Hey guys,
Just wondering if i powered the arduino with a 9V Lithium Battery (input)
then from the arduino's 5V and ground, connect a 1.5V AA Battery
then from 1.5V AA connect a Servo Motor, would that mean the Servo would be given 6.5V?
I made a image representation to show what i mean better-
Also did i connect the positive and negative wires to the AA battery properly?
Thanks a bunch guys
To add voltages from multiple power sources you'd have to put them in series. But i don't know if it's a good idea to hook up a battery with your arduino.
Transistors are ment to regulate high power circuits with a low power one.
Why don't you put a couple of batteries in series to reach your 6.5 - 7 votls?
cause there is too much current connecting 4 AA batteries (1.5x4 = 6V), i've tried it before and the servo stalls a lot due to the high current.
cause there is too much current connecting 4 AA batteries (1.5x4 = 6V), i've tried it before and the servo stalls a lot due to the high current
I think you've got your explanation the wrong way around - a stalled DC motor draws most current.
What is the behaviour you observed?
I simply suggest you to seprate the servo power from arduino itself. Later on you will find out there are many problems if you connect it that way. Get a shield or something like this with external power plug.
Such as: http://www.dfrobot.com/index.php?route=product/product&path=35_39&product_id=264
I use a 5 AA battery pack hooked up via the barrel jack to my arduino. The arduino auto regulates the power down to 5v. (I'm using a UNO). I run two servos at a time off of mine and it works fine.
You need to look more at your servos though and there specs. If you need more or less power then 5v or 3v3 that the arduino offers then you need to route power a different way to the servos and just use the arduino to send the control signal. Remember that a arduino can only take a max of 12v but it is suggested for best performance to supple it with 7v5. I.e. 5 AA in succession.