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Old 10-14-2009, 01:06 AM   #1
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Default 1/12 with lipo receiver pack & voltage regulator

What are you using as a receiver 2s lipo and voltage regulator ?

I'm looking at going this route for my 1/12 with 1s lipo but still investigating possibilities.

Some pics of your car showing how to put this all on the chassis would be nice.

Thanks
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Old 10-14-2009, 01:35 AM   #2
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you don't need a regulator,we ran 4 cell promod 3years ago running lipo receiver pack's zero issues. leave speedo switch off,only turn on receiver pack switch.
receiver pack mah usage roughly 60-85 mah per run depending on class and servo draw
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Old 10-14-2009, 02:19 AM   #3
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Didn't it ruin the servo if you're putting 7.4v directly into the receiver ?
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Old 10-14-2009, 09:47 AM   #4
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The setup as described is typical.
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Old 10-14-2009, 09:49 AM   #5
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I think it will hurt them eventually. I have had Nitro off road guys tell me the robot servos will handle it and get faster with the greater voltage....I personally will be experimenting with a burned out SPY speedo (FETs are cooked) as a way to drop the power down....I will be stripping the case off and just using the board for the BEC to run a servo and PT I think it will work...I have some shrink wrap somewhere that will make a tidy cover...
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Old 10-14-2009, 11:01 AM   #6
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If you are really concerned about the voltage, buy a BEC regulator from an airplane or use two diodes in series. The diodes wont drop it all the way to 6 volts, but it will be between 7 and 4.6 volts depending on voltage of you 2S RX pack. Cost for the diodes should be less than $1.00.

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Old 10-14-2009, 11:05 AM   #7
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Wait for the ESC CRC was running at the IIC
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Old 10-14-2009, 11:25 AM   #8
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depends on your electronics. ko said they support 7.4v, futaba said they will not support 7.4v
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Old 10-14-2009, 02:09 PM   #9
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Quote:
Originally Posted by JayL View Post
Wait for the ESC CRC was running at the IIC
Downfall on that is that you wont be able to update to new versions of software.
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Old 10-14-2009, 02:29 PM   #10
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Quote:
Originally Posted by theisgroup View Post
depends on your electronics. ko said they support 7.4v, futaba said they will not support 7.4v
Maybe Futaba won't warranty the servos but they will handle it. I'm pluggin' RX pack directly into the receiver and it works great.
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Last edited by quietstorm76; 10-14-2009 at 03:12 PM.
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Old 10-14-2009, 02:34 PM   #11
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Quote:
Originally Posted by quietstorm76 View Post
Maybe Futaba won't warranty the servos but they will handle it. I'm pluggin' RX pack right directly into the receiver and it works great.
exactly
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Old 10-14-2009, 02:39 PM   #12
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Quote:
Originally Posted by slotracer577 View Post
If you are really concerned about the voltage, buy a BEC regulator from an airplane or use two diodes in series. The diodes wont drop it all the way to 6 volts, but it will be between 7 and 4.6 volts depending on voltage of you 2S RX pack. Cost for the diodes should be less than $1.00.

John
What kind of diodes?
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Old 10-14-2009, 02:58 PM   #13
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standard power diodes. they are available at radio shack in the parts drawers. .5 watt or less, they will be black with a silver band on them. Silver band end goes in the direction of "flow" or away from the + on the battery.
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Old 10-14-2009, 03:34 PM   #14
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So went out racing tonight and did 2 things (running 1/12 scale - TP 5000 1s lipo - Ezrun 60A esc - Hitec mini servo - Spektrum receiver):

1) ran the car without my 7.4v 150mah receiver pack. Car ran ok, no noticable problems. Servo probably slower but never went out.

2) tried to run the car with a 7.4v 150mah receiver pack paired to a Nosram regulator. So I pulled the red wire out of the esc plug wich goes into the receiver (to enable the bec), then connected the regulator to the receiver followed by connecing the receiver pack to the regulator. Only used the power switch of the regulator to turn on the system.

Result : power to the servo but nothing for the esc ? When I also used the power switch of the esc I got throttle response.

I thought using the esc power switch was out of the question.

I'm confused now.

PS : didn't have the ... to directly connect the receiver pack to the receiver.
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Old 10-14-2009, 03:39 PM   #15
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Intellect IP will release LiFe 6.6v battery for 1/12
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