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Apr 08, 2011, 06:42 PM
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lufkin,tx USA
Joined Nov 2003
87 Posts
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Voltage regulator for TXmitter battery
I recently put a 3 cell lipo in my Hitec optic 6 transmitter and have had great success with it, until I bought a 2.4GHz Hitec module for an upgrade. With a fully charged battery which was 12.1v it apparently fried the module. Tech support told me it can't handle the voltage and needs a regulator or go back to the Ni-Cad pack. I need some help in locating the right regulator to drop the voltage to around 10v. Is there an easy plug in or do I have to build one?
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Apr 08, 2011, 07:58 PM
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Orleans, MA
Joined Feb 2007
1,804 Posts
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Three forward-biased diodes, in series, in the power input should drop your voltage about 2.1 volts (.7 x 3). They would probably only need to handle about 500ma to safely conduct the transmitter current. A local Radio Shack should be able to supply them.
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Apr 08, 2011, 08:04 PM
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San Fernando Valley, California, United States
Joined May 2003
3,715 Posts
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Have you considered using some 2000mah eneloop cells instead? No regulator necessary.
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Apr 08, 2011, 10:03 PM
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United States, OH, Toledo
Joined Jan 2005
1,899 Posts
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hi there from Toledo
I recently went to 3s lipo 2200 mah for my xmtr, a Futaba 9cap super. I used two diodes in series in a 3" servo extension in the red lead. This modified extension was connected between the battery and the xmtr. The voltage was reduced by about 1.4 VDC or 11.2VDC which is less than the fully charged voltage of 8s nicads or 8s nimhs. Of course Charging will be handled out of the transmitter by a balancing charger and then reinstalled. Safety first with lipos for sure. ciao -rjf |
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Apr 09, 2011, 08:16 AM
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Miami Lakes, Florida, USA
Joined Mar 2003
8,428 Posts
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It never ceases to amaze me what extreme measures people will go through to convert their transmitters to LiPo cells when they can use low-self-discharge NiMh cells and get the same benefits and more without any drawbacks whatsoever.
Miami Mike's Top Ten Reasons to Use NiMh Cells in Your Radio |
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Latest blog entry: FSS #4 rescheduled for 9/7 & 9/8
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Apr 09, 2011, 11:25 AM
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USA
Joined Jan 2002
3,955 Posts
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Quote:
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Apr 10, 2011, 10:18 AM
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Salem, Oregon
Joined Dec 2008
117 Posts
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+ 1 on using Eneloops. I get mine here: http://www.hangtimes.com/txpacks.html
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Apr 10, 2011, 11:37 AM
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Germany
Joined Dec 2003
4,320 Posts
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Install this to get teh voltage down:
http://dimensionengineering.com/DE-SWADJ.htm Note, that the voltage alarm is compromised by installing it. Otherwise, use multiple diodes in series as explained here: http://www.rcgroups.com/forums/showt...=2#post6511569 http://www.rcgroups.com/forums/showt...=606427&page=3 |
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