Replies to This Discussion

Permalink Reply by UAgroV on February 21, 2012 at 3:01pm

Hi Adam,

First, ensure you are pulging the wires in the rigth way, allways +5v (red wire) to center, and -v (black wire) to the edge.So yoiu got to roll it 180º from avobe to change from one rail to another. You can see the pins sing here: http://code.google.com/p/arducopter/wiki/APM2RC

i haven´t seen the APM2 board scheme or having the pleasure of touching one but i think the jumper will joint your output and input +5v pins. To test this, you can use a multimeter, if one of the jumpers pins has continuity with une of the rails pins (whatever) and the other pin has continuity with the other rail pins, the jumper will joint theses lines of pins, Test your jumper swicth continuity (The little plastic part you use to put it on) can use a piece of wire core to put it on over the jumper board pins to test it too.

Any way, Measure the voltage between + and - pins in input rail whem "powered" from output rail and jumper on. If you got +5v +/- the jumper is supous to be working and you got power on input rail, so anything between jumper and main board must be wrong.

Hope it usefull for you.

Marcos.

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Permalink Reply by Javier Robaina on February 28, 2012 at 9:21am

Hello, I have a similar problem in APM2 I have 5v output. coming from a BEC.

The problem is that when you connect a servo, according to wiki, negative on the outside.The low voltage of 5v to 1.40v.
With the consequence that there is no movement in the servos.

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3D RoboticsPermalink Reply by Chris Anderson on February 28, 2012 at 9:35am

Are you sure the jumper is on the right pins and is seated correctly?

http://code.google.com/p/arducopter/wiki/APM2board

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Permalink Reply by Javier Robaina on February 28, 2012 at 9:37am

If, thanks Chris, I just concluded that I had to feed from the output of the APM and the entryand Rx. Thanks, all working correctly now.

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Permalink Reply by Andrew Moisejev on March 4, 2012 at 10:09am

My board behaves the same way.

With the jumper on, I'm only getting 1.32V on the input rail when powered from the output rail. But, strangely enough, when powered from the input rail and with the jumper on, there are full 5V on the output rail.

Looking at the bunch of similar posts.. maybe a batch of boards got messed up somehow (like a diode being inserted the other way or something)?

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3D RoboticsPermalink Reply by Chris Anderson on March 4, 2012 at 10:59am

Andrew: Please contact customer support (help@3drobotics.com) for a RMA.

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Permalink Reply by Andrew Moisejev on March 6, 2012 at 12:23pm

Chris,

Thanks! But I'm actually okay with it. I have no need to power the board from the output pins (yet..)

And we have waited long enough for the boards, I just want to fly this thing already :)

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Permalink Reply by Rui Manuel Cravo Marques on March 4, 2012 at 11:38am

And are you powering from output chanel 3 ?

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Permalink Reply by Andrew Moisejev on March 4, 2012 at 11:44am

I have a separate UBEC and I'm connecting it's output to a free channel on a rail.

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Permalink Reply by Rui Manuel Cravo Marques on March 4, 2012 at 11:49am

try to connect it to output 3 just in case, as described in the page, just to check !

 

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Permalink Reply by Andrew Moisejev on March 6, 2012 at 12:12pm

Alright, I've tried that, and, well, it's the same story when using output 3 or any other channel. The juice just won't go from output to input rail, but happily flows in reverse direction.

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Permalink Reply by Cody O. on March 7, 2012 at 6:01am

I know this is kinda simple, but...

The pins for the jumper are 2mm spacing, and not the standard 2.54mm like all the other pins on the board.  Are you using a properly sized jumper?

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