black jags not showing a solid yellow light
 

Last night our programers got a base code loded on the crio and they tried to move the moders but the new back jags are not showing any indication lights so I was wondring if they could be burnt out. I think someone might have cross wired the electrical componets and turned on the robot without having the wiring dubble checked any sugestions. Finaly we have tried all the pdm slots on the sidecar

Re: black jags not showing a solid yellow light
 

With power added, but no pwm cable plugged in the jaguars should blink yellow.

If they are not blinking yellow then double check the power input with a multi-meter.

If the input power is ~12v, but they do not blink then they are probably broken.

There is an RMA process available for broken Black Jaguars.

Re: black jags not showing a solid yellow light
 

Ok thanks

Re: black jags not showing a solid yellow light
 

There are some other posts where teams are reporting issues with black jags that are not working. Any possiblity that there is a production issue?

Re: black jags not showing a solid yellow light
 

Extremely unlikely.

Take this as an engineering problem and run some numbers.

5,000 Black Jaguars were shipped to teams in the KOP.
More have been purchased through Digikey.

Production runs do have a standard error rate, probably less than 1%, and quality control would pick up on that.
That would mean ~50 Black Jags that might normally be expected to have problems. That would mean ~ 20-25 teams would normally be protesting that their jags aren't working.

So far we've heard only a very few teams out of 2077 complain.

We've seen nowhere near even the NORMAL number of complaints you'd expect with a less than 1% production error rate.

Luminary Micro published an error report after 2009 based on the number of units returned to them that you can checkout. The vast majority of the failures were due to usage, not out-of-the-box bad Jags. There were a few out-of-the-box bad Jags though, so don't be surprised if perfection isn't achieved.

Re: black jags not showing a solid yellow light
 

No its not a bad jag its probobly fired because I as team captien trusted freshmen and sophmores to put back with back and red with red :) lol

Re: black jags not showing a solid yellow light
 

Will reversing the polarity fry a Jag?

Re: black jags not showing a solid yellow light
 

Yes.

Re: black jags not showing a solid yellow light
 

Well that's a downer...

Re: black jags not showing a solid yellow light
 

That's funny, our electronics this team is all-but-one freshmen and softmores, and last year a class of juniors and seniors wired a test robot and they fried one.

Do all of the black jaguars not work? It's unlikely that every one is wired backwards, so it might be some other issue.

Re: black jags not showing a solid yellow light
 

Yes bolth jags are broken so lession learned don't let frshmen do things without minor suppervsion