Introduction: Cockroach Control System (via Psychological Manipulation)

Picture of Cockroach Control System (via Psychological Manipulation)
Allows a microcomputer (e.g. basic stamp) to autonomously control a cockroach's direction of movement. You could also make a remote control system. The basic stamp sends TTL signals to a uLN2803 chip which amplifies the current enough to contract a nitinol (shape memory alloy) strand. The contracting nitinol strand flips open one of two flaps which hang on either side of the cockroach's antennae. This creates an illusion for the cockroach of
--"wall left, open right", and
--"wall right, open left"
which in turn controls the cockroaches movement (it's not going to move left if it feels a 'wall' on the left.

I recently realized that probably a better way of controlling the cockroaches movements is by just putting one LED on each side of its head, since they run away from light. Just turn both on to make it go forward, and one on to make it turn left or right. LEDs would require a lot less power and mechanical complexity. I'm going to try it out.

Cockroach backpack paradigm being tested, cockroach responded as desired to the backpack commands

Cockroach backpack being tested, nitinol constriction moves antenna flap.

Step 1: Making the Backpack

Picture of Making the Backpack

When I put together the backpack, it was my first electronic project ever, so it ended up being excessively heavy. I used a camera flash battery to supply the pulse of current needed to contract the nitinol, but you would want to use a capacitor and a smaller battery to reduce weight. I used periplaneta americana which is strong and moves a lot. I also tried giant madagascar hissing cockroaches but they just sleep all the time and are very slow. You should buy these from animal supply places, otherwise you'll have to wait a long time for the roaches in your kitchen to get big enough (about 1.5 inches).

I used really crappy materials that I had on hand to make the backpack, it could be built a lot better with different materials. Apparently nitinol can be soldered, which I didn't know at the time, so I crimped the nitinol at its ends (pretty friggen annoying).

If you reduce the weight enough you could make it remote controlled (instead of controlled by preprogrammed commands from the basic stamp). See the remote control diagram. You could also add sensors and make the basic stamp use the sensors to control the roach.

Step 2: Making the Backpack Circuit

Picture of Making the Backpack Circuit

I made my backpack like shown below, but you should use smaller batteries anc capacitors to power the contraction of the nitinol.

You can make the backpack remote controlled (see diagram with RF receiver).

You can make the basic stamp issue preprogrammed commands (see diagram without RF receiver)

Or you can make the basic stamp use sensors to make autonomous decisions (no diagram for that).

To reduce weight, I used cardboard and taped the electronic components to it. I wire wrapped the pins of the electronics to each other.

Step 3: Attaching the Backpack

Picture of Attaching the Backpack

you'll need to knock out the cockroach. I had a CO2 gas outlet at school, so I hooked a hose up to it and stuck the hose into the cockroaches box. When you hear it stop running around, it's asleep.

Gently slide it out of its box onto a 'gas stage' (don't know what these are called but look at the photo). This gas stage emits CO2 so the cockroach stays asleep.

Carefully clip off the wings to avoid cutting the exoskeleton. Cut far away from the attachment point and work your way closer so as not to damage anything else.

Put a small drop of super glue onto your backpack and attach it on the second segment (see picture) of the cockroach. DO NOT use too much glue or you will glue the segments together.

Turn off the gas and let the cockroach wake up. Make sure it's in an arena or it might run off with your backpack.

To remove the backpack, knock the cockroach out again, put a tiny bit of solvent (like acetone) on the tip of something and dab it around the edges of the backpack. It will come loose.

Let the cockroack wake up and return it to its cage. See my instructable on how to care for cockroaches:


Jsoa (author)2017-09-03

I've read a few pest control sites' roach pages like this one

in the past, and some
mentioned roaches biting people. I thought to myself "What a stupid
idea. Every roach site says that that roaches do not bite". Just a
minute ago, though, I think I experienced what one would call a roach
"bite" from an adult male Blaberus discoidalis. When I handle
them, they're usually very jittery and flutter off of my hand, which is
really entertaining -the distances they can cover are sometimes beyond
what I expect, and I have to go on a little roach hunt to get them back.
Anyway, I was handling him and he seemed pretty calm and suddenly, to
my surprise, he gave my hand a firm nibble with his mandibles. It scared
me a lot more than I thought it would, and I almost flung him off. I
think he was trying to eat me as my Pycnoscelus surinamensis
often do, but when they do it, it's much more gentle, and they continue
to chew for a while before giving up. This discoid, though, gave me a
pretty big jump. Interesting behavior; I wonder if they ever use this
for self defense?

