Quick and Dirty Mosquito Trap
Intro: Quick and Dirty Mosquito Trap
STOP. This mosquito trap doesn't work well if at all. It was a fun project, and while I did manage to catch *one* mosquito in it in the couple weeks I ran it, it's far from being worth your time. I'm leaving this instructable up here so others can learn from my mistakes because, well, that's how science and engineering work.
Mosquito season is fast approaching - make a simple trap for cheap. The theory is that the light attracts mosquitos and the fan sucks them into the bag (usually shredding them in the process). This instructable is in experimental phase and will be updated as we go (see the Science step). I release it here as a neat community science project. I hope that folks will take the base idea, add a little twist, and then get back to me with the results. I will feature people's builds and improvements with full credit to the authors so other folks can learn from each other's mistakes and successes.
This build is darn simple on purpose. I get sick of instructables that require fancy tools like laser cutters, 3D printers, and CNC machines. I, myself, was tempted to make this super elegant with a CNC-cut or 3D printed box, but I didn't. Not everyone has the money for or access to fancy tools, and I wanted to respect that. Of course, you can fancify this to your heart's content, but you don't need to.
The only tool you need for this project is a soldering iron, and you can even get around that just twisting wires. A set of wire cutters is recommended as well, but you can accomplish the same thing with a pocket knife or a razor blade and a bit of caution.
Something I mention later but want to stress here as well: This trap will kill bugs (and possibly geckos) other than mosquitos. Think about adding a grating just large enough for mosquitos and ONLY turn this on when you are outside nearby. Use it like you might use a citronella candle: don't use it 24/7 when you don't need it.
I try to keep track of people's comments and respond to them. Before commenting on something, take a look at the "Science and Comment Feedback" step and see if I address your concern/idea ;)
STEP 1: Materials
Solder and heat shrink are recommended, but not required (you can twist and tape around wires if needed, it's just not as sturdy).
STEP 2: Superglue
STEP 3: Solder
Note that red is positive and black is negative. There may also be a third wire on the fan that is usually yellow. You can snip that off and ignore it.
Tape or heat shrink the exposed wires. It is wise to add a bit of stress relief by making a small coil of wire and then fixing it to your mount with a zip tie, glue, or tape. This will keep your wires from getting pulled apart as easily.
STEP 4: Fit the Bag
STEP 5: Mount and Enjoy!
STEP 6: Science and Comment Feedback
A few commenters are questioning whether or not mosquitos are attracted to light and whether or not this trap will work. Great question. Answer? I don't currently know, but I believe it will work. I based this idea around seeing many mosquitos hanging out on the screens of closed windows at night last summer. When it warms up here and the mosquitos are out, I will give this a more extensive try - if it doesn't work well, I will happily brand it as "Failed Quick and Dirty Mosquito Trap" so others may learn from my mistakes. I am a scientist and will turn on a dime if things don't meet a hypothesis.
A few people have suggested IR LEDs in place of the colored ones. As luck would have it, I do have a 12V IR spotlight we can try. My guess, however, is that it will do very little. IR LEDs emit a wavelength that is different than the ones things emit when hot. What would work better is to place a power resistor in front of the fan as a heating element. I will try both in a couple months and post the results :)
That said, you can turn this into a great science project and see what you can do with it. Do different colors attract more or different kinds of bugs? Does it work better if you mount it in a tube so the light only shows out one side? Will a slow stream of CO2 from a paint ball canister make it work better? How about if you stick a piece of worn, sweaty undies by the fan to see if body odor is an attractant? (Kinda gross, but hey, it's for SCIENCE!)
Try things, message me your results with pics, and I'll post them here with full credit to you and links to your Instructables profile.
On of the commentors sent me this: https://www.instructables.com/id/How-to-make-a-1-Mo...
It's a similar concept but with a large box fan. It would be kind of neat if folks combine his idea with mine and threw LEDs and/or a heat source to create a super mosquito trap. It would be interesting to see if it works better or worse :)
STEP 7: Disclaimer and Front Grating
This was not something I had thought about. Where I live in Colorado, the majority of flying insects that hover around lights are mosquitos and some moths (and we definitely don't have geckos).
It may be a very good idea to put a form of "reverse grating" over the front of the trap; something with holes large enough for mosquitos to pass through but small enough to stop larger insects and animals from getting hurt.
Also only turn this trap on when you are on the back porch and actually need it (treat it like a cintronella candle maybe). No sense shredding animals and bugs that can't hurt you while you are indoors.
92 Comments
monkeyracing 9 years ago
Don't get me wrong,. I would love to own some high tech toys - they're incredibly useful - but nothing beats the satisfaction in making something from scratch, on your own, with stuff you have hanging about.
I built a hot wire foam cutting table last week for free! Scrap wood, a piece of found aluminum bar, a bit of nichrome wire someone gave me ages ago...it's awesome!
dmwatkins 9 years ago
curious0001 3 years ago
inventorsmurf 9 years ago
This is a very nice concept, and a GREAT idea, but it will probably not work effectively for a number of reasons. I did a research paper on mosquitoes years ago and the answer to what attracts them is not, regular, light... though the heat from the light will have an effect.
