# Engineer Builds AI-Guided Laser to Kill Mosquitoes > Source: > Published: 2026-06-04 15:54:05.191573+00:00 # Engineer Builds AI-Guided Laser to Kill Mosquitoes Computer-vision and robotics hobbyist Steven Cheng built an AI-guided laser system that he says eliminated all mosquitoes in his home, according to SlashGear. Tom's Hardware reports Cheng spent about **four months** creating the prototype, and collected a large dataset with a **DSLR** and high-magnification zoom lens, then trained a custom deep-learning detector that could detect and lock onto mosquitoes. The prototype pairs that detector with an aim-and-fire mechanism described by Tom's Hardware as an "artillery cannon," and SlashGear reports the laser was "instantly roasting" targets. SlashGear also reports the setup includes a second wide-angle camera and logic that cuts power to the laser if a human or flammable material enters that camera's line of sight. Editorial analysis: Hobbyist projects like this showcase small-scale object detection capabilities but highlight tangible safety and regulatory questions for practitioners. ### What happened Steven Cheng built a DIY system that couples computer vision with a laser to detect and destroy mosquitoes, as reported by SlashGear and Tom's Hardware. Tom's Hardware reports the working prototype took about **four months** to create and that Cheng trained a custom model using images captured on a **DSLR** paired with a high-magnification zoom lens. SlashGear reports the device uses a second wide-angle camera and safety logic that cuts power to the laser if humans or flammable materials enter that camera's line of sight. SlashGear quotes Cheng saying, "I successfully eliminated all the mosquitoes found in my residence." ### Technical details Tom's Hardware describes a workflow of dataset collection, manual annotation, and deep-learning training that pushed a consumer GPU: Tom's Hardware quotes Cheng saying the task "really put my graphics card through its paces." Both outlets report the detection model is used to guide an aiming system that fires a laser module when the model locks on a target. The outlets characterise the hardware as an "artillery cannon" paired with a detection pipeline; all technical specifics in this paragraph are drawn from Tom's Hardware and SlashGear reporting. ### Industry context Editorial analysis: Projects combining commodity cameras, custom datasets, and consumer GPUs demonstrate how accessible object-detection pipelines have become for narrow, high-speed targets. Editorial analysis: At the same time, integrating directed-energy actuators creates immediate safety, legal, and ethical considerations that go beyond typical maker projects; those considerations include unintended targeting, fire risk, and local regulations on lasers and weapons. ### What to watch Observers should track whether Cheng or others publish the dataset, model architecture, training details, or safety test data on social media or code hosting sites, as Tom's Hardware notes Cheng shared project details online. Also watch community discussion around safe interlocks, certification for laser modules, and whether platforms hosting build instructions moderate or remove content for safety reasons. ### Bottom line This is a proof-of-concept hobbyist build that demonstrates practical, narrow-object detection applied to a risky actuator. The technical achievement is notable; the broader implications are primarily about safety and governance rather than algorithmic novelty. ## Scoring Rationale The build is an instructive demonstration of accessible object-detection pipelines and hobbyist robotics, but it is a niche, localized project with limited technical novelty. Its main relevance to practitioners is safety and governance rather than model advancement. Practice interview problems based on real data 1,500+ SQL & Python problems across 15 industry datasets — the exact type of data you work with. [Try 250 free problems](/problems)