Has anyone else experienced something like this?

Rebreg (author)2012-06-13

Cockroaches are funner to step on than waste time with

yaly (author)2012-02-27

cool but ewwwwwwwwwwwwww gross :P

Icepick (author)2007-03-19

Cruelty,simply cruelty. :-( how would you like it if someone controlled you?HUH!

leevonk (author)Icepick2007-04-03

if you watch tv you are being controlled too

Sovereignty (author)leevonk2011-12-10

I don't care how old this reply is; it rocks.

sjs229 (author)Icepick2009-03-04

but we are not nicking on anyone's stuff like thieves

SnuffyDaPenguin (author)Icepick2007-07-16

You've never been to my house... We have so many roaches, you would hate them too... I ended up burning them, (flamethrower ftw!!) crushing, smearing, flipping them on their backs and backing them over with my mom's van, one accidentally got into the dishwasher one time while my mom was in the kitchen...she locked it in and turned the dishwasher on... We never saw that roach again.

hubo576 (author)2011-06-09

Cockroaches aren’t so hard to control. You simply need to familiar with the symptoms that you have a roach swarm, and next you have to find out where their shell is. Then you must discover a way to acquire at the case to take care of it. Oh, and you have to know how to do those action methods for the highest optimistic result.

Chanio (author)2010-09-27

I once thought of spraying some perfume over a rat collony to cause a civil war. Since they are very aggresive if they are not able to recognize their neighbour's odor...
I fancy these projects. Most of todays best inventions were product of crazy ideas like this one!

critterfluffy (author)2010-04-24

I know this thread has been dead for a while but I felt like commenting on those who said this was cruel and those who might. 

I acknowlege that this isn't how a cockroach might normally spend its day but it is by no means cruel.  The author has taken the time to prevent damage to the cockroach that might prevent it from surviving if freed.  He also provides an easy means of taking the backpack off without causing harm.  As for the CO2 used to "anesthetize" the cockroach, this does no harm.  In fact, most roaches can live for close to an hour without any air at all.

As for the actual device that is being used.  It is no more "controlling" the cockroach then the lines on the highway control you when you drive.  They guide you and this works to guide the roach by using it's natural navigation mechanism in non-invasive/reversible way.  The roach maintains any free will it might have had and it doesn't have to follow the path set for it.  It follows it because that is what it is programmed to find comfortable.

It is important to ensure everyone and everything is treated kindly and fairly but knee jerk reactions have no value and have held back progress for centuries.  People died terrible deaths because people didn't see value in experimentation.  Sure, this and other experiments have no immediate applications but think of what could be done if it is perfected.  Educate yourself on things you don't understand before expressing an opinion and accept your opinion is likely flawed if you don't.  Today, with the internet, there is no excuse for being ignorant of facts and just because you disagree with fact doesn't make it less of a fact.  Prove it wrong if you are so sure it is.

I thank you for allowing my rant and I am done now.

hruodger (author)2010-04-05

I would like to see my cats driving my car!!! lol

radiorental (author)2006-03-17

similar to this:

(o; cool project.. even if it creeps me out a little

Thermionic (author)radiorental2007-01-21

Cruel? No no, this is bad ass. people who feel sympothy for cockroaches clearly have never lived with them.

sarveshk (author)Thermionic2009-12-26

Absolutely !

Berserk87 (author)2009-08-03

the awesomeness of this guide blow my mind.

snipir (author)2009-08-02

aha now thats an interesting concept xD

evilgenius 398 (author)2008-08-29

you have way too much time on you hands

leevonk (author)evilgenius 3982008-08-29

Everyone has the same amount of time. Some, like you, waste it sleeping while others, like me, do more interesting things.

