Anti zap, buzz or shock :)

Have you ever been in a situation where you are scared to touch the handle of your door as you get zapped? 

Here's my personal solution! And it works, at least for me, and hope that will work for you also.

The main reason to get the zap is the difference in voltage between your body and the 0ish mass reference on the handle, or others conductive materials, that generate a mini-lightning on your hand! yayyyy….phenomenal! of course your shoes need to be perfectly isolating your body from the floor, which was my case :(

The idea I followed for the experiment and design, was to reduce the amount of current that discharge in that zap-microsecond, as this is the one affecting the physical feeling. This is done basically increasing the resistance between the source and the 0 mass reference. So, this is going to be your finger and the handle, or a nearby 0 mass reference

The system is designed to use a foil of aluminium coming from a soda can and with a specific design of the support, will allow to put in contact your finger with the upper aluminium part and subsequently when pressed, the bottom aluminium part will get in touch with the mass point and ignite the discharge process. 

There are 2 models here, designed in 3D with Freecad.

The model “Antizapp9” is the one that works and you have to print it on the side like in the picture here on the right. This is needed to get the springy part being printed properly, otherwise is it going to brake after 10 presses. Using the Cura tree support is also a must if you want to avoid excruciating time cutting and pulling out the supports. 0,16mm layer is ok or 0,2 is also fine.

Then you have to cut an aluminium, or whatever they use in the cans today, to get the part to be bended in half and insterted accurately and with some patience on one side of the base. Start with a 29x75mm and eventually according your print you might cut a little here and there. At least for my print, it worked straight away.

On the left you can see the part fully assembled and on then here below you can see the bottom part and one of my happy fingers. 

Now you can stick with a double tape on the side of the door….. if it's made of metalish material… and then every time before touching the handle, you just press the top side and push until it touches the base and you are free from zapping.

Then there's the second model "model7 test" that you can use to experiment with different foils materials with a side cut where you can put a resistor of your choice with the terminals inserted on the top and bottom holes you can see from a side and then use different foils materials and enjoy testing.