Deskripsi : 1. using the highly sensitive switch SW-520D as the angle sensor. 2. the comparator output signal is clean, good waveform, driving ability, more than 15mA. 3. the working voltage of 3.3V-5V 4. the output format: digital switching outputs (0 and 1) 5. a fixed bolt holes for easy installation 6. small PCB board size: 3.2cm x 1.4cm 7. using a wide voltage LM393 comparator