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Align 5.1V Two-Way Step-Down Voltage Regulator

FARRL

Senior Heliman

LEESBURG GA. USA

I have an Align 5.1V Two-Way Step-Down Voltage Regulator that I just put on. I was running a JR 8900G servo and a Align B6T 2 in 1 Voltage Regulator. After flying I felt the servo and it was hot not burning hot too hot. I went home and checked the voltage, it was 5.6 going to the servo. I put a Spektrum VR5203 on and checked the voltage it was 5.2 like it was supposed to be. Anyone else have tis problem?

05-25-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

problem

Last night when I added the 5.1V stepdown on my heli it locked the servo full ATV to the left. No input on the radio worked at all. WHen I removed the stepdown the servo worked perfect on just the regulator. I have no clue whats up with it.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-20-2010 Over year old.
T-Squared

Senior Heliman

SMRCF, GA

Remember that all that is in a step-down unit is a silicon diode so all it does is drop the battery voltage by 0.7V Often that is not enough to get you into the working range for a 4.8V servo.

They are OK if you are feeding them from a regulated supply of less than 6V such as from a BEC or other regulator but not OK for a direct feed from a 5 cell NiMH of 2S LiPO.

Ron.
Oops - that's not what I meant to do!

09-20-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

servo

THe 611 amp reads the voltage regulated to 5.8Volts. If the step downs drops that by 0.7V that would put me at 5.1V and it should still work. I just cant figure out how just adding the stepdown causes the servo to "lock" in one direction. That has me confused.

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-20-2010 Over year old.
T-Squared

Senior Heliman

SMRCF, GA

Sounds like you have a broken wire or bad connector in your step-down unit.

Ron.
Oops - that's not what I meant to do!

09-20-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

stepdown

I was thinking that also but when I put it before the gyro to check it I found the exact same issue, The gyro amp reads 5.1V but one again the servo jumps to one side and locks. I have no clue. I will work with it again tonight.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-20-2010 Over year old.
T-Squared

Senior Heliman

SMRCF, GA

Open ground wire or a short from the signal line to one of the other two could cause that. My money is on a fault in your step-down. It only has 3 wires, 2 of which go directly from one connector to the other. The power line has a diode in series. Not hard to check.

Most likely is a bent pin in the female connector or a broken wire.

Ron.
Oops - that's not what I meant to do!

09-20-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

check

I will check it out tonight. I just got it and that would suck to have that not work. I know it is only like $7 but on a budget I have to stay within that budget and that little money would hurt. I will check it tonight.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-20-2010 Over year old.
T-Squared

Senior Heliman

SMRCF, GA

Sent you a PM

Ron.
Oops - that's not what I meant to do!

09-20-2010 Over year old.
BarracudaHockey

rrMaster

Jacksonville FL

Putting it before the gyro, when the gain lead is connected, does nothing.

Andy
AMA 77227
http://www.jaxrc.com

09-20-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

testing

Actually it does plenty. It allows me to see the exact voltage going to the gyro through the 611 amp screen. Thta is all I wanted to do to make sure that the stepdown was working properly. It is not for operational purposes just testing the voltage.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-20-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

troubleshooting

OK OK OK here is my findings and boy are they stupid!!! So with a fresh mind I went back out to the shop and checked on all the electronics. They all looked good and hooked up. I cut the heatshrink off the 5.1V stepdown to check the wiring and diodes. Everything looked good. I then re hooked up the 5.1V stepdown to the servo. Made sure the connection was good. I then hooked up the other end to the Gyro amp. I looked at it real good and I noticed it would fit both ways. I checked to confirm the plug was in the right way (colored wires matched the way they suppose to) and turned the heli on. To my surprise IT WORKS!!! It pays when you are tired and sleepy to sit it down for the next day and try it again. I guess I hooked it up wrong. We are all hooked up and ready to go again.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-22-2010 Over year old.
BarracudaHockey

rrMaster

Jacksonville FL

Guess thats why Futaba keys their connectors

Andy
AMA 77227
http://www.jaxrc.com

09-22-2010 Over year old.
venture_flyer

Senior Heliman

Fredericksburg VA

keyed

I just need to start learning that when I am sleepy I dont need to be working on my heli I just need to wait till the next day. I have never flown futaba at all in my 9 years of flying. I have always flown JR but I have always used futaba for gyros and rear servos.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

09-22-2010 Over year old.
T-Squared

Senior Heliman

SMRCF, GA

Glad to hear that you got it figured out. Believe me, I've done equally dumb (in fact more dumb) things!!

Ron.
Oops - that's not what I meant to do!

09-22-2010 Over year old.
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Align 5.1V Two-Way Step-Down Voltage Regulator

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