
MovieMaker

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.
@ DJ, what are the voltage regulator values, I know one is 5 volts. Is the other 3.3 volts? I am getting 3.3 where it says 3.3 on the print. And, I am getting 5v where it says 5v. Also, I am showing 7.2v coming in.
The other one has 5v coming in and 2.19 going out. That is the one I think is bad. I need to know the value so I can change it. I have a lot of regulators in stock. This is probably the 3.3 regulator. But, I need to know.
Thank you.
5 volts is the ezb except for the pin labelled 3 volts. You know these answers because the board is labelled
I still don't understand. You are saying you have a 5 volt regulator ie; 7805.
And you have a 3.3 volt regulator?
VR1 is the one that has the problem. But, is it a 3V regulator or a 3.3 volt regulator? I just want to be sure before I purchase it. I have plenty of 5 and 12v regulators.
I see two. I know which one is 5 volts, but I have to be sure the other is 3V. My eyes are bad and I don't see it labeled ,but I will look again.
Thanks, and sorry to bother you on the plane.
The voltage out of both of the heat sync regulators is 5 volts. The voltage out of the small regulator is 3 volts. These voltages are labeled.
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.
God Bless
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
LM1084 IT 5.0 / NOPB
and
MIC29300 5.0WT
You can order them from www.Mouser.com.
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,
Please confirm.
Thanks,
Mel
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?
1) LM1084 IT 5.0 ( VR1 )
2) MIC29300 5.0 WT ( VR2 )
Both of those devices can be ordered from www.Mouser.com
You STILL think it is the regulators even though I have +5v on all the power pins going to the digital and analog ports? and the place where it says 3.3v I have 3.3 volts. And the place it is supposed to be 7.2v , I have that. On the i/o pins, I will have to check for the signal pins and see what voltage are on them.
Thank You soo much.
But, which regulator goes on VR1 and which regulator goes on VR2.
And, If I am getting my 3.3v and 5v and 7.2 in the right places, maybe it is NOT the regulators.
What do you think?
I hate to ask so many questions, but I don DON'T want to burn up the EZB.
Here are my latest readings:
On VR-1 =7.2v going in =5v going out
On VR-2=7.2v going in =5v going out
On digital lines= 5v on power
= 0v on ground
= 2.1v on signal line.
On PC Board the 3.3v = 3.3 volts
It all sounds correct to me. But, (NONE of the I/o works.)
But, the wireless connects as promised.
Thanks,D.J., Skater, and Robodoc. You have all helped me countless number of times.
I would like to hear what RICH has to say.
:-)
Mel
1) LM1084 IT 5.0 ( VR1 )
2) MIC29300 5.0 WT ( VR2 )
You should check with EZ-B support for what might be failing on your V3 EZ-B.
If you are struggling with it I'm sure if you send it to the EZ-Robot's team they will take a look at it and sort it out.
The only thing in addition that I can think to do, and it probably wouldn't help at all but worth a try is to set up 20 test LEDs (one per port) and set up a simple script or add controls to turn the LEDs on and off.
Code:
I have sent an email to the support team.
LEDs flash-I can hook to bluetooth.
All voltages are what they should be.
CPU has zero ability to turn digital and analog ports on and off. They just stay off.
I think it is the cpu.
I have contacted customer support.
Either way, EZ-Robots will sort it out for you
Thank you, Jesus! I am sooo happy. Sorry to have wasted all of you precious people's time. I guess the answer was re-seating the chip.
OK, I went through every port. It works with the servo. But, it won't turn a simple blue LED on and off. I test the little light on the battery connection and it works fine. But, not on the ezb. It is the same type of setup that I have used in several generations of robots. It is amazing. It is blowing my mind.
I have turned in a notice to the staff, but I haven't heard from them.
Thank you,
Mel
*sick*
Totally up to you, however we will not repair the board after someone else has altered it in any way. If you are confident in your abilities, that would be the cheaper way to go.
@mel I mean if you can send it in the the factory I would do that.
When I do a search for the %A LDO POS REG, it puls up the LM1084. Am I missing something? or are they the same chip. It seems like they have a different pinout. I need the part # to the VR2.
Thanks,
Mel