Stepping down volt to Receiver - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-24-2016, 03:03 PM   #1
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Stepping down volt to Receiver

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I am closing in on finishing a build. I am planning to use Li-FE batteries and need to step voltage down to 6 volts.
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Old 06-24-2016, 03:10 PM   #2
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Re: Stepping down volt to Receiver

What receiver and servos are you running? Most modern equipment will handle 6.6V (and the initial 7.2v they start at fully charged) without any problems.
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Old 06-24-2016, 03:10 PM   #3
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Re: Stepping down volt to Receiver

receiver? servos? some are fine with 6.6 because a "6 volt" pack nimh is actually 7.25 fully charged.
digital servos? because if analogue and not many a simple 4 amp or so device from Hobby King will do the job.

I see there are 2 of us.
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Old 06-24-2016, 05:44 PM   #4
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Re: Stepping down volt to Receiver

Just a note: If you wire a Silicone diode in series with the battery it will drop the voltage .7V no matter how many milliamps you use.

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Old 06-24-2016, 06:15 PM   #5
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Re: Stepping down volt to Receiver

On my first two builds using LiFE packs I ran the Castle BEC Pro 20A set for 6V. Figured I needed the rating for the servoless retracts and the fact they were buried inside the fuse with minimal airflow, (ESC and BEC ratings are predicated on a minimum cooling airflow so in stagnant air they would be less than max).

In at least 4 subsequent builds ran them straight with servos of all types and ages. None have shown any problems, but it would be good to at least check all the components for voltage ratings. You don't want to install one with only 4.8V max rating and there are some specialized servos that are, most I have seen are for heli tail apps.

Along with the LiFE it is important you look at the other components of your power system. The standard slider switches supplied with Rx setups are only rated for 4A and digital servos and high servo counts can push your demand above that. Depending on your setup you may need to bypass the Rx and supply the servos independently.
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