Introduction: Automatic Night Light

Picture of 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

Picture of Step 1 PART

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

ITEM

2n3904 transistor

10k resistor

LDR

White led

Wire

Soldering iron

Step 2: Step 2 the Circuit

Picture of Step 2 the Circuit

Step 3: Step 3 Testing

Picture of 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

Comments

scrubbie2016 (author)2016-09-17

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?

FurquanF (author)scrubbie20162016-09-17

Use this transistor bc547 bc598 bc599 2n2222 bc107

scrubbie2016 (author)FurquanF2016-09-18

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?

FurquanF (author)scrubbie20162016-09-19

I don't no

FurquanF (author)scrubbie20162016-09-17

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

scrubbie2016 (author)FurquanF2016-09-18

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

neons8 (author)2016-09-18

thank you

DIY Hacks and How Tos (author)2016-09-17

This project would make a great introductory lesson into circuits.

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