1. Determine whether there are objects through the device. 2. Light Weight with only 3g. 3. Works well with luminous diode and photo-transistor. 4. Apply for Burglar alarm,Electric door and Non-touch switch. 5. Build an emple circuit with LED to make an reminder light.
Features
1. Determine whether there are objects through the device. 2. Light Weight with only 3g. 3. Works well with luminous diode and photo-transistor. 4. Apply for Burglar alarm,Electric door and Non-touch switch. 5. Build an emple circuit with LED to make an reminder light.