i have a 4A 3s(11.1v) 30c lipo battery will it blow up my arduino? cus i heard arduino can handle only 2A and my lipo is high discharge 4A? and can i use the balance plugs to draw power out too? if yes how much Amps does balance plug give?
Hi Adiya,
The maximum current output of you battery do not impact the Arduino board. In fact the Arduino board will draw what it has to draw and if your battery can handle more it will just never reach the maximum discharge rate.
Note that you need to confirm your board maximum Voltage input if you want to power it at around 12V (3s LiPo).
You also want to make sure you do not discharge your LiPo under the minimum voltage recommended unless you will waste the battery. (around 3V per cell)
There are no rating for the balance plug current but it can handle 2A for sure. If you have a 4000mAh battery you can charge it at 4A so it can handle your 2A discharge as well.
Hi thank you for the reply but now i am having a problem:
what i did :
an ultrasonic sensor robot:
12v motor driver shield for arduino with a 11.1v(3s) 2200mAh lipo
the robot works super speed than earlier.
setup:
2pcs. 60 rpm dc hobby motors / 1 Ultrasonic sensor / 1 servo for mounting ultrasonic
EVERYTHING WORKS SUPER SPEED BUT I NOTICED THE ARDUINO UNO r3 is getting really HOT! in one corner near the DC barrel jack tho the arduino gets power from the shield
This is probably the regulator for 5V on the Arduino board.
As previously said, you need to confirm with the board that it can take the voltage you are trying to power it with. If you have an OEM board it can take between 7-12V and your LiPo fully charged will output 12.6V (4.2V * 3) which is a bit above the maximum.
yes i have a OEM arduino, so should i use voltage regulator or some thing you can point me to?
i also have a 7.4v(2s) 2200mAh battery but it has not been used for 1 yr. and its sitting in storage charge. Will using this be safe?
The higher the voltage (even within the specification) the higher the temperature will be on the regulator chip as it has to work harder to lower the voltage to 5V.
Using a 2s LiPo will sure be better for such application.
When using LiPo batteries, make sure not to over-discharge it as you can permanently damage it. (around 3V per cell minimum)