I'm fairly new to the Arduino world, but have a history of good working knowledge of computers and software (I'm a software engineer), but I've only had the opportunity so far to create a few simple successful play-around projects.
I've decided to embark on a fairly ambitious project to build my son a ride on battery powered car for Christmas and trying to put all the pieces together.
An integral part of this plan is to develop what I call a couple of 'Power cells', which is simply a battery enclosure that has:
- An input from the Arduino to control the motor speed/voltage.
- An input from either the Arduino or forward reverse switch to control the direction of polarity (make motor spin forwards or backwards)
- Has a output to power the motor: 20V, drawing about 1-1.5 Amps
- Has a output to power the 9x 12V LED lights on it, about upto 50W total (the LED lights will be controlled by the Arduino outside of the power bank, seeing there are a few of them).
I've drawn up a schematic that works with the components I've bought to help put the system together and was wondering if I am missing anything, critical or not?
Info about the battery I'm using can be found here: Aldi Xfinity 20V Li-Ion Battery teardown.
- Are there any errors with the cabling, I'm assuming no additional earth is required in a DC Circuit.
- What size cables will i need to adequately service my power requirements?
- Would I be able to control the reverse polarity switch directly from the Arduino? As I would like to also trigger a beeper when it is switched in reverse mode. Keep in mind the arduino would need to control 2-4 power cells.
- I assume the controlling the potentiometer from the arduino I would need to use junction boxes between the arduino and the power cells to distribute the signal across each power cell, would this be the best way to do this?
- The Li-Ion Battery also seems to have T output pin, i assume this is temperature monitoring, is there a way to utilize this input into the arduino for safety monitoring?
- I was thinking of splitting the lighting power load between 2 power banks, would this be recommended / possible? (left power cell would power left side leds and right power bank would power right cell leds, with the exception of them both powering the center led).
- Are there any additional safety precautions I should be following, especially working with a Li-Ion battery, ie. Fuse etc ?
I'm planning to make 2x of these Power cells to put in the car (each powers its own motor) (with the ability to add another 2 down the track).
Would really appreciate your feedback (please let me know if this is not the right place to ask this sort of question).