The Vibration module based on the vibration sensor SW-420 and Comparator LM393 to detect if there is any vibration that beyond the threshold. The threshold can be adjusted by the on-board potentiometer. When this no vibration, this module output logic LOW the signal indicate LED light,And vice versa. Uses: For a variety of shocks triggering, Read more about Vibration sensor module alarm sensor module vibration switch SW-420[…]