Color sensing (as well as detecting empty spaces) settled on IR-based sensors commonly used in line-following robots. You can watch the clock in action in the video embedded below just under the ...

An IR sensor is located near the TV and wired to ... High-end, third-party remote controls use radio frequencies (RF) instead of infrared. Such remotes neither have to be aimed, nor even be ...

Here you can find the circuit diagram for the Bidirectional Counter using Arduino. The circuit diagram below represents how ...

Mount a cheap Harbor Freight non-contact thermometer on a 3D printer carriage and use it to scan the target ... way to communicate with an $11 IR temperature sensor might come in handy someday.