Pixel Magic: Enthusiast Builds a Working Camera from a Computer Mouse Sensor

An electronics enthusiast going by the name Dycus has surprised the Reddit community with his latest invention. He built a working digital camera whose key component is the optical sensor from an old computer mouse. The heart of the device is an ADNS-3090 sensor, which normally tracks cursor movement, but in this setup, it serves as an image sensor. Despite its modest specs—a resolution of just 30 by 30 pixels and 64 shades of gray—the camera takes full-fledged monochrome pictures.

The developer didn't stop at basic functionality and added several creative modes to the unusual camera. Besides taking standard single shots, it can capture series of two or four photos, and even take panoramas by physically moving the device vertically. For fun, there's also a drawing mode that turns the camera into a miniature graphics tablet.

All the body parts were 3D-printed, and the assembly is so compact that some internal boards had to be secured with special tape. Inside, there's also 32 KB of non-volatile memory, which can hold up to 48 photos, and a single battery charge is enough for several hours of operation. Finished pictures can be viewed on the built-in screen, and for transferring them to a computer, the author wrote a special utility. The resulting images, although composed of a mere 900 pixels, remain recognizable and possess a distinct aesthetic reminiscent of early digital photography.

In the comments on the project, users started sharing other unexpected engineering solutions, such as using a RAM chip as an image sensor, proving that there's always room for unconventional applications of technology.

As it turns out, the highly sensitive optical sensors in ordinary computer mice can also be used to pick up sound vibrations and even convert speech to text with special software. Therefore, the same technology can serve both as a tool for creativity and a tool for surveillance, and this duality forces us to take a fresh look at the common peripherals that surround us.