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Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Thu Sep 12, 2013 8:52 am
by omwdunkley
tobias wrote:Hmm, that is strange that the new regulator didn't work.
What sets the output voltage is the feedback programmed voltage since these are adjustable regulators. You can check that the feedback voltage is healthy by measuring it, which is pin 5. Be careful not to short against any of the other pins as you have to do this while the board is powered. The voltage on the feedback pin should be close to 1.22V.

Im only getting 0.8V there...

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Thu Sep 19, 2013 2:57 pm
by SuperRoach
Sorry I forgot to reply - I'm getting .84v , And that's with the usb or battery powered.
I'm betting I could have possibly damaged the regulator while putting it on though, because I took so long to do it (and reapply solder :P )

I have a spare vreg to try it with now, but won't have time for a little bit - going to show it off at least partially working at software freedom day on the weekend.

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Mon Sep 23, 2013 7:23 am
by tobias
Hopefully I will receive the pololu 5V step-up today and should be able to do some test.

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Mon Sep 30, 2013 8:50 pm
by omwdunkley
tobias wrote:Hopefully I will receive the pololu 5V step-up today and should be able to do some test.
Awesome! Hope this leads to something!

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Tue Oct 01, 2013 1:22 pm
by tobias
I have been trying to replicate the problem for a while now but no luck. I don't know what that means but maybe it is a good idea if you could send me your broken Crazyflie omwdunkley?

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Tue Oct 01, 2013 1:26 pm
by omwdunkley
tobias wrote:I have been trying to replicate the problem for a while now but no luck. I don't know what that means but maybe it is a good idea if you could send me your broken Crazyflie omwdunkley?
Sure! Pm me your address and ill have it in the mail this week. If you want I can also send along the step up and 2.4 tx.

Cheers!

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Wed Nov 06, 2013 12:43 pm
by SuperRoach
Missed those last few posts, but if you had time to look at it, how did you go looking at omwdunkley's?

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Thu Nov 07, 2013 10:26 am
by tobias
It was most likely due to that omwdunkley had installed a mechanical switch between the CF and the 5v step-up causing voltage transients during on/off. After replacing the digital VREG and removing the switch everything worked fine here at least. Omwdunkley might have some more news.

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Thu Nov 07, 2013 7:12 pm
by omwdunkley
Hey guys,
Ill post more info when I have it ;) My recent focus has been on trying to implement some visual odometry stuff :) Not flown a flie recently ;)

Re: VCC gives 1.8v (was Battery doesn't appear to charge)

Posted: Sun Feb 16, 2014 2:02 pm
by SuperRoach
Hi all, been a while :) Take it omw has his sorted out.

From the irc channel (which is nice, you should all pop by there! #crazyflie on irc.freenode.net ) , Had a suggestion to make it easier for me to try putting a working regulator on it.

In short, along with all the third arms etc to hold the crazy flie in place, to use a tiny blob of glue to hold it in place. The glue would be in the middle, to connect pcb to hold the regulator down.

In short, just trying to think of ways to make it less painful and likely error prone for myself, due to the tiny scale when trying to put that part back on.