homemade motor RPM meter

Hello friends
i am rakesh Goswami
friends aaj ke es video me mane ek RPM meter banaker dikhaya ha jo aap kevel Rs 20 me bana sakte ha or es banane ke liya kvel ek android phone or ek ir sensor or ek ir receiver ki jarurat pdegi
Aap complete video ko dekhker badi asani se bana sakte ha

#Homemade
#machine
#Motor
#RPM
#meter
#counting
#meter
#diy
#new
# mobile phone
#hack

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