This new version of SMARS is reduced to the essential. The chassis has been eliminated to reduce printing time, motion system is an updated version of the pro tracks model, it gives smooth and precise movement.
This model moved the trade off between modularity and flexibility to another level, SMARS V4 lite is Arduino based but can easily mount Raspberry PI 3B/ 4B or a Microbit by adding a simple adapter.

The model is provided with assembly instructions for the core unit, add ons are not documented.

This pack contains the following parts:
SMARS V4 Lite core unit
ultrasonic sensor
claw
connector extensions
line sensor

To build this model, you will need the following material:
SMARS official electronics kit https://www.etsy.com/it/listing/1102659286/official-smars-electronics-kit?ref=shop_home_active_1 (contains all the parts marked with *)
Core unit:
- 2x 150 rpm 6v N20 motors *
https://amzn.to/3BHHpj2
https://s.click.aliexpress.com/e/_9HTmqT

1x Arduino Uno *
https://amzn.to/3mNzdra
http://s.click.aliexpress.com/e/Qc3oVvA
1x Motorshield*
https://amzn.to/3ENrSPT
https://s.click.aliexpress.com/e/_9zh1Az
1x battery connector *
https://amzn.to/3FXDuRI
http://s.click.aliexpress.com/e/jDzqDWY
6x 5x10x4 bearings
http://s.click.aliexpress.com/e/niSpQUu
https://amzn.to/2YWlWT7
12x 5x8x2.5 bearings
 http://s.click.aliexpress.com/e/wX8okBQ
 https://amzn.to/2YWTLj6
2x silicone wristbands
 http://s.click.aliexpress.com/e/c26JJes0
 https://amzn.to/2H2wtSx
1x velcro strip
https://s.click.aliexpress.com/e/_ATZvYn
https://amzn.to/3wtIzNn
Ultrasonic:
- 1x ultrasonic module*

https://amzn.to/3CKmY5k
https://s.click.aliexpress.com/e/_A0GmmD

Claw:
- 1x MG90 Servo
https://amzn.to/3mEq0mb
https://s.click.aliexpress.com/e/_ATft3f

Line sensor:
- 1x KY-032 infrared sensor*
https://s.click.aliexpress.com/e/_AUpgEB
https://amzn.to/3mLnZVg

battery:

lipo https://s.click.aliexpress.com/e/_9zoEBt
https://amzn.to/3k6mhvZ
+
jst cable
https://s.click.aliexpress.com/e/_9zR4tH
https://amzn.to/3BL2c4c

or

rechargeable 9V
https://s.click.aliexpress.com/e/_AMXoiB
https://amzn.to/3bGU3TT

You can find the matrix and other modules on my MMF Profile
https://www.myminifactory.com/users/Tuitxy