laser driver

this is  a schematic fir a simple laser driver which can be easily made at home

this will help you all out in your laser projects

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line following robot

1.the robot uses ldr instead of a ir sensor.

2.the under given schematic will provide with one of the easiest way to make a line following robot -

hope that this shematic will help you all out there 

for now this is geekguru signing out.