How to Make Security Systems using Arduino nano, ultrasonic Sensor, buzzer, jumper wires, bread board, 9v battery and 9v battery connector for arduino nano. Things required with amazon links. Ultrasonic Sensor: https://amzn.to/36H48fo Arduino nano: https://amzn.to/36HilsM Buzzer: https: //amzn.to/2FAYsYC Bread Board: https://amzn.to/2scP3mQ Jumper Wires: https://amzn.to/2t6QCTR For arduino code of this project, visit the link below. https://arduinomall.blogspot.com/2020... ultrasonic sensor, ultrasonic sensor arduino, ultrasonic transducer, security systems • How to Make Security Systems using Arduino... Please like, share and comments below and don't forget to subscribe for more such interesting videos. Thanks for watching.