Servo Voltage

Servos are spec'd to run between 4.8V and 6V, but battery packs are
often putting out 7.2V or more. Can the servos safely be powered at
more than 6V? How high can voltage typically be before running into
problems?
Reply to
pdotson
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I've heard of jitters at fully charged 6V RX batts but it may have been the RX giving the trouble. They do sell regulators now days. You can use a 2 cell li-po to run your airborn pack mk
Reply to
Storm's Hamilton
This is the reason for the "BEC" battery eliminator circuit provided with most 2 - 3 channel receivers as used in RC Cars, Boats, small EP Planes with simple on/off motor functions. Whilst many standard servos will operate upto 7.2V users operating 5 cell NiCad packs must be very aware of over voltage killing servos either soon after purchase during the "burn in" period of any electronic widget or over an indefinite period. This especially so when 5 cell packs are fresh of the charger and has a high float voltage. A number of digital servos were burnt out at local track when racers started to use 2 cell 7.4v LiPol packs - all now make sure a voltage regulators (5.5 or 6V output available) e.g.
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seen in large RC racing boats and large scale aircraft are also installed. Note a minimum of 5A regulator is required for digital servo use and preferred for most applications - those in older 2 ch RX are only 1.5A out to servos. Drain by stalled or binding servos can be very high, especially on higher voltages: Batteries - graphic detail of stalled or binding servo ***
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the specs on the BEC of all aircraft ESC and many are rated for max 2 servos or 3 micro servos. In need, lift tab on plug, remove red (+) wire from RX lead and tape backward onto lead for future use in another model. Much more info on my web page. Regards Alan T. Alan's Hobby Model & RC Web Links
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Reply to
A.T.

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