Daylight-turn off

[Mike_shams71]

Hi everyone!
I want outdoor LED lights that work off a 5V DC power bank, but they need to automatically turn off when it's daylight. How can I do that?
Thanks for your ideas

 

[AnalogKid]

http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=photoelectric+light+switch&_sop=15

 

[Old Steve]

I'd use an LDR connected to a comparator, with the comparator output switching the LEDs on/off.
(LDR = light-dependent resistor)

 

[Ajay110]

This is a very basic circuit and can be easily built using LDR. You can find so many, search "darkness detector" in Google. Or go though below links:
http://circuitdigest.com/search-page?keys=ldr
http://www.instructables.com/id/quotDark-Detectorquot-using-a-555-timer-IC/

 

[cjdelphi]

I just created this basic circuit, the resistor value that changes is a light diode resistor (ldr) low resistance means high light level, high resistance would mean little light..

The two screenshots show the different states basically swap it for the ldr, if you need more power a darlington pair or maybe swap out for a mosfet