Make an Simple Motion Sensor Light! (PIR)





Introduction: Make an Simple Motion Sensor Light! (PIR)

Make an Small & Simple Motion Sensing Light with Less Hassle and Less Components.

A Beginner Could Also Make This.

A Simple Understanding of how transistor works and knowledge of Anode and Cathode is only needed so Make it Tension Free!


I Now Accept Custom Jobs too , Therefore if you have a Design in Mind then I could send you the 
PCB Design for $20.<strong> Send me mail at if you need one. </strong>

Step 1: Gather the Parts

One can Buy Everything Used in this Project from Ebay.

While i Get most of the Things from my Local Electronics & Robotics Store so i don't buy from ebay.

Anyways , Here is the List of Parts which are Needed :

1) PIR Motion Sensor. ( Main Part , i am using HC-SR501 )

Note that every PIR Manufacturer might have a Different Pinout. So Please confirm the Pinout of PIR Before Performing this Project. [ My PIR Had Pinout - VCC | Output | Ground || (From Back Left to Right Direction) ]

2) BC547 NPN Transistor

3) (4 Pcs.) White 5mm Leds

4) Small Copper Board

5) 2 Pin Screw Terminal

6) 3 Pin Right Angle Header

Step 2: Circuit

A Simple Circuit , Controlled by two major Things.

1) BC547 Transistor

2) PIR Motion Sensor

This Can be Done on Perfboard too.

Explanation :

When PIR Sensor sense any Human interference or ir Light running @ 38KHz

then it's Output Pin Become from LOW to HIGH which result in 3.3v Supply in Output Pin,So We Would be using that output pin to switch the transistor on and off which will lead to On and off of leds too.

Leds are Connected in Series So that they would consume all 12v Supply once switched and which would not lead to burning.

Note : Only Supply 12v , If Voltage Greater than this than it will lead to burning of leds.

and PIR has an in-built Regulator which will accept 12v.

Step 3: Breadboard Circuit

For Those who want to build it on a Breadboard.

Step 4: Eagle PCB File.

Just Print the Pdf Attached.

and i will be using the Toner Transfer Method.

it would be your choice which method you will choose because end result would be same.

Step 5: Transfer the Artwork

Just Press Hardly with an iron with full High Temperature Dial for 4-5 mins.

After this immediately dip into Water and Gently Rub the paper on pcb with your thumb.

The Artwork must have Attached to Pcb.

Otherwise if traces are broken then try again.

Step 6: Etch It!

Now put the PCB in Ferric Chloride.

You may use HCL+ Hydrogen Perxide too.

Step 7: Drill Holes.

I use my Hand Drill to drill holes.

it was just useless drill bought from ebay for 2$ , Got it's Spring loose after making 15 pcb's

So, I am switching to a motorized drill for my future projects. ;)

Step 8: Solder Screw Terminal

Make sure to drill with 1mm bit for this because they have a kind of broad legs.

Step 9: Solder Right Angle Header

Step 10: Solder Leds.

I Use white because 3v x 4 leds = 12v

which will not burn the leds.

and make sure the Anode and Cathodes of leds.

Step 11: Solder the Transistor

Be sure to face the flat side of transistor towards leds.

Step 12: Solder the PIR

Till now you might have known that why i soldered the right angle header.

it was soldered to position it motion sensing part towards our self.

Step 13: Power It.

Now power it with 12v.

Give the sensor a warm-up time of 10-60 Sec.

And test it.



  • Epilog Challenge 9

    Epilog Challenge 9
  • Sew Warm Contest 2018

    Sew Warm Contest 2018
  • Paper Contest 2018

    Paper Contest 2018

We have a be nice policy.
Please be positive and constructive.


2 Questions


could i power a 12v LED strip in place of the 4 four LEDs



Can you please help me with the circuit diagram,As

I have 3.7V lithium ion battery and i want to glow 4 v led strip.

So which circuit would be good enough so that i can receive full illumination from led strip.

and in some lights there is on function coming , that if there is no motion than the brightness of led light decreases but if suddenly any motion is detected than it illuminates to full its full brightness.

So please let me know ASAP.

Nice Instructable.

thank you

you can but you will need a buck-boost converter at the input of the lithium-ion battery and a way of taking the battery of for charging.

Hi !!

I have a question does this whole project work on any home appliance like light,fan,etc. If we want to make like that type what should i do ??

Awesome project....
Helped a lot...

Dear instructableinstructors,

I really enjoy reading all your posts. I have a question. I have build the strangest 9V solar panel all by myself (18 cells of 0.5V ) and it has no diodes or anything attached yet. How would I be able to actually use this solar panel in combination with pir motion sensors and 10W led lights to create a soft sheen glow on the path leading to the house when you pass the pir sensors. I have the solar panel idle for 3 years now. I have 5 pir sensors and I have ordered 50 of the 1N4007 diodes, rechargable 1.2V batteries, nothing else yet. What would I need to make this work?

The panel is made of the following cells: I managed to not break 18 and put these together inside glass box with mains type wire comming out the back) 100pcs 3.9 - 4W 0.5V solar cells polycrystalline 156x156mm with 2 busbar, 17-17% efficiency.

hi, i think you can first build complete sensor circuit using PIR and bc547 and just put couple of LEDs in series at your output instead of one, then you use your solar power as your supply (find a way to get 2 output terminals into sensor circuit) ,since its 9v youll probally have to not put any resistor in series with LEDs as they are many....but if so, say 10 can put variable to 70ohm

Hi guys , i have a question i am doing my graduation project using arduino and i want to make a ball fall out of an opening with a motor , any ideas? thanks..

great project

can i place your project on my website.

i'm working on a website which is related to electrical projects.

i also mention your name, link and other info.

plz reply

Hello Abhi,

Let me know your Website url.

I Would Love to Visit it.