LDR problem

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1

Hey i plan to make a robot that has no brains at all. but the LDR's are not working! they were working in the previous appliance (outdoor light) but not now with a battery,motor and an LDR and it won't work! here is the schematic for my robot.

 

My_robot_schmatic_-_Copy.jpg

                                                                    Can you please tell me what is wrong!</p>
2

Is your schematic simplified?

I’m not sure what photoresistor you’re using, but you can’t allow too much current to flow through them. They don’t dissipate a lot of heat (the photoresitor I use is rated at 80mW - datasheet). 80mW @ 5V is only 16mA. They also derate significantly when they heat up.

A better way to set this up is to use the LDR to swtich a power transistor (maybe a TIP 120).

3

Thanks
Cool thank you alot

4

conection
how would i connect it to my robot, sorry im new to electronics

5

Check out this link.
Check out this link.

6

Or this one
My A1 robot does exactly that. With transistors. And video.