or more rechargeable batteries.

At the moment de motors slow down if i use the servo.(because they are on the same 5 aa batteries.)

How can I prevent that with the new powersource which will also power the raspberry pi and the arduino?


You could replace your phone charger with something like this: http://www.ebay.com/sch/i.html?_nkw=5v+usb+boost

Connect it across three of the AA batteries (five is too much input). It should adapt to the power drops.

Be sure to add decoupling capacitors on the output from that board - at least a .1uF ceramic and a bigger electrolytic (for speed+capacity).
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

giantsfan3

#4
Oct 19, 2012, 02:52 pm Last Edit: Oct 19, 2012, 03:20 pm by giantsfan3 Reason: 1
A Li-ion / LiPo battery would do well, such as this: https://www.sparkfun.com/products/341
Alternatively, a standard alkaline AA or AAA battery, such as this: https://www.sparkfun.com/products/9274

For either of the above, you might of course need to put two or more cells in series so as to get the voltage desired.

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