Introduction: Make an Simple Motion Sensor Relay Board (PIR)

Hi Everybody,

After an Successful Hit & Featured with " Make an Simple Motion Sensor Led Light"

I Started thinking about anything else....

So , I am here with ' Make an Motion Sensor Relay Board! "

It's Just the Same but with a improvement which i got from previous instructable Comments.

In this instructable , you will need a knowledge of Transistor and Relay Coils...

So Everyone is Welcomed to Make this ....

I Hope everyone would Like this Instructable too.

if you like this then, Do Vote this instructable for 'Home Automation Contest' .....

Step 1: Gather the Parts

Many Items are Available on Ebay but Try getting most of the Stuff from Local Electronics Store Because they have comparatively lower prices.

Anyways Let's see the List:

1) PIR ( Main ) ( HC-SR501 )

Always check the Pinout of PIR ,Some Models have different Pinout.

Mine had (( VCC | OUTPUT | GROUND ))

2) 12v Relay 5A ( Often Called as Suger Cube)

3) 10k Resistor

4) Screw Terminal 2 Pcs.

5) 1N4007 Diode

6) BC547

7) Piece of Copper Clad PCB

Step 2: Circuit

So Here is the Schematic...

A Simpler Explanation for Everybody :

Here PIR, When senses Motion ,Outputs - 3.3v - so we would be using this output pin to turn on and off the transistor which is on board. In Return Transistor Will complete the Circuit and Relay will also turn on and off with transistor.

I Hope this can't be more simpler than this lol.....

Remember : Diode is necessary to control voltage spikes from relay .

Step 3: Artwork - Eagle .Brd File

Provided with Both .brd file and ready to print pdf.

Step 4: Toner Transfering, Etching and Drilling

I Forgot to take pictures of these steps but i have shown you 'how to do this' in my Previous Instructable.

Step 5: Solder : Right Angle Header

We would be using a Right Angle Header to Position Motion Sensor Towards us.

Step 6: Solder : 10k Resistor

Solder the 10k Resistor , it is needed for relay to function properly and for transistor to work.

Step 7: Solder : BC547 Transistor

Make Sure you solder the Right Position.

(Flat Side Towards Relay)

Step 8: Solder : 1N4007 Diode

Check the Stripe at one End!

Make sure it's soldered According to the Photo....

Step 9: Solder : Relay

Nothing to say on this :P

Step 10: Solder : Screw Terminals

Solder the Screw Terminals on both ends.

Step 11: Solder : PIR

Keep the PIR Header Parallel to the Header on Board and Solder it .

Step 12: Finished!

So Here we finish and Let's Test it!

Power it with 12v Adapter .(Nothing Higher Than this! Otherwise Relay will get damaged)

Give sensor a Warm-up time for 10-30Sec. and It's Ready.....

Please Vote this for Home Automation Contest :)

Comments

author
jmamonong made it! (author)2016-12-15

Will the light will stay ON until there is no motion detected?

author
jmamonong made it! (author)2016-12-15

where do i power it where do i put the source?? and where do i put the AC or appliances im going to use? sorry im just a beginner.

author
LucianoS39 made it! (author)2016-11-22

Bad circuit, no work..! Where is the voltage? The pir works with 5 volts, 12 would burn it , Pir module is 5 volts

author
Ayush Sharma made it! (author)Ayush Sharma2016-11-23

If you Ever Prototyped with HC-SR501 Modules Then you would have known that these have a OnBoard voltage Regulator which Accepts Inputs ranging From 5v - 12v.

author
arnold4u made it! (author)2016-04-16

Please where will i connect the 12vdc to power the circuit?

author
nicobo made it! (author)2016-04-12

Hi

i am new to this electronic thing, and would just like to know, (really do not want to sound stupid), but here goes ......

i understand the complete circuit, except for where do you connect the 12vdc ? (from what i can see looks like (NC = 12VIN / COM = 12V GDN)

thanks

author
ShinjiN2 made it! (author)2016-04-12

hey guyz

how many time the light stay on with this motion sensor ?

