LightSeekerBot by Nicholas H

Base: legos
Outputs: two lego motors and two LEDs
Inputs: two CDS cells
Brain: circuit I made
Functions: Light Seeker Bot drives in the direction that most light is coming from.
Power Source: 1 9-Volt battery
Width: 5 inches
Length: 4 inches
Height: 3 inches
Problems: I only had one problem with this robot, and I still havenít fixed it. The problem 
is that the CDS cells I have have different resistances, and they donít work very well because I
left them outside over night. I need to buy new CDS cells. 

Time to build: less than one hour
Cost: Nothing-I had all of the parts already


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