Odganjalec srn

thingiverse

Are you tired of deer wandering into your garden and eating your greens? Maybe it's time to install a deer repellent (not just for deer).\r\n\r\nWhen the device detects a change (presence), it starts beeping. The beep won't scare off any innocent visitors.\r\n\r\nA sensor called RCWL-0516 is used to detect intruders. It's an ultrasonic proximity sensor that activates an output for two seconds when it senses a change. This output is amplified by a transistor, which lights up the active piezoelectric buzzer.\r\n\r\nThe device runs on two 18650 rechargeable batteries connected in series.\r\nFor connecting the batteries, use these screws:\r\nhttps://www.aliexpress.com/item/32881285245.html?spm=a2g0s.9042311.0.0.27424c4dXIha5g\r\nBefore inserting it into the case, smooth out the ears on both sides of the PCB. Even without these ears, it's firmly attached.\r\n\r\nThe electronics are installed inside a glass jar with a lid. In the center of the lid is a hole through which a metal rod for attaching the jar is mounted. The rod has 8mm threads and is screwed into the ground. The length of the rod depends on your preference. I installed the device one meter above the ground.