Introduction: How to Make an Airsoft Mock Heartbeat Sensor

Picture of How to Make an Airsoft Mock Heartbeat Sensor

Have you ever thought that your airsoft gun was missing something? Well why not a heartbeat sensor! It adds the perfect touch of futuristic flare to your airsoft gun you've always wanted! Although this particular one doesnt actually sense heartbeats, it can still amaze your friends and give you something fun to build and use. This heartbeat sensor is from the popular game Call Of Duty Modern Warfare 2. Im sure many of you have seen it.

Step 1: Materials

Picture of Materials

For this project, you will need to get the following:
Empty milk carton
Altoids Tin
Small 1 1/2 by 2 cm metal hinges
3 LED lights (Colors of you choice, i chose 1 white and 2 blue)
Silver permanent marker or sharpie
small insulated wire
on/off switch
Small Energizer A23 battery
Scotch tape (blurry kind, not the clear kind)
Rail mount
2 Magnets
2 small metal plates

(Optional items listed below for add-on)
Small RIS rail (airsoft)
Durable peice of scrap plastic
Small screw
screw (size depends on what airsoft gun you have and if you need this add-on)

Step 2: Making the Body

Picture of Making the Body

First, start out with cutting out the top of the altiods tin with a dremel. Dont cut all the way to the edge of it though. Take the milk carton and cut a rectangle that fits in the top of the tin. Make the Heartbeat sensor design with a silver sharpie on it and place it in the top as shown.

Step 3: Electronics

Picture of Electronics

Here comes the fun part. Drill a hole in one of the sides of the altoids tin big enough to fit your switch. open your altoids container up and fill it with the LED's, wire, battery, and switches shown in the diagram. Make sure positives are on positives and negatives are on negatives. If not, the circuit will not work. Point the LED's upwards. If they are too bright, cover them with the scotch tape to dampen the light.

Step 4: Finishing Touches

Picture of Finishing Touches

Tape over the "screen" on the heartbeat sensor and paint it the color of your choice.  Drill some holes in the side of the altoids tin for the hinge. if your right handed, drill them on the right. if your left handed, drill them on the left. Sew on your hinge and screw the other side of the hinge onto your rail mount. Glue a metal plate onto the altoids tin as shown in the picture and place a magnet on your rail mount where your metal plate will connect to it when swiveled out. Last, take your other magnet and glue it on the front of your altoids tin as shown. this will keep it in place when you close it. You may need to add a metal plate on your gun for it to attatch to when closed.
Note the front magnet on the second picture.

Step 5: Extra Add-on (optional)

Picture of Extra Add-on (optional)

If you have the JG m4 or any other gun without a long side rail, you may want to stick around for this extra add on that will add for a better effect. Take your small RIS rail and your scrap piece of durable plastic and screw them together forming an "L" shape. Drill a hole large enough to fit the size screw you will need to mount it to your gun as shown.

Step 6:

Picture of

You're finished! have fun with your new (mock) heartbeat sensor!


821ja (author)2013-02-22

this actually works?

msan jose (author)2011-05-02

i want to build this but i can't find certain materials. where can you buy stuff like the switch. small led bulbs, the wire and how do you put the wire bulbs and switches together? same with the magnets

coocooachoo568 (author)msan jose2011-05-19

you can buy the wire and most of the supplies at the hardware store. i strip all of my materials from old electronic things, like the switch is from an old rc car and the lights came from little finger ring light things. theres a diagram (on paper) that shows you what to put and where to put it in the instructable. i got the magnets from a name tag thing. u can probably get those at a hardware store too or from anything you can find.

FlyingSoapbox (author)2011-03-24

What Gun is that?

JG m4

The 500 fps one?!

TurbineModz (author)2011-03-09

Haha this was pretty creative, I might make this myself but with a few changes...

Slayerfan666 (author)2011-01-14

I would recommend cutting out the top piece of the altoids tin then painting it before you do anything else, the paint got under the tape on the screen and I had to start again.

i agree

notyou13 (author)2010-10-19

nice job i am definataly going to make one

Simon Ghost Riley (author)2010-09-21

If u go on LED Contest i will vote u.

isnt that over?

Yeah too late.

Simon Ghost Riley (author)2010-09-19

Nice i have Airsoft M4A1 with M203 so i will try to make that. So cool man.

awesome thanks

johnshepperd (author)2010-07-10

WTH did you cut the rail mount off thats a good red dot scope OMW! think about it now its usless! ughhh!

no, that was a 6 dollar red dot sight that came with a walmart gun.

Valoerman117 (author)2010-08-30

Um how do you put it on an m4 and where do you get the magnets

i got the magnets from one of my fathers work name tags he uses. and look at figure 5. the screw goes in a hole near a rail on my M4. but i have the JG m4, i don't know if yours will have that hole or not. so you can try to put it on some other way.

Valoerman117 (author)2010-08-30

Where do you put and get the magnets

i got my magnets from a magnetic name tag my father had for his work

pieman12 (author)2010-02-16

i dont have much money. where can i get a cheap gun that wont break after i shoot it 5 times

stg.badass (author)pieman122010-07-20

airsoft gi hobbytron/airsoft a pistol is cheap although if you really think your into it buy a aeg is you have enough money i have a thomsan 1928 typewriter 465 fps and a jg m4 ris 500fps

coocooachoo568 (author)pieman122010-02-18

The BEST site for ANY gun, is

pieman12 (author)coocooachoo5682010-02-18


zasxcd (author)2010-06-09

LOL OMG if i made this i would make that iron man arclight thingy too lol

cdawg452 (author)2010-04-18

that is totally amazing dude! great Job!

silentassasin21 (author)2010-01-27

Also this can use a bit more discription

Tell what more you'd like to know so i could help you with that. thanks!

Well first of all you just are showing one maybe two pictures per step with next to no telling what were suposed to do. You also need to show more about the wiring.

The wiring isnt that hard at all, all it is is a series circuit with LED's and a battery.

Soksume (author)2010-01-26

hey by just looking at it iff you could get some small button cells to power the led a hard plastic Ipod touch/Iphone case would make it sleeker and thinner ?

coocooachoo568 (author)Soksume2010-01-30

i tried two 3 volt button cells but it didnt work that well. it only held 2 LED's, but i guess you could try. 

silentassasin21 (author)2010-01-27

This would look nice on my mp5 where do you buy the leds wires and the switch. Sorry im so lasy

i took my switch off of an old rc truck. and the leds came off of some crappy flashlights you get out of those 50 cent machines you sometimes see in an arcade. but you can go to the hardware store and get a switch and a spool of wire for like 4 bucks and then the LED's online or the hardware store as well. haha and yes i have an mp5 too. =P

barrax (author)2010-01-25

5* it looks great, and even though i dont own any airsoft guns, im tepmted to build anyway ;)

does it have the ability to fold in?

if it doesn't, dont worry :)

coocooachoo568 (author)barrax2010-01-26

yes it does have the ability to fold in. thats what the magnet on the outside is for and the hinge. =) but if you dont have a metal gun you would have to put a small metal plate on the outside of the gun so the magnet will stick.

barrax (author)coocooachoo5682010-01-27


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More by coocooachoo568:How to Make an Airsoft Mock Heartbeat SensorHow to make an easy, cheap, non-explosive airsoft claymore using household items!
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