Broken cRIO

[ironbears]

Hey today team 854 the Ironbears have relized after 3-4 hours of testing that our cRIO is broken. we heard a faint buzzing noise from the cRIO. we immediatly shut off power and disconnected everything but power. the noise still buzzed. we sent off an email to karen rosenthal (canadian teams know who she is) any ideas what messed up. wiring is fine signals are 100%.

help is most appreciated

[Jim E]

Are you sure the buzzing noise isn't coming from the Power Distribution board?

Typically, this type of noise is heard from ringer circuits boosting a voltage up from say 12V to 24V.

There was mention of this in the controller chapters. If the cRio lights correctly, and performs correctly, (you can use the serial out to verify correct boot sequences) then there may be nothing wrong at all.

Team MARS = 1.523 AU from the SUN

[crake]

Is the cRIO acting normal other than the buzz? Is the buzz loud (can you hear it from a couple of feet away?).

Buzzing can come from the internal power supply when it current limits or when it is "starved". If you have a multi-meter, can you please check the voltage across the supply input to the cRIO?

[whitetiger0990]

What do the status lights say?

Does it get an IP? Try a null modem to the serial port.

Are you sure it's the cRIO? The PD does buzz.

The cRIO needs between 19 to 30V. Check to see if the wires are providing it between those limits.

If you do end up sending it it, I believe they send you one as soon as possible and you send the cRIO back, opposed to you sending it in and having to wait a long time.


I find it hard to believe that you truly broke it. These things can take a beating. Didn't they throw one off a building (while collecting accelerometer data) and have it survive?

[crake]

Yes, a 9 story drop :)

[ironbears]

turns out that the wirless systems dont work when battery is lower than 30%