Asked — Edited
Resolved Resolved by DJ Sures!

Help On Recovering From A Stupid Moment On The Ezb

I got my head all back together and the neck, etc. I have a battery going through a 640 ohm resistor to a female extention plug. I plug this in to test the LEDs. Each one worked very good but one did not. I checked reverse polarity on the circuit and the LED worked. I did not want to take the head all apart again (hassel). So , I simply turned the plug around not realizing if i were hurting something or not. But, it did not seem that it would damage the EZB because I was simply swapping ground and signal. I can't see very well, I may have plugged a plug in shifting one pin over. that would connect ground to hot or signal to hot.

Anyway, boiling it down, All of my digital pins do not work anymore.

Any ideas? I am thinking voltage regulator blown, I hope it is not the cpu. I am going to run the test that D.J. has and try to figure it out. The lights blink red and blue and it connects up. So , the bluetooth is working.

Wish me luck.


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#9  

I would hope not to be banned.That would break my heart. I LIVE for this forum and the EZB. It is what I do. I am elderly and handicapped. I have trouble communicating because the part of my brain that understands doesn't. I am not trying to get smart. I am just sick. People have to explain things to me very carefully. I just wanted to know the value of the regulator next to the plug. It was that simple. I see a +5v and +3.3v on the ezb about mid section. That is not on the regulator. I am curious about VR1. Simple 5v,12v,3v. the way you worded it was that BOTH of the regulators were 5v regulators and another section had the 3.3v regulator. That is fine, I just need to know.

Anyway, because of my disease I will ask you to give me kind consideration and respect. you are in your prime like I used to be. You may one day have to deal with this. I pray you don't. I have always shown you respect and admiration like my own son.

It was a new question. This is my final warning, but I don't remember ever having been warned before. I thought I had a clean record. I am really trying hard. I post more posts when I am actually using the product then when I am not. Have I posted too many times? Is there a protocol? Thank You, my friend. Hope that you have a nice flight. sorry if I have taken up too much of your time.

;)

#10  

I would measure off of my good EZB to see what all this is. BUT, I have it hot melt-glued down to the bottom of the robot where I cannot get to it easily. I hadn't planned to pull it out so it is really solidly placed. I may damage it if I try to pull it out. That is why I asked for information from some of my friends here on the forum. God Bless;)

PRO
Synthiam
#11  

I already offered that we would help you replace the regulator. I can't have you flooding the forum with questions on the same topic please. It's the one rule that will get temporary banning. Just don't make another thread on this topic and it'll be fine:)

As for your regulator, if you do not get +5 volts on the I/O pins, then the VR is damaged. If you are afraid to swap it yourself, I offered to do it for you. Contact Us and we'll have you ship it to us for repair

#12  

@MovieMaker - The 5 volt regulation that is done on the EZ-B consists of two different devices. The part numbers are: LM1084 IT 5.0 / NOPB
and MIC29300 5.0WT

You can order them from www.Mouser.com.

#13  

Thank you both.

D.J., I am happy that you are not banning me yet. I can change them myself.

@robot-Doc, Is this the same as the 7805 voltage regulator, I have a million of those. I don't know if the are Field-Effect transistors or not. I just know that they are on most pieces of computer equipment I have.

OK, so BOTH regulators are the same? 5volt. That answers my question if you will confirm.

Thanks,

:D

#14  

OK, I sort of understand. I am getting my +5v on all of the digital and analog ports. My bluetooth connects. But, I cannot control the digital ports. I think maybe my cpu is bad.

Please confirm.

Thanks,

Mel

PRO
Canada
#15  

Hello @MovieMaker,

This forum post should help you out. Both Regulators aren't the same on the EZ-Bv3. Something to be aware of is that the LM1084-5.0 while being a similar 5V linear voltage regulator (not a FET) it doesn't have the same pinout as the common 7805 or the other regulator the on the board: MIC29300.

So you are no longer getting 2V on the Digital 5V line, it's back to 5V?

#16  

Thanks @skater_i10 for the correction to my earlier post. That post has been edited to reflect that there are two different part numbers for the two 5 volt regulators on the EZ-B V3 board that are mounted to the two heat sinks.

  1. LM1084 IT 5.0 ( VR1 )
  2. MIC29300 5.0 WT ( VR2 )

Both of those devices can be ordered from www.Mouser.com