An Arduino Uno microphone sound sensor module detects sound levels using a built-in microphone. It converts sound vibrations into electrical signals, enabling sound-activated projects and audio lev ...

so tinkercad has circuit designand arduno now, a real arduino is $20, IDE is free, fritzing is free and does all the exact same layout stuff locally, you save your files and keep them forever.

To capture an instant on film or sensor with a camera, you usually need a fast shutter. But alternately a flash can be triggered with the scene in the dark and the shutter wide open. It’s thi… ...