author
jaxboy made it! (author)2016-03-07

Outstanding 'ible! Very clear instructions, pictures and reasons for doing everything you did. You didn't assume that we were engineers (or idiots), as some do. I had bought the PIR board and relay a couple of years ago, but never was very good at interfaces, so they had just sat in a drawer, collecting dust and my disappointment that I couldn't make my project. Now I can, thanks to you.

author
Ayush Sharma made it! (author)Ayush Sharma2016-03-09

Thanks! I like People getting Helped by my Ibles ...

author
fmpo made it! (author)2016-01-05

hi! I am a newbie! correct me if i am not on the right place. Is this light turned on if it detected a motion? (the relay word confused me) thanks!

author
Ayush Sharma made it! (author)Ayush Sharma2016-01-06

Yes, You are Right.

author
hne made it! (author)2015-12-23

Hello,

I tried your very usefull project. I am new on circuit. I have a problem on your circuit.

When
relay triggered coil poles have 12 volt but Com, NC, NO have no power.
Actually when ı connect a strip led to coil poles, it lights or on. What
is my wrong connection.

I will be appreceiate.

Thank you for sharing

author
hne made it! (author)hne2015-12-23

Thank you.

author
Ayush Sharma made it! (author)Ayush Sharma2015-12-23

I Hope this Diagram Helps.

You have to connect COM Pole to AC or DC Voltage according to your load device.

diagram.png
author
ShashiY made it! (author)2015-10-17

bro plz let me know. how to connect this board to ac appliances like bulb aur fan

author
Ayush Sharma made it! (author)Ayush Sharma2015-12-23

I Hope this Diagram Helps.

You have to connect COM Pole to AC or DC Voltage according to your load device.

diagram.png
author
poncos made it! (author)2015-07-05

sorry sir, i'm newbie and i want to ask why you use bc547 and 10k ? is there reason for that? thanks :)

author
Volthaus Electronics Laboratory made it! (author)2015-06-23

I'm just wondering why your schematic does not show the second two screw terminals?

author
Ayush Sharma made it! (author)Ayush Sharma2015-06-24

Because Everybody knows we have to supply power on VCC and GND.

author
doctorlock made it! (author)2015-06-02

you can buy a relay timer board off ebay for a buck! just takes from two to four weeks to get it from china. just got some and going nuts with this type of stuff.

good job anyway, comes out about the same as the online ones but without the adjustable delay to keep things on or off for a specific amount of time.

author
ABHINAV REDDY made it! (author)2015-05-27

Why did you add diode, how to on or off using this module

author
UlyssesL made it! (author)UlyssesL2015-05-28

Its to protect the left side circuitry from voltage spikes. You see coils(inductors) have a property that the voltage across it is proportional to how fast the current through it changes. Now when that coil is energized(has current) and suddenly the transistor switch turns off, the current in the coil will have nowhere to go... meaning it needs to suddenly drop to zero. This will cause a high voltage to appear across the coil which in turn might damage the circuitry on the left side of the drawing.

author
ABHINAV REDDY made it! (author)ABHINAV REDDY2015-05-28

Thanks but when will the relay switch on

author
UlyssesL made it! (author)UlyssesL2015-06-01

I havent tried it actually but in Step 2, under A Simpler Explanation for Everybody :the author said, when there is movement, the PIR outputs 3.3v which will turn ON Q1, and energize the coil turning ON the relay. hope it helps

author
klubonja made it! (author)2015-05-30

Great job

author
samuel123abc made it! (author)2015-05-27

Great job, tanks for sharing!

author
ABHINAV REDDY made it! (author)ABHINAV REDDY2015-05-27

How to activate this module

author
diy_bloke made it! (author)2015-05-26

nice. but can i suggest a female header so you can just push in the PIR, and remove it again if necessaty.

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Bio: Just a Small Tinkerer ;)
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