In short, they are attracted to body temp, CO2, movement, and POLARIZED light.
It is the combination of all of the above, with the exception of the light, that allows them to tell a food source from a tree... and the light which reflects off of water is polarized, and thus directs them to a breeding zone.
Likewise, they often travel as far as 1/2 mile for a single meal... so when they were hanging out on the porch screens, they were not there
for the light, but rather were following the CO2 from your breath to
the heat source. Once within 15 feet, or so, they can see you VERY well.
So imagine half starved, miniature wolves, drooling over a rabbit in a
cage... they can see it, smell it, taste it, feel it when it exhales... but they just can't get to it.
Now, if you added a CO2 tank with a small valve to control release, and a non light heat source like a small light bulb painted black... in front of the fan........
Kweek 9 years ago
inventorsmurf 5 years ago
iceng 5 years ago
I made a pusher bug fan trap IT WON'T WORK and here is the reason why !!
A pancake fan, filling a bag trap, has a back blow on the outside perimeter of the fan blades which pushes the insects away before they can reach the center sucking area..
As there are no captured insect pictures, I rest my case !
HLightning11 8 years ago
nice no-fancy-tools thing. although the people in the ad department of the site may dissagree... 3d printer ad while i type lol
HLightning11 8 years ago
cool! but if it shredds bugs, what about a plastic bag or duck tape bag?(bag made of duck tape)
pachytrance 8 years ago
nice
Vulpinemac 9 years ago
I notice several people are asking the same question I'm about to ask, though there is a reason I'm asking.
Brydon points out that mosquitos are not attracted to light, which is true. Rather, aside from the chemical commentary he uses, they are also attracted to heat--or rather Infrared light which is not something you'd find on a computer case fan. Which leads to the question itself as to how effective your gadget is against mosquitos themselves.
You appear to be basing your idea on the fact that the bug zappers so readily available now are relatively effective against mosquitos--as well as other bugs, obviously. The reason isn't the necessarily the light itself, which is an ultraviolet fluorescent tube usually, but rather the heat that the tube puts out. The UV attracts other pest insects that are harmless but annoying when they land on and around people and food outdoors (hey, they have to eat too, you know). But I'll also note that it can attract bats that will be flying through the space to catch some of those insects before they get zapped. That can be frightening to someone who isn't expecting it.
So again, how effective is your lighted bag-fan against mosquitos themselves?
A_Steingrube 9 years ago
If I find it doesn't work well for mosquitos, I will happily rebrand this as "Failed Quick and Dirty Mosquito Trap" so folks can learn from my mistakes. I may also make changes such as a simple heater resistor to make it more effective.
Vulpinemac 9 years ago
srilyk 9 years ago
I have to sadly inform you that mosquito hawks are not. It's the most depressing fact that I've learned - they're actually called crane flies, and they do not eat mosquitoes :(
Bats, OTOH, do. Bats are the best! <3
ineluctable 8 years ago
And sadly bats do not eat many mosquitoes either. It's a bit of a myth. Like bug zappers, bats are much better at eating big juicy moths and leaving the minuscule mosquitoes alone. Mosquitoes make up less than one percent of a bat's diet. But I still agree that they are the best.
dan.blake.7583 9 years ago
Well the only problem I see is that, **mosquitoes aren't attracted to light**, though most bugs are (good ones, that eat mosquitos included) Those little blood suckers are attracted to CO2, they home in on Mammals that way. Gee, ever get bitten at night, in the dark !? There are CO2 based, traps out there.
And because light attracts other bugs, you cannot use it out doors. Bugs will just keep coming, and coming and......And I wouldn't want the kids around when a good sized moth flies into the chopper ! So this is one of those projects that while seemingly a good idea, in practice, doesn't work.
McAldo 8 years ago
I am not sure if there might be variability between species, but most definitely mosquitos in my parts of the world are attracted to light, even common incandescent houselights. When you step in a room where the light was on for a while, you'll see plenty outside buzzing against the windows. However, I agree that they are attracted to light, but not as much as moths and some other insects. We used to have an electric trap with UV lights. While effective, it ended up killing many more than more moths than mosquitos.
dgodwin3 8 years ago
I think it's a great idea that will work awesome "in practice" in my garage where I want to chop up every type of bug. Also gonna make one for the house. On movie night as soon as we shut off all the lights sure enough, 5 mins in a bug lands on the screen.
klaurson 9 years ago
geniesolver 9 years ago
High school kids in Lesotho created an elegant and very effective device to trap malarial mosquitoes. Make a small slatted box (slats must be angled 45 degrees or so. Place a small solar panel on top. Connect it to a fairly slow running fan. Spray a small amount of insecticide in if you have it. Place smelly socks inside the box. (any worn, sweaty clothing will do). Mosquitoes are drawn to the sweat, cannot exit the box, and eventually die in the fan or of exhaustion, or from the poison.