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Topic: Servo help? (Read 1 time) previous topic - next topic

Asinger93

I'm doing my first robot with servos, and I was wondering where I could get some cheap (under $20/piece) servos that could be used on the Duemilanove without any additional shields. Any suggestions would be appreciated!

bld

#1
Oct 21, 2010, 03:58 pm Last Edit: Oct 21, 2010, 04:02 pm by bld Reason: 1
All servo's can be used...

http://www.dealextreme.com/search.dx/search.servo~r.23893206
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cybertim

For one i know that the mg995 will not work without external power supply.
But if you are going to use an external power supply, all servo's will work, and there is never any special shield needed. Shields will only make your connecting life easier.


vinceherman

I do not know what kind of power you need out of your servos, so I cannot recommend a direct servo model.

I used Hitec HS-311 which are about $8 each.

Go search for HS-311 on towerhobbies.com
3 for $23.10

(Killer price.  I bought 20 of them for about a dollar more each! )


zoomkat

Inexpensive servos that may have free shipping.

http://www.hobbypartz.com/kahaoubrmo14.html
http://www.hobbypartz.com/topromisesg9.html
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

Asinger93

thanks. What power supply should I use for a 2-servo system? It's going to be rolling a lightweight body (probably plastic or aluminum), so it doesn't need to be a power house.

vinceherman


vinceherman

Are you going to be using the servos to power the wheels?  If so, my recommendations above are not accurate.
You want continuous servos.  The ones I linked to are 120° servos.

vinceherman

Another option might be to go with a rechargeable backpack battery.
http://www.liquidware.com/shop/show/BP/Lithium+BackPack

A bit on the expensive side, but nice.  Recharges from the mini usb jack.

Asinger93

yes, sorry I forgot to mention that they have to be continuous motion.

zoomkat

Below are the typical servo type batteries.

http://www.hobbypartz.com/lipocar.html
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

AWOL

#11
Oct 27, 2010, 08:45 am Last Edit: Oct 27, 2010, 08:48 am by AWOL Reason: 1
Quote
yes, sorry I forgot to mention that they have to be continuous motion

Many common servos are easily hackable for continuous rotation (I assume that's what you meant), even by people like me with ten thumbs.

(And please, when you've hacked them, don't call them servos, OK?  ;)   )
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