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Old 11-21-2010, 12:58 PM   #1
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Default Batt to servo !

Does anyone know how to wire a 2s lipo directly to a 7950th servo ? Is it do able ?
Thanks
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Old 11-21-2010, 11:10 PM   #2
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Can it be done?
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Old 11-21-2010, 11:15 PM   #3
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You could do it but I dont think I would recommend doing it. If you want to do it just connect the positive and negative leads from the battery to the positive and negative of the servo, then just connect the signal wire to the rec.

Why I wouldnt do it:
  • No LVC...How would you know if you went too low?
  • 2s lipo is 7.4v nominal. Actual voltage full is 8.4v even high volt servos arent designed to take that much power.
  • Extra weight...

If this is about the M2 dig they say that they have released new firmware that is supposed to fix the compatibility issues with the CC Bec. I would try that before frying your expensive servo.
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Old 11-22-2010, 05:31 AM   #4
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Quote:
Originally Posted by SMR 510RR View Post
You could do it but I dont think I would recommend doing it. If you want to do it just connect the positive and negative leads from the battery to the positive and negative of the servo, then just connect the signal wire to the rec.

Why I wouldnt do it:
  • No LVC...How would you know if you went too low?
  • 2s lipo is 7.4v nominal. Actual voltage full is 8.4v even high volt servos arent designed to take that much power.
  • Extra weight...

If this is about the M2 dig they say that they have released new firmware that is supposed to fix the compatibility issues with the CC Bec. I would try that before frying your expensive servo.
HS-7950TH is designed to operate on a two cell LiPo Pack
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Old 11-22-2010, 07:23 AM   #5
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Quote:
Originally Posted by Fattymojo View Post
HS-7950TH is designed to operate on a two cell LiPo Pack
SMR1510RR makes a good point..... The 7950TH is designed to run off of the nominal voltage of a 2-cell LiPo pack.

If someone want to hook their $120 servo straight to a battery I say have at it! But for me, I'm going to install $25 worth of insurance in between the two.

Narly1
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Old 11-22-2010, 08:38 PM   #6
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Quote:
Originally Posted by narly1 View Post
smr1510rr makes a good point..... The 7950th is designed to run off of the nominal voltage of a 2-cell lipo pack.

If someone want to hook their $120 servo straight to a battery i say have at it! But for me, i'm going to install $25 worth of insurance in between the two.

Narly1
+1.
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Old 11-22-2010, 09:51 PM   #7
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Quote:
Originally Posted by Narly1 View Post
SMR1510RR makes a good point..... The 7950TH is designed to run off of the nominal voltage of a 2-cell LiPo pack.

If someone want to hook their $120 servo straight to a battery I say have at it! But for me, I'm going to install $25 worth of insurance in between the two.

Narly1
Thats why I'm asking
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Old 11-22-2010, 10:56 PM   #8
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Quote:
Originally Posted by Narly1 View Post
SMR1510RR makes a good point..... The 7950TH is designed to run off of the nominal voltage of a 2-cell LiPo pack.

If someone want to hook their $120 servo straight to a battery I say have at it! But for me, I'm going to install $25 worth of insurance in between the two.

Narly1
My quote was right off the Hitec site. If you dont trust them its up to you
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Old 11-23-2010, 10:03 AM   #9
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Quote:
Originally Posted by Fattymojo View Post
My quote was right off the Hitec site. If you dont trust them its up to you
I don't know too much about lipo batteries, but 8.4 volts is 8.4 volts correct? That servo is rated for a max of 7.4 period. Anything over that will fry it. I would think this applies to any type of battery. The Hitec site is most likely referring to running the servo off the BEC on the esc and plugged into the receiver, not running direct current from the battery to the servo. I agree with Narly1, put a CC BEC in there and program the voltage...if you fry it by not doing so...you're out $120 bucks...
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