How to make obstacle avoiding robot car with out microcontroller

It is simple robo car made with IR proximity sensor.




If IR sensor send signal to relay module then relay on and left motor stop ,robot turn left

Right motor connected to battery + & - so right motor always on




Parts list-

Bo gear motor 100 Rpm

IR proximity module

single channel relay module

plastic box

jumper wire

3 X AAA battery or 

4X rechargeable AAA battery

or LI -po battery 3.7V

wheel x2

castor wheel x1



please watch making video








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