Light controlled Robot without using Microcontroller
Difficulty Rating : 1/10 First Self designed Robot Based on LDR based light sensing module Description: This circuit is specially designed to make a Robot that can be controlled using light. Works best with a laser light . LDR or light dependent resistor is a resistor which has high resistance in dark (a few megaohms) and low resistance in light. Using this principle two kind of circuits can be implemented viz. photovore(Light activated) & photophobe(dark activated). The module shown below acts as a photovore.The variable resistor adjusts the intensity of light at which the transistor switches ON. So when light falls on the left ldr, left motor will get activated and when light falls on right ldr right motor will get activated, depending on how you attach the motors. Components: light dependent resistors (LDR)-2 2.7 Vz Zeners (Recommended, but not required) -2 Diodes 1N4004_1N4007 (any)- 2 General purpose transistor(SL 100 or 2N3903)-2 10K pots-2 low rpm DC