6dof v4 P0.15 broken

Archive SparkFun Site Questions/Comments
1

in both binary and acii output of the yaw gyro does not work (P0.15).

in ascii is is around value 264 and it looks like it is floating becouse it reacts a littlebit on action with the roll gyro. but it doesn’t do anything with the yaw gyro like it should do.

when i measure on pin P0.15 i see the yaw gyro does work, and gives proper values when moving, and is in de same range like the other gyro’s

so, i am sure the yaw gyro works.

also try’d to remove the sensor board.

and test if the gyro pins (P0.12, P0.13, P0.15) value go to zero when connected to ground.

now running without sensor board, all gyro values are floating around ~255,

when connection with ground, Pitch and roll values get zero, but yaw still is ~255

so, i am now pretty shure something is wrong with the lpc2138 micro controller. and could be as simple as something wrong with flash image, or some devices on the chip not properly initialised.

I got the 6dof v4 sensor just 1 day ago, and didn’t do any programming or flash things yet.

but still, what do you think

is pin P0.15 broken? is it possible for a new device.

or did anyone else experience something simular?

or other suggestions?

2

after a lot of measuring

I found out that the pads of the lpc2138 micro controller where bad, between the wire (under green stuff) and the pad.

as if it was broken exactly on the edge.

so i removed a littlebit of the green stuf, and resoldered.

the wire, (did that for all 3 gyro connections)

now the broken pin worked.

but also the noise on the other previously working gyros was gone.

(only 1 ad-converter step noise level, really low)

becouse there also was a lot of noise in the magnetic sensor wires, and in the accellometer sensors, I decided to resolder them.

but that turned out not so good idea.

the sensor pads (probably becouse they are badly connected to the wires)

came lose, and connected each other, just floated away. :frowning:

now i can trow away the controller board.

anyway, sparkfun, check you pcb creation process.

there are some serious problems with the pads.

maybe stencel edges are to sharp cutting the wires of the pads or too much pressure, someting like it. it seems I am not the only one with noisy connections

So check it, I hope I didn’t ruin my controller board for nothing!