Derin (author)leevonk2009-06-17

I don't have my own time.I borrow it.

bowmaster (author)Derin2009-07-26

I steal it. Then spend it pinning stuff to other stuff with shuriken.

Derin (author)bowmaster2009-07-27


bowmaster (author)Derin2009-07-27

It's fun. You should try it.

thatonekid (author)leevonk2009-06-03

i like your thinking

Spazzapan (author)2006-03-18

This is disgusting and cruel.

thatonekid (author)Spazzapan2009-06-03

you are are stupid simply stupid, not the kid who made the instructable, that's ingenious

klee27x (author)Spazzapan2006-05-12

Horses get to like people cuz we give them carrots. I agree this is a bit cruel, but can't say it really bothers me. :)

leevonk (author)Spazzapan2006-03-18

Is riding on a horse cruel? That's exactly what this is, but with a robot instead of you sitting on it.

thecookiemonster (author)2009-05-27

i agree with icepick, you guys are lousy!!!

NetReaper (author)2008-12-13

How did i get to this by searching for signal amplifier?

SnuffyDaPenguin (author)2007-07-16

Very nice instructable, I gotta do this at my house! I could attach other things to it, so as to get rid of the rest of the roaches in my house at the same time! Muahuahahahahahahahaha!!

add a tiny poison bomb and a camera then let the roach go back to the group and boom no more roaches>:)

evilgenius 398 (author)2008-09-03

you should make one for a hamster or cat or something cause my mom hates cockroaches

Grey_Wolfe (author)2008-08-29

Radio controlled insects. How interesting.

McMoogie (author)2008-05-16


Alexizupinhea (author)McMoogie2008-08-28

LOL... thats how I felt when I first discovered it

all_thumbs (author)2007-04-20

Reminds me of a fascinating scientific (well) article I have read. The author had figured out how to build miniature, indoor airplanes powered by flies. That's right. He attached a fly to each plane, and let them flap their wings, propelling the plane. One of the cheapest forms of motorized, heavier than air flight possible, I would say. Very funny, too.

ItsTheHobbs (author)all_thumbs2008-06-22

My great grandpa showed me how to do that once. I want to try, but flies are kinda small...

Gamernotnerd (author)2008-03-31

Well now we need to make a "Super size" ray and make them huge. Then ride them into the sunset... Yahhh! cockroach

bob555 (author)2007-07-03

time to take over the world atach a small firebomb a becon for a smart bomb the posiblitys are end less and if u start a nucler war the roaches will survive

sockeye101 (author)bob5552008-03-29

sure the roaches would live but the controllers would be incinerated

brandon borick (author)bob5552008-03-17

you have been watching the history channel weird weapons but they used bats

georgedotcom (author)2008-03-10

So, how much battery can the roach carry? Do you have a wireless link, or is it dragging a pound of wire behind it? Between the nitinol and the wireless link, you will be consuming a lot of power, so you had better have a high-energy battery, such as lithium. Of course those batteries can catch fire under the right conditions, so you may have a self destruct mechanism too...

ledzep567 (author)2007-12-13

hahaha this is crazy!!! you must have a lot of time on your hands haha and why would this be cruel???????? rejecting cockroaches and forcing them to hide all the time because they are terrified of the bottom of your shoe, if anything is cruel cockroach racing!

stratholm (author)ledzep5672008-02-21

If I had enough time on my hands could I make a roach army to take over the world? Other than that, I have no use for roaches that listen to me.

Gene Hacker (author)2007-07-21

Magnetic actuators take a lot less power than nitionol.

Gene Hacker (author)2007-07-21

Very interesting Instructable. It is just like the spy roach in the movie "The Fifth Element." Why not use magnetic actuators instead of nitionol? Or just hack a micro rc car into a roach control system.

Peanuts (author)2007-03-21

I think "sensory manipulation" is a more suitable title for this. The current one implies that cockroaches have psyches, which is not scientifically correct. Otherwise, it's a very cool project, one I'd be inclined to try.

leevonk (author)Peanuts2007-04-03

yeah, I guess you're right

robot (author)2006-12-08

BUJAKASHA! any news about this project?

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