There is a blue LED power indicator on the board

Analog output

The greater the curvature, the higher the output voltage

With zero potentiometer

The potentiometer can be used to adjust the output starting voltage

Pin output definitions are printed on the back of the board

(Bending the strain gauge can change the output voltage)

The module is connected to a 5V power supply, and the front strain gauge is slightly bent, the output voltage of OUT will change.

Question: How to use this and how?

This is a bending sensor

The principle of the scale is also to detect the bending degree. The strain gauge is attached to the carrier such as: iron, aluminum, plastic sheet, and then the carrier is bent. When the strain gauge detects the bending output voltage, the output voltage will change.

The strain gauge can be attached to any object to detect bending, and then our module bends to convert the voltage.

The working principle of the resistance strain gauge is made based on the strain effect, that is, when the conductor or semiconductor material is mechanically deformed under the action of external force, its resistance value changes accordingly. This phenomenon is called the "strain effect".

Attach the strain gauge to the object to be measured and bend it with the strain of the object to be measured, so that the metal foil inside bends with the strain. Many metals change their electrical resistance when they are mechanically bent.