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
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