How to Make a Grounding Wrist Band.




In my life i deal with lots of sensitive electronics every day and frying these electronics is a big
concern when touching them. Most people think its hard to fry electronics with static electricity.
Its not, one touch could send your $100 graphics card down the drain if you aren't properly
grounded. Do you really want to risk it for the sake of ~$2 in parts?

In this instructable i will show you how to make a grounding wrist band from some basic
electronics that you probably have lying around, if not, its a few bucks.

Anything demonstrated in this instructable is for educational purposes only.
I cannot be held responsible for any injury or death caused by the information on the
following pages.

Step 1: Materials You Will Need.

The things required for this instructable are:
1. Some kind of wrist band. A piece of paper will do, i used a strip of rubber.
2. Aluminum foil. Not too much, enough to line the inside of the wrist band.
3. Adhesive. To attach the foil to the band, i used double sided tape.
4. Alligator clip. Doesn't have to be one but it makes stuff easier. Wire will do.

Optional Stuff:
1. Extra wire (to make it longer) Curly phone wire is awesome for this!
2. 1 mohm resistor (for safety if you want it)
3. Mains power plug with wire coming off it.

Step 2: Making the Wrist Strap.

Okay, to make the actual wrist strap we are going to need the strap material, i used rubber and the foil you have.
First cut out a section of foil that will cover the inside of the strap.
Then we need to attach it to the strap, i used double sided tape. Glue would work too.

Step 3: Attach the Alligator Clip to the Strap.

This step is pretty self explanatory, attach the alligator clip to somewhere there is foil, it doesn't
matter where, as long as it is touching the foil.

Step 4: The Other Side of the Alligator Clip.

By now you are probably thinking "wait, wheres the other side of the clip go?".
The other side of the alligator clip has two possible places to go.
One is into the mains ground and the other is onto your pc case.
Step 5 is for the mains route and step 6 is for the pc case route.

Step 5: Connecting to a Mains Ground.

This option is slightly more dangerous if you do NOT know what you are doing, nonetheless
its perfectly safe if you know what you are doing around mains power.

Pretty much, you will need to locate the ground/earth wire in your mains cable.
For me, it was green. This may be different in your country so be sure to check first!
If the other wires are exposed, be sure to cover them up with electrical tape.

Step 6: Attaching the Alligator Clip to Your PC Case.

The other option for this instructable is to connect it to your pc case, this may be more desirable for some people, i don't really care which you pick, its up to you.

This step is really easy, just connect the alligator clip to someone METAL on your pc case.
This will automatically ground you as your pc case is connected to mains ground.

NOTE: Your pc must be plugged in for this to actually work.
It doesn't have to be on just plugged into a wall.

Step 7: Additional Stuff You Can Add.

Y'know the extra stuff in the first step? This is when they come into play.
The wire is just for convenience while the resistor is for safety.

To add in the wire, just place it in between either your pc case or your mains ground.
The same goes for the resistor, anywhere in between you and the ground is good.

The reason for the resistor is just encase you do come into contact with live mains (240/120v)
it could save your life. The resistor acts as a current limiter.
Therefore, if you had the band on your left hand and your right hand came into contact
with a live wire the resistor would limit the current able to flow through your body thus
possibly saving your life, without the resistor, any amount of current could flow through.
Most likely killing you.

If you find any mistakes in the instructable, want something added or have a question.
Reply below or email me at



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    16 Discussions


    4 years ago on Step 7

    The part where you use a mains plug to grown the strap is incorrect. the chance of coj6act with the live wire is too great. I would suggest either of these two alternatives.

    The harder option:

    Obtain a plastiv childproofing outlet protecter and replace metal flat peongs on cord with it.

    Easier, better option:

    Make use of the little screw in the middle of the outlet ifnyou have one. This screw is always grounded (in the US), remove screw, place bolt down wire aroind hole, replace screw, attach clip to small grounded wire. (this may be difficult to follow, but common sense would be to google "outlet grounded screw" and figure it out from there)

    1 reply

    Reply 1 year ago

    Completely wrong. Plugs are designed to have an Earth pin that works. If it's wired correctly then there's zero risk of contact with live. If that was true then the chassis of electronics would not be Earthed for fear of them touching live.
    Your suggesting of bodging a plug together is considerably more danagerous.


    3 years ago

    The construction details are great!

    However, your comment that the computer must be plugged in for grounding to the case to work is fundamentally incorrect. Grounding to the case works because the electrical potential between you and the motherboard is equalized via the case. Having the computer plugged in does nothing except create a risk that the computer is powered on without you knowing it.

    Grounding to Earth (via the plug method you suggest) is even more wrong as it is possible that your computer is not at the same potential as Earth. In fact, you've mixed these up, if you are grounded to Earth THEN your computer needs to be plugged in or otherwise grounded to Earth as well (such as connected to the grounding post, grounding screw, plumbing system, etc.)

    The best way by far is simply to connect to the case, then you are guaranteed to be at the same potential as the computer irrespective of Earth.

    BTW, the resistor also prevents the static discharging suddenly through the alligator clip. This could be important if working on something other than a complete PC.

    1 reply

    Reply 1 year ago

    So I have to connect the strap to the ground of the electronics?

    That would be more sensible. In my country for instance, the ground for grid is not enforced as standard, so the outlet only has two holes instead of a third one.

    Yes I know that it is dangerous, so proper grounding is customized so that stuffs like washing machine is grounded. On the other hand, PCs and stuffs are left ungrounded for years.

    Thank you for the guide. I wear a silver wrist band. I suppose it's not pure but it was made by a jeweler so I suppose it contains a fair amount. Do you think I could use it with the cord? Thank you.


    5 years ago on Step 7

    quick typo. you may want to use "in case" instead of "encase". I love the 'ible. i will definitely be using it. I need one to take apart my laptop so i can send the motherboard for reballing. Keep up the good work!


    9 years ago on Introduction

     Awesome instructable!! I wish I made and used one of these yesterday when I was taking apart a computer and putting the parts in my arcade machine because I had taped some wire to my wrist then taped the other end it to my pc case. That was painful because the wire was poking me and my wrist was all red but luckily I did not wreck any of my computer components. 5 stars.

    1 reply

    Reply 9 years ago on Introduction

    Thanks mate! I did the exact same thing when i was working on my server pc, i just got sick of it... when i was building my gaming pc, i bought a real one...

    instead of the foil you could just use a coin (just thinking that the foil can not be very comfortable).

    Doctor What

    9 years ago on Introduction

     This seems a little impractical, considering it costs just as much to make one of these from scratch as it is to just buy one.  You can grab one off of amazon for like three dollars.

    Considering when you are working with electronics (more specifically, computers), a simple charge (as few as 10 volts) can mess up a component, you don't really want to trust a strip of fragile aluminum foil.  What you save (maybe, like, 10 cents in supplies), is not worth losing a 1000 dollar machine.

    2 replies
    SmAsH!Doctor What

    Reply 9 years ago on Introduction

    I know your point, i didn't really make this instructable for people working on 1k+ pc's, more people working with $5 mcu's like me that are lazy.
    When i get my parts for my gaming pc in a few weeks i know im gonna get a proper grounding strip for me.


    Reply 9 years ago on Introduction

    Yes, but the problem with that is some stainless steel watches have a coating over them, so check if its conductive first.