ultrasonic obstacle avoider car

In this tutorial, I am making  a custom obstacle avoiding robot 

you can directly print these PCBs from seeedstudio 

Seeed Studio Fusion PCB  service takes care of the entire fabrication process from PCB manufacturing,  parts sourcing, assembly and testing services, so you can be sure that they are getting a quality product. After gauging market interest and verifying a working prototype, Seeed Propagate Service can help you bring the product to market with professional guidance and a strong network of connections.

jumper    https://s.click.aliexpress.com/e/_dSRayV5

n20 motors              http://s.click.aliexpress.com/e/_dUKwfYM

https://amzn.to/3dkLvk7

ultrasonic module  http://s.click.aliexpress.com/e/_d66uQiU

https://amzn.to/2Yl9eMR

n20 motor socket  http://s.click.aliexpress.com/e/_dUJpEXq

https://amzn.to/2V2aqCO

n20 wheels http://s.click.aliexpress.com/e/_dXfpot2

https://amzn.to/2Br2rrG

l293d motor driver http://s.click.aliexpress.com/e/_dVSiYYY

https://amzn.to/2Nekggj

castor wheelhttp://s.click.aliexpress.com/e/_dShodxE

https://amzn.to/3eo9znq

Arduino uno                https://s.click.aliexpress.com/e/_dUb9laZ

https://amzn.to/2V2wFZ2

download the code from here