Doorbell Bracelet for Hearing Impaired

There has always been a vulnerable group around us. Because of their physical defects, they can't live as easily and happily as normal people. We need to pay more attention to these vulnerable groups. In this scheme, a bracelet is designed so that the hearing-impaired can "hear" the knock on the door and the electricity from the mobile phone. When someone knocks or rings the doorbell outside, the bracelet will vibrate and the indicator light will flash. When the mobile phone is connected with the bracelet wirelessly, the ring vibration and indicator light warning will be triggered by the call