Pages: [1]   Go Down
Author Topic: Does 7.2VDC RC battery pack kill 6VDC servos?  (Read 658 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Full Member
***
Karma: 3
Posts: 221
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I have been using 7.2VDC battery pack usually used for RC vehicles. A few days ago, some EZ-Robot S08NF STD servos died. Now, some Power HD 1501 MG servos died. I'm afraid to use Futaba S3003 servos with the 7.2 VDC battery pack. Any suggestions?
Logged

0
Offline Offline
Tesla Member
***
Karma: 141
Posts: 9470
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Any suggestions?

Follow the min and max voltage recomendations for the servos.
Logged

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   smiley-cool

Phoenix, Arizona USA
Offline Offline
Faraday Member
**
Karma: 39
Posts: 5557
Where's the beer?
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Most standard servos are rated for 4.8 to 6.0 VDC (generally for the electronics inside). There are models of servos out there designed for higher voltages, but as zoomkat noted, you need to check the datasheets for your servos before applying power. When in doubt, try 5 VDC first.
Logged

I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

Offline Offline
Full Member
***
Karma: 3
Posts: 221
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

How do I create a circuit that reduces 7.2VDC to 6.0VDC?
Logged

Darlington, UK
Offline Offline
Full Member
***
Karma: 0
Posts: 125
Shaamo
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Get a BEC for off the shelf voltage conversion, they're pennies
Logged

Left Coast, CA (USA)
Offline Offline
Brattain Member
*****
Karma: 361
Posts: 17262
Measurement changes behavior
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

 The 7.2 volt battery pack sounds like a Li-Po pack? If so it's output voltage will be proportional to it's state of charge reaching 8.4vdc at full charge and down to 6vdc where you should stop drawing current or risk overdischarging the pack which can cause permanent damage to the battery. But that aside running most servos at higher then 6.0 is a good way to start and build up a collection of ex-servos.

Lefty

Logged

Online Online
Faraday Member
**
Karma: 82
Posts: 3831
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

How do I create a circuit that reduces 7.2VDC to 6.0VDC?

Easiest way is probably to get a 7806 6v regulator.... if that's unavailable then the 7805 5v is very very common and will be ok with your servos if they are the 4.8 to 6v ones. Read about them here.
Logged

Although I answer in good faith, remember always: Your Mileage May Vary.
Get me on LinkedIn: za.linkedin.com/in/jimbrownza/

Belgium
Offline Offline
Sr. Member
****
Karma: 1
Posts: 281
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Search ebay or hobbyking for UBEC's. These devices will step down the voltage to 5 or 6V and are used in RC cars/planes to power the servos. Your local RC store will probably have some in stock... Most "RC" servo's are made for a max voltage of 6V.
Logged


Pages: [1]   Go Up
Jump to: