Safety for children is the first thing to be respected!!!!

I designed this car accessory to avoid (at least an additional warning to the driver of the car) to leave a child on board and avoid the worst.

For the operation of the gadget you need a compression spring with an external diameter 5x50 (see link below)

JINGERL 10pcs Molla a Compressione del Filo in Acciaio Inossidabile, Diametro del Filo da 0,8 mm * Diametro di 5 mm * (5-50) mm Lunghezza (Size : 0.8x5x10mm) : Amazon.it: Commercio, Industria e Scienza

AFTER INSERTING THE SPRING, CLOSE WITH THE BACK PIECE (IF YOU WANT YOU CAN GLUE OR ADD DOUBLE-SIDED TAPE SO AS NOT TO HAVE PROBLEMS WHILE DRIVING)

The functionality (obviously mechanical and not electronic) is very simple:

Attach the gadget to the air vent thanks to the built-in gripper;

just hang your wireless car keys or an object that you can't forget on the hook;

This will lower the slide and you will see the signal (baby on board) appear.

The moment you have to get out of the car and go to get the hanging object, the signal jumps out at you (baby on board) and you remember (in case you forgot) to let the child get off too.

Obviously, reliability lies in remembering to "activate" the signal, so it reserves any responsibility.

Enjoy printing and be careful not to leave the children in the car!!!

We appreciate your review, opinion for any improvements or adjustments on the project