Complete Assembly And Review Of A DIY Robot Smart Car Chassis Kit For Arduino or Raspberry Pi

Bmonster Laboratory here today we're going to 
review the diy robot smart car chassis kit with   speed encoder two wheels and a battery box i 
purchased this on amazon for 17.59 currently   as of December 2021 and it is compatible with 
your Arduino and your raspberry pi which is the   purpose of buying this i will make all builds on 
this temporary at least for now so that i can use   reuse this chassis in the future for future videos 
so let's take a look at what we get in the box   let's put it together and then make a couple 
comments about what we think about the product   let's get started right off the bat when you open 
the box you see these two large tires they have   rubber around the tire and then the plastic in the 
middle is pretty solid these are large tires about   two and a half inches in diameter which makes that 
pretty nice so we got our two tires and then here   this black thing here in this plastic sleeve it's 
a phone holder for some reason they give you that   now here's the bag of components that we will 
take a look at here's dc motor number one with   an enclosed gearbox this feels like a really 
sturdy swivel wheel here's motor number two   and some wire that you will need to solder 
to the motors and a bag of nuts and bolts   and encoders and supports for the motors and a 
battery pack that holds four double-a batteries   and they include some instructions which honestly 
aren't that great but that's just my opinion   and then the chassis body which i really do like 
it's sturdy it's got a clean look to it it's got   a lot of different holes where you can fasten 
components don't forget to peel the paper off   unless you want a brown chassis that you can't see 
through with a bunch of writing all over one side   of it to remove the motor you just take the rubber 
piece off here pull it out there's a look at the   gear that's attached to the motor and the gearbox 
don't forget to remove your motor before soldering   wires to it otherwise you're going to melt that 
rubber piece that holds the gear into the gearbox   we have successfully removed all the paper 
from our acrylic it's nice clear and clean   and another reason i like this is because 
you can hot glue just about anything to it   and removal is nice and clean and easy as well now 
you may hear the fan in the background but it is   time to solder those wires onto the motor i'm just 
tending the wires right now so that it's easier to   attach to the contacts on the motor i'm using a 
0.8 millimeter 63-37 tin lead rosin core solder   some people don't like to use the lead but it 
is easier to work with than the lead-free solder   now if you're having a hard time getting your 
solder to evenly disperse over the contact you   can use what i have is a liquid rosin or you 
can use a rosin paste both are perfect for this slip your motor back into the gearbox 
here and then reattach your rubber   tie down here to keep it connected to the gearbox now i use red 24 gauge wire 
for positive and black 24 gauge   wire from negative the positive and negative 
connection on one motor should be the exact   opposite the connection on the other 
motor if you want the thing to go forward these black things here are 
rotating encoder disc for your   uh your motor i've don't have any plans on using 
it but i'll go ahead and include that in the build   now it's time to install your supports that hold 
your motor under the chassis here and as you can   see it's supposed to fit snugly just like that i 
believe that these are supposed to be identical   but this one does not fit in the same hole as 
the other one so that's not going to work we'll   just have to use this as the outside support for 
the motor now it's time to mount the motor to the   bottom of the chassis using the two supports on 
the side you're going to drive the long screw   all the way through and then put the nut on the 
other side and tighten it up with a screwdriver then we'll do the same thing with the second screw   put that through there's total of two screws 
to go through and you tighten that up as well then we'll do exact same thing with motor number 
two here we'll mount that and i'll use a pair of   pliers to hold the nut because i can't fit my 
fingers down there and we'll just tighten it up   that way i have to get it pretty tight because 
there's a lot of slop is what they call it a   lot of movement between the motors once i mount 
them i've tightened it pretty tight and i don't   want to go any tighter than that so i guess 
it's just something we'll have to live with   i'm not sure why there's so much movement but i 
think it'll be all right for what we want to do   and then finally well sorry it's a little bit 
dark here but you want to mount your swivel   wheel don't forget that now for the switch i'm 
just going to take 24 gauge wire and wrap it   around the contacts at the bottom of the switch 
there just like you see you see some people   put it in just like that upside down with the 
contact sticking up but i'm going to put it in   so that i just have to reach down and press 
the button instead of flipping it upside down   i'll just put it in this way i do use a 
cheap mini glue gun hot glue gun and i will   apply some glue just on the side just 
a little bit just keep it in place   so it doesn't pop out this will keep the button 
in place and if i ever need to move it i can   just easily pull the glue off no problem i'll 
be using a mini breadboard which i can stick   i can peel and stick it to the acrylic but i 
don't want to do that so i'm just going to add   a small spot of hot glue on either side of it 
to keep it in place you want to make sure you   have enough room for whatever development board 
you're using i'm using an uno and it's perfect   since there are no holes directly beneath my uno 
i'm just using brass standoffs to kind of hold   it in place as the robot car is in motion the 
screws they provide don't work very well with   this battery pack it sticks up above the surface 
and scrapes and presses against the batteries so   here i'm using my own countersunk screws with a 
nut attached to the bottom of it now it's time   to attach the tires and you just press them on 
pretty simple now to make the connections i use   three columns on the mini breadboard and the 
first column there on the left i have a white   wire from the switch at the bottom right above 
that i have a negative wire from the battery pack   in the second column i have the second white cable 
from the switch and above that i have the two   negative wires from each motor in the third column 
i have the positive wire from the battery pack and   above that i have both of the positive wires from 
each motor if you want to do it this way you may   want to shift all the wires over closer to one 
side so that they're not in the way of the switch overall i'm pretty happy with this product it 
is durable i love the tires and i like the clear   clean look of the acrylic and the fact that i 
can put hot glue on it to hold stuff in place   and it easily comes off i also like the motors 
and the fact that they come with a an attachment   to keep the motor in the gearbox the gearbox is a 
big plus too you don't have to use your own gears   and the swivel wheel on the front is very durable 
but after a lot of use you might see some of the   screws pop out so they'll need to re-tighten or 
replaced the two things i absolutely dislike about   this product is that the none of the holes match 
up with any of the development boards that i have   therefore i put those standoffs in to hold 
my uno in place and secondly the motors are   kind of sloppy underneath there should be a 
little firmness to them i've tightened them   pretty tight i don't want to go any tighter i 
don't want to crack the acrylic but those are   the only two things so far it's holding up all 
right so we'll see time will tell thank you all   very much for watching don't forget to give 
us a thumbs up and subscribe to the channel   be sure to check out our next video where we use 
this chassis for our complete robot car build

As found on YouTube