40 votes
Accepted

What's the difference among these static protection bags?

There are two types of anti-static bag: static-dissipative (pink, red, or occasionally black) and static-discharge (silver or grey). Static-dissipative bags are designed to remove any static build-up ...
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  • 1,306
32 votes
Accepted

What is the smallest metal object you can ground yourself with?

If you are installing a CPU in a motherboard, you don't really care about grounding - what you really want to do is to make sure that you, the CPU, and the motherboard (and any tools) are all at the ...
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29 votes
Accepted

Is static electricity really so dangerous?

Is static electricity really so dangerous? Yes. The conductive paths inside an IC are really small, so it doesn't take much energy through them to vaporize them.¹ There are millions of such paths ...
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  • 3,702
27 votes

Anti-static mat connected to earth directly or 1E6 ohm resistor?

You (and the some of the other answers) focus too much on the actual value of the resistance to ground; the fact is that the actual value is irrelevant regarding ESD. The ESD charge just needs a path. ...
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25 votes
Accepted

Why is there a voltage between the mains ground and my radiator?

I measure 1VAC and 20mV DC between ground and my radiator. I would consider that negligible. Very likely there is a connection somewhere between your radiator and ground. It might be a long path ...
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24 votes

How would I test the continuity of an anti-static wrist band?

Overview: A good wrist strap system has a large resistance between the skin contact and ground. Typically this is 1 MΩ, which is relatively large. This large resistance is there for your safety, in ...
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  • 17.7k
21 votes
Accepted

ESD - Is it safe to connect yourself to an electrical outlet?

If your plug has a correctly wired earth pin, then you can use that to ground yourself. However before you do, it is worth noting that all reputable ESD wrist bands contain an embedded 1MOhm resistor....
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19 votes

Should there really be 1 MΩ resistance between an anti-static wrist strap and a pc?

The 1meg resistor is needed to safeguard the user from faults from other equipment connected to mains earth. Keep in mind that the wrist strap is a permanent connection to the electric system of the ...
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18 votes
Accepted

Antistatic mat , how it works?

First, the mat (and the connection to mains earth!!) should have a resistance that is high enough to cause no (extra) harm to you when 'normal' Voltages (let's say up to mains level) are involved. ...
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16 votes

Anti-static wrist strap around your wrist or around your ankle?

It makes no difference where you connect the anti-static strap to your body. The reason is that your body is much lower resistance between any two points than the strap is. Also, most of the ...
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11 votes
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Avoiding static shocks from vehicles

In most cars, you are isolated from the chassis when you're driving: everything is plastic, leather or textile. When you get out of your car, friction can rip off charges from the electrically neutral ...
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11 votes

Anti-static wrist strap around your wrist or around your ankle?

Electrically, it doesn't matter where it makes contact, with contact being the key word! I find however that it doesn't suit my workflow round either wrist or ankle. If worn on my wrist, the ...
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  • 143k
11 votes
Accepted

Electrostatic precaution for sensitive chip

Even if I doesn't take such precaution, chips behave as expected. Is that normal? Yes, ESD is an unpredictable event, and you can't see it (most of the time, sometimes you can see damage on IC's). ...
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  • 64.4k
11 votes

How to convert a metal work table surface for electronic work?

While it is risky, if done properly, can provide an ESD safe place to work. Since you live on the beach near LA, this may be of no importance. Humidity above 60% or so makes ESD protection somewhat ...
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  • 2,087
11 votes
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Would a silicone mat (not anti-static) placed on a truly ESD anti-static mat become anti-static?

No, it would not. There's no conductive path through the silicone mat, so all having a proper one underneath it does is create a weak capacitor to ground, which doesn't help you.
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10 votes

Anti-static mat connected to earth directly or 1E6 ohm resistor?

Here is an excerpt from chapter 7 of Note: copying images because PDF files are protected and text cannot be copied. BTW: here you will find the entire book freely: OP AMP APPLICATIONS.
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10 votes
Accepted

Antistatic bag inside plastic bag?

No, it will be fine. Just take the inner ESD bag fully out of the outer bag before removing the motherboard. The ESD bag ensures that all parts of the motherboard are at the same voltage. Any ...
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  • 15k
9 votes
Accepted

Can anti-static tweezers replace wrist straps?

No. "Anti-static" tweezers serve a different purpose than a wrist strap. A wrist strap keeps your BODY from building up a charge which can damage a component. Antistatic tweezers provide a "...
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9 votes
Accepted

Static shocks all over the building

Can static shocks occur from grounded and ungrounded metals? Yes. A large ungrounded object still has capacitance. If there is a higher density of electrons on you than on the object, the electrons ...
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  • 9,408
9 votes
Accepted

Connect anti-static wrist strap to earth wire?

There are several considerations for your wrist strap. A) Safety for you B) Safety for your fragile components and kit C) Process, use them correctly D) Grounded? A) Your safety Your wrist strap ...
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  • 143k
9 votes

Can I clip an antistatic wrist band to an extension cord ground pin plugged into my wall outlet for laptop work?

Using the safety ground on a three prong outlet is a valid way to ground yourself for ESD purposes. Many lab benches I have used have the ESD mat grounds attached to the ground that comes from a ...
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  • 10.2k
7 votes

Child-Safe setup for ESD protection environment on desk

Get yourself one of these guys, and wire your ground into it. For good measure, double insulate the hot and neutral lugs inside the plug. The worst the kids will be able to do is unplug it, and they'...
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  • 13.6k
7 votes
Accepted

Is it necessary to have insulator sheets between PCBs and antistatic mats?

A decent quality rubber antistatic mat will have a low end top surface conductivity of \$ 10M \Omega \$. Working with an audio circuit where the highest impedance is a \$100k\Omega\$? You'll never ...
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  • 13.6k
7 votes

Is static electricity really so dangerous?

ESD is based on the fact objects can hold a static charge, e.g. when electrons are scraped off them by friction; contact with another object creates a destructive transfer of charge if not properly ...
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7 votes

Should there really be 1 MΩ resistance between an anti-static wrist strap and a pc?

You have two questions which you think are related since they both concern ground connections. However the questions are not related ! Q1) The actual ground connection, where the return current from ...
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7 votes

Resistor or low impedance path between common ground point and mains earth?

If by plan B you mean to add a resistor to the mains ground, then no plan B is not an option. If you add a resistor in series you will have two problems: 1) It affects the saftey of the earth mains,...
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  • 64.4k
7 votes

Bonding yourself via GND pin of an USB-port?

You should NOT connect your anti-static gears to USB ground pin. The USB ground is SIGNAL GROUND. An ESD event can surge along the signal ground and elevate its potential relative to other ICs inputs (...
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  • 37.5k
6 votes
Accepted

Do antistatic gloves help avoiding ESD?

You are right. If you wear gloves, they should be sufficiently conductive so that their surface does not retain a charge, which gets discharged through you to your connection to ground. The purpose ...
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  • 143k
6 votes
Accepted

What makes my screwdrivers ESD safe?

What is special about these screwdrivers that makes them ESD safe compared to other screwdrivers? The data sheet for that T4741SESD screwdriver set explains that: The handles are [...] ...
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  • 16.7k
6 votes

How to make an anti-static vacuum cleaner?

ESD vacuum cleaners aren't a scam. Static discharge from a regular vacuum cleaner can definitively damage sensitive electronics. It's not only the nozzle. The whole housing is made out of ESD ...
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  • 1,314

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