I'm back with some more cool DIY projects.
In this instructable, I'm sharing with you about my new modified
# Modified Automatic night light Circuit
This is one of the Cool Circuits I have made....
I think you people would probably like my project.
As explained earlier this is the modified version of my previous project . But the change is that THE CIRCUIT HAS BECOME MORE POWERFUL & YOU CAN EVEN CONTROL YOUR HOUSE LIGHTS OR STREET LIGHTS ( Or just anything that comes to your mind) by just connecting an appropriate relay.
(In the old circuit this cannot be done because it did not work perfectly with a relay on it )
I had connected everything that I could get my hands on and made them on - off by the swish of my hands ( blocking the light to LDR using my hands).It was so Cool.Somewhat like a motion sensor activated things
Children can use this at their science fair to show off Automatic street light controller based street lights.which turns on automatically at night and switches off automatically when it's morning or whatever idea that strikes in their mind.
Step 1: To the Building Procedure......!
Working of the circuit is as of the previous project that I had published earlier but now its power has doubled.it's more advanced compared to the other which could only control LEDs
Step 2: Gathering Materials......
First Step in a project is planning and gathering materials.
So now let's gather the items to make the project
Electronic components required:
1. 1K resistors - ×2
2. SL100 Transistor - ×1
3. BC107 Transistor - ×1
4. 100K preset - ×1
6. Prototyping PCB board
7. An LED
8. 9v Battery & battery connector
9. 5v relay
1. Soldering Iron
3. Soldering Lead
Step 3: Building.....
Follow the circuit diagram.
First solder the smaller things like resistors , preset and transistors and But it's better to continue as in the circuit diagram.
Step 4: Step - 1
Solder the preset to the PCB.Presets have 3 legs,one middle one and other 2 on sides join anyone and middle leg and follow as in the circuit diagram
Step 5: Step - 2
Solder BC 107 Transistor as in the Circuit.Take note of the pin-outs of the transistor given in figure 2.
Step 6: Step - 3
Solder the 2 Resistors as in the circuit diagram.
Step 7: Step - 4
Now solder the SL100 Transistor as in the circuit diagram.Take note of the pinout of transistor given in figure 2 before soldering.
After this, our building process is almost finished.
Step 8: Step - 5
Now the wiring part.
Leave wires so as to connect the battery,relay and LDR as in the diagram.
Connect the battery connector to the 2 wires coming out to the battery.
Connect the LDR & relay to its respective wires.
Step 9: Testing.... !
Connect the battery and adjust the preset with a plastic screwdriver (using a metal one would affect its tuning). Turn it till the LDR is adjusted to the surrounding light and the moment when bulb switches off leave tuning it . Now try to cover the LDR blocking it from light.
If everything is right LED should light.if not adjust the preset and try again.
Tuning is same as in the previous project.But here we have to insert a screwdriver to turn it,that is the only difference.
Now reconnect the relay and you can use this to replace the switch of your garden light.So that it will light up automatically when night and then turn off automatically when it's morning.
Place the circuit in a box and leave the LDR out so as it is facing the light outside.
Now it is ready to work for you...
Not only this you can do anything with this like,
1. motion activated switch
2. motion activated burglar alarm
3. automatic street light controller
...."Let your imaginations loose and start building anything that comes to your mind" ...
For more about the technical stuff of this project, check out my previous instructable:
A simple circuit for every electronic beginners #Automatic night lamp with LDR - Check out this Instructable.
AUTODESK CIRCUIT VERSION
Press start simulation above and tap on the LDR, you can see a movable slider pointing to the sun and the moon
Move the slider to the moon, you can see that the LED lights
Do the opposite the LED turns off .
To make circuits like this visit circuits.io
And here is the pdf of this project for those who do not have pro membership.