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Permalink Reply by Thomas J Coyle III on July 3, 2009 at 6:40pm

Partick,

RC receivers are designed to work with rechargeable batteries or an ESC/BEC which usually put out 5 to 5.2 volts. Some of the new 2.4GHz receiver can work up to 9 volts. It all depends on the make and model of the receiver. Your 8.4 volt battery will definitely fry an RC receiver designed to work between 5 - 6 volts.

Regards,
TCIII

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Permalink Reply by Patrick Mccabe on July 3, 2009 at 6:50pm

yes i do have a ESC, so it will work?

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Permalink Reply by Patrick Mccabe on July 3, 2009 at 7:00pm

would this work

receiver- http://r2hobbies.com/proddetail.php?prod=rcps61411

transmitter- http://r2hobbies.com/proddetail.php?prod=rcps61206_61411

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Permalink Reply by Joseph Glanville on July 3, 2009 at 11:22pm

That receiver can be powered by up to 8.6V so yes.
Normally one would use what is known as a regulator or a switchmode power supply to bring the voltage down.
See BEC or similar system.

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Permalink Reply by Patrick Mccabe on July 4, 2009 at 7:43am

i didnt see the 8.6v part, maybe you were looking at 4.8-6v and got confused. Its 4.8 to 6 volts, but like Thomas said "ESC/BEC which usually put out 5 to 5.2 ", i have a ESC. So i am good.

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Permalink Reply by James Pearson on October 13, 2010 at 3:56pm

Just going to thrown in another solution I was considering encase my ESC did not put out a safe 5-6 volts. Its also possible to use a 7805 voltage regulator. Or maybe there is a problem with doing this... Any one feel to point out a problem with doing this. Though it sounds as if its not necessary with modern speed controllers already performing this task.

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Permalink Reply by Ken on October 13, 2010 at 5:20pm

Patrick,

"i dont get why most rc receivers have a small voltage rating that are lower than the batteries have."

That is historical / backwards compatibility. Way back when rocks were new and I was roughly your age, R/C gear came with a little battery box that held 4 "AA" cells. "Regular" (carbon zinc or alkaline) cells are 1.5v; rechargeable nicad cells are 1.2v nominal.

4 x 1.5 = 6v
4 x 1.2 = 4.8v

Yeah, then we got NiMH, and LiPo, etc.

Moral of this fable: be careful what standards you create; they may long outlive you. :)

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Permalink Reply by Patrick Mccabe on October 13, 2010 at 5:34pm

wow old thread popping up again :)

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