Hi everyone I am using an Arduino UNO stacked with a motor driver shield l239D to run 2 DC motors and 3 infrared sensors. I have 11V powering the shield and that is enough to Run the two motors and two sensors.
But i wanted three sensors so I connected 6AA batteries to the Arduino Uno DC barel. With the DC barel the sensors light up but once I remove the PWR jumper and connect the 11 V to the shield the car doesnt move. The sensors work but the motors not and even with only two sensors the car doesnt move.
Once I place the PWR jumper in its place and disconnect the Arduinoo Uno power the motors move again with two sensors.
Basically the 6AA doesnt let my car work and it should do the opposite.
When I have the two power supplys connected I removed the PWR jumper and it doesnt work.
Does anyone knows why this happens?
Thanks in advance.
My batteries are 3x18650 3.7V 3400mAh and they are new.
My infrared sensors are flying-fish FC 51, sorry i dont have a datasheet. But each One of them draws 2.86V and the motors 3.5~4V
Sorry but I only have a handmade circuit, i didnt put the Arduino Uno nor the 6AA connected to the barel jack. Here goes a picture of my car and the circuit:
Album — Postimages(sorry but there were tio much images to sent One by One).
There is also the original scheme (the One with Four motors) that is the original mine is modified i only sent that for better understanding.
If there is anything you dont understand tell me. Thanks
Noslen_noami:
My batteries are 3x18650 3.7V 3400mAh and they are new.
My infrared sensors are flying-fish FC 51, sorry i dont have a datasheet. But each One of them draws 2.86V
The important thing is how much current is drawn by the sensor. Where did you buy the sensor - maybe the supplier's website has useful data?
Sorry but I only have a handmade circuit, i didnt put the Arduino Uno nor the 6AA connected to the barel jack. Here goes a picture of my car and the circuit:
Album — Postimages(sorry but there were tio much images to sent One by One).
We only need one image for the circuit diagram and please make it visible here. See this Simple Image Posting Guide
Noslen_noami:
Perhaps since the batteries are new I have to Change them? Could it be it?
Why didn't you charge them and see if it makes a difference before asking that question? Charge them now and when they are charged try your project again.
In Reply #1 I asked you to post your program, you have not yet done so.
We are also waiting for you to post your circuit diagram.
Get a multimeter and check the power supply and board voltages while you are trying to operate your project. As previously said, you need to make sure the batteries are charged.
Just a quick paste of the image address. Your images are very blurred. Put some more effort in taking them.
Robin2 said:
In Reply #1 I asked you to post your program, you have not yet done so.
You're on the right track, Nolsen, but you appear too impatient. You should put more focus on what you should do yourself, not on what everybody else can do for you.
Please read the post at the start of any forum , entitled "How to use this Forum".
OR http://forum.arduino.cc/index.php/topic,148850.0.html.
Then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Thank you all for your answers and im so sorry about not knowing how to use the forum I apologise for that...
However my question remains because now the robot works with only the 11V the motors and the three sensors light up. However when I disconnect the PWR jumper and connect the 6AA batteries to the Arduino Uno DC Jack the motors dont move only the sensors light up.
I was wondering why is this happening. I heard that using an external power supply connected to the Arduino Uno barel jack was a good idea because you would lose less power...
I think the OP is connecting the AA batteries to the apparatus at a different point from where he connects the 11v battery. However I am not familiar with the shield so I can't figure out the details.
Sorry for being absent this days...
Anyway thank you for your answers but I already removed the 6AA batteries from my project so now i cant show you my circuit diagram... Sorry for not showing earlier but that was the best camera I had at the moment. The car works fine with only the 11V.
Thank you all for helping and sorry if I was very unclear with my problem I am new to this.
I Will read how to use this forum and Will put more effort in my next question.
