Automatic Night Light


Introduction: Automatic Night Light

hi friends this is my first instructable this circuit is very easy the led on in the dark

Step 1: Step 1 PART

hi friends this is my first instructable led on in the dark


2n3904 transistor

10k resistor


White led


Soldering iron

Step 2: Step 2 the Circuit

Step 3: Step 3 Testing

put your finger on LDR and see the led is on put away your finger from LDR and see led is of

You face any kind of problem plz coment i am solve your problem thank you



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    Love this project! Clearly written and very inviting for my project for which I will appreciate you providing me some extra/adapted info:

    Can you also create schema with the S8050 D331 NPN transistor and 5Vdc power? And what type of LED bead did you use here and mus I use another one, by using 5Vdc (700mA) power?

    5 replies

    Use this transistor bc547 bc598 bc599 2n2222 bc107

    Thank You for your reply!
    Shame that 5V does not work this way ...
    Do I read this correctly, that You mean that thebc547 bc598 bc599 2n2222 bc107 are alternatives for the 2n3904 transistor or can I use them for a extra low voltage application to try out?

    Hi i use 3v button led circuit did not properly work whith 5v dc and you can't use s8050 d331

    Thank You for feedback. You answered also on 08:21, so I have put my response on that .....

    thank you