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Published on Apr 28, 2019
Use an Arduino, a LED matrix and a phototransistor as an input device.
Ordinary digital cameras work by using a large array of light sensors to capture light as it is reflected from an object. In this experiment, I wanted to see whether I could build a backwards camera: instead of having an array of light sensors, I have just a single sensor; but I can control each of 1,024 individual light sources in a 32 x 32 LED matrix.
For build instructions and code, visit my Instructables page: