{"id":64898,"date":"2026-06-28T04:34:52","date_gmt":"2026-06-27T19:34:52","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=64898"},"modified":"2026-06-28T04:34:52","modified_gmt":"2026-06-27T19:34:52","slug":"the-switch-is-off-but-it-wont-stop-capturing-the-mystery-of-coil-oscillations-with-a-sensor-easysense-v-hub","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=64898&lang=en","title":{"rendered":"The Switch Is Off, But It Won’t Stop! Capturing the Mystery of Coil Oscillations with a Sensor (EasySense V-Hub)"},"content":{"rendered":"

I’m Ken Kuwako, a science trainer. Every day is an experiment.<\/span><\/p>\n

The moment you flip a switch off, the current should drop to zero \u2014 or so you’d think. But a coil doesn’t give up that easily. It clings to the current like it has something to prove, sending voltage into a wild, oscillating frenzy. In this post, I’ll show you a demonstration experiment that makes this “stubbornness of coils” visible using sensors.<\/p>\n

Circuit Setup and Preparation<\/h3>\n

I used a sensor to demonstrate electrical oscillation. The setup is simple: build the circuit shown below, run a current through a coil, then suddenly cut the switch. A voltage sensor then measures what the coil does next. I used the EasySense V-Hub for this.<\/p>\n

\"\"<\/p>\n

Here are the sensor settings. In manual mode, set the measurement time to 200ms (100ms also works), the sampling rate to around 2000, and specify the trigger condition accordingly.<\/p>\n

\"\"<\/p>\n

And Then\u2026 a Beautiful Wave Appeared!<\/h3>\n

Here’s a video of the actual experiment:<\/p>\n