Society of Robots - Robot Forum

General Misc => Misc => Topic started by: ukesh on September 15, 2009, 08:47:16 AM

Title: Batteries used with axon
Post by: ukesh on September 15, 2009, 08:47:16 AM

 I'll be using two servos and 5 IR sensors along with the axon for my bot. can 12V Li-ion batteries be used with axon? If not, what will be mAh rating of the battery(NimH) required for my bot?

servos: http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2_5&products_id=187 (http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2_5&products_id=187)
sensors: http://www.pololu.com/catalog/product/958 (http://www.pololu.com/catalog/product/958)

Title: Re: Batteries used with axon
Post by: Admin on September 15, 2009, 01:06:25 PM

Please read:
http://www.societyofrobots.com/axon/axon_datasheet.shtml (http://www.societyofrobots.com/axon/axon_datasheet.shtml)

Absolutely max voltage for the Axon is 10V.

As for current . . . the HS-311 uses about 0.4A average, but depends on a lot of other factors, too.

Also:
http://www.societyofrobots.com/axon/axon_FAQ.shtml#sharp_ir_reset (http://www.societyofrobots.com/axon/axon_FAQ.shtml#sharp_ir_reset)

Title: Re: Batteries used with axon
Post by: ukesh on September 15, 2009, 07:13:16 PM

Quote from: Admin on September 15, 2009, 01:06:25 PM

Please read:
http://www.societyofrobots.com/axon/axon_datasheet.shtml (http://www.societyofrobots.com/axon/axon_datasheet.shtml)

Absolutely max voltage for the Axon is 10V.

As for current . . . the HS-311 uses about 0.4A average, but depends on a lot of other factors, too.

Also:
http://www.societyofrobots.com/axon/axon_FAQ.shtml#sharp_ir_reset (http://www.societyofrobots.com/axon/axon_FAQ.shtml#sharp_ir_reset)

i'll be using my bot for line following application. So the bot must work at least for 15 mins continously. so an 8 volt li-ion battery can be used ?

Title: Re: Batteries used with axon
Post by: Admin on September 15, 2009, 07:21:30 PM

Its important that you look through the manual. It answers all of your questions :P

Please read:
http://www.societyofrobots.com/axon/axon_datasheet.shtml (http://www.societyofrobots.com/axon/axon_datasheet.shtml)

Title: Re: Batteries used with axon
Post by: SmAsH on September 16, 2009, 02:29:01 AM

Yes, the 8V battery will work, but can the servos take 8v?
Most hobby servos have a range from 4V8-7V2. 8V will most likely fry them quickly. (or get hot fast)

Title: Re: Batteries used with axon
Post by: izaktj on September 17, 2009, 11:03:55 PM

A lot of servos used for aerial RC support 11.1V batteries, but I'm not sure if the ESC reduces it though.

Title: Re: Batteries used with axon
Post by: billhowl on September 18, 2009, 01:02:31 AM

BEC stands for Battery Eliminator Circuit
A BEC is basically a step down voltage regulator. It will take your main battery voltage (e.g. 11.1 Volts) and reduce it down to ~5 Volts to safely power your receiver and servos.
http://www.dimensionengineering.com/BECFAQ.htm (http://www.dimensionengineering.com/BECFAQ.htm)

Title: Re: Batteries used with axon
Post by: Admin on September 18, 2009, 04:45:46 AM

Quote from: billhowl on September 18, 2009, 01:02:31 AM

BEC stands for Battery Eliminator Circuit
A BEC is basically a step down voltage regulator. It will take your main battery voltage (e.g. 11.1 Volts) and reduce it down to ~5 Volts to safely power your receiver and servos.
http://www.dimensionengineering.com/BECFAQ.htm (http://www.dimensionengineering.com/BECFAQ.htm)

But at a really poor efficiency . . .

Just buy a 6V battery, silly people!  :P
I mean, why put a heavier 8V+ battery on a flying robot when ~1/3 of the energy will be lost from a voltage regulator?

Title: Re: Batteries used with axon
Post by: ukesh on September 18, 2009, 09:19:55 AM

thnx guys! Ended by buyin an 7.2V battery.