ElectroStatic Discharge, it's caused by accumulation of electrostatic charge as a result of rubbing, and can damage semiconductor devices like integrated circuits.

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Placement of ESD protection device on Motherboard and mating daughter PCB for PCB lines in plastic enclosure

I have a motherboard with a USB Hub IC. The USB lines are routed from the motherboard via a connector to a daughter board. This daughter board has the USB connector. The cards are inside a plastic ...
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54 views

How does a diode clamping circuit protect against overvoltage and ESD?

I always see this circuit when talking about overvoltage or ESD protection (does this circuit accomplish both, or just one?): However, I don't understand how it works. Say I put in 20V at Vpin. So ...
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1answer
81 views

What external factor could cause increased current draw?

I have a metal cased device powered by 2x 1.5v AA batteries with a standby current draw of 19.7 microAmps. If I then cause a build up of static by shuffling across a synthetic floor and touch the ...
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2answers
63 views

ESD protection for pH measurement electrode input

I want to puild a pH meter, which uses a normal glass electrode. Such an electrode behaves as a pH dependend voltage source (<+-500mV) with very high internal resistance (10MOhm - 1GOhm, depending ...
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329 views

Child-Safe setup for ESD protection environment on desk

I need to setup an anti-static workbench in my spare office, and kids sometimes get into it ever since they learned how to pick the locks. My intended approach is to: Lay out an ESD mat on the ...
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115 views

How do I use an antistatic wrist strap and mat

I will be building my very own PC soon and I brought both the Rosewill RTK 002 Anti Static Wrist Strap and Rosewill RTK-ASM Anti-Static Mat. As far as I know both the anti static mat and the wrist ...
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2answers
85 views

What methods are used to protect floating devices against ESD

In conventional circuits you'd like to divert your strike to ground and through a path that diverts the current safely to a grounded chassis or output. That is not possible in hand held devices for ...
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1answer
82 views

Preventing Reset during ESD

I would like to design a RC filter to prevent reset to a SoC during a ESD strike. Assuming the reset net is by default low. And the reset comes from a separate board which connects to the main board ...
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162 views

How to fix RaspberryPi HDMI-DDC/CEC issue while keeping ESD protection?

The RaspberryPi (Type B, all revisions before B+) shows a more or less well known issue with the CEC/DDC of connected HDMI devices. When powered down CEC between the connected TV set and other devices ...
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67 views

ATmega 1284P lockup or stuck in reset after lightening storm, then fully recovers. How to prevent it?

I have a custom Arduino based data collection system which has been running happily, reporting data over a cellular connection on solar power for a few months. After a lightening storm it stopped ...
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82 views

What components can be damaged through 10KV ESD?

I'm designing a circuit which has Voltage regulator(IC), current source(IC), resistor, capacitors, LED, reed switch and capacitor. It has to survive 10KV ESD event. My question is: 1) What components ...
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121 views

Best practice for Lightning/Surge Protection on PCB

What is best practice/recommendation when I want to protect against lighting/surge? More specfically, my application requires passing the following test: "ANSI/IEEE C62.41---1.2/50 microsecond ...
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2answers
225 views

5v tolerance on 3.3v PIC

Many PIC microcontrollers such as PIC24EP512GU810 have 5V tolerant pins. My question is how does this work. Do these devices have clamping diodes for ESD protection? Would clamping the input voltage ...
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0answers
47 views

Certifications and ESD

I am designing a board (an eval board). We intend to go for certifications (CE and FCC). I have very small awareness of such things. Of concern to me is ESD among other things. I know that I will need ...
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3answers
154 views

Setting up a non-ESD area in a lab

this question is regarding standards and/or best practice guidelines for ESD control in a professional lab environment. We are currently tightening up our (admittedly too lax) ESD control in the ...
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1answer
107 views

Do I *need* a TVS Diode at the USB connector?

I've got a typical electronic trinket that will be connected to laptops and wall warts to recharge. Fairly cost-sensitive. Will a spark completely destroy the MCU with a USB peripheral? Is there a ...
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1answer
83 views

Simple ESD mat and wrist wrap setup

I have a hard time finding a how-to. I would like to set up a simple ESD mat and wrist wrap, but I am not sure about is the the 1 MOhm resistor should be, if at all. Several options: 1 MOhm from ...
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57 views

ESD protection for sensitive electronics

I've developed an electronics system that is comprised of box (power supply, board w/ FPGA etc) and a separate accessory unit that connects to the box via a 6 conductor cable. The conductors in the ...
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3answers
125 views

Oscilloscope gear and ESD

The answer might be obvious, but I am curious, how well are oscilloscopes and probes usually protected against ESD? I noticed that oscilloscope probes are usually shipped in esd-protected bags. On ...
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1answer
84 views

Did ESD fry my REF200 current source circuit?

Last summer I built a current source to power a custom-made pressure sensor. This source uses a REF200 IC and is powered by a wall wart that outputs 5V. The whole circuit is encased in a plastic box ...
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305 views

Does AEC-Q101 Certification mean a part has some ESD protection?

I'm working on picking out some FETs and would like to use some with ESD protection. While picking some parts out on Digikey I keep coming across datasheets that say AEC-Q101 compliant or sometimes ...
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2k views

Anti-static vs. conductive vs. dissipative foam?

UPDATE: I have included some basic answers inline that I received after talking in depth with an application engineer at a foam company. I think it would still really help for someone to help flush ...
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1answer
130 views

DIODE as capacitor?

How does Diode act like a capacitor when voltage across diode is less than forward voltage spec. Basically when diode is turned off? What is its usual capacitance when diode (zener) is turned off.
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1answer
262 views

Optocoupler TVS Protection for digital input module 24V 220V

I have two digital input modules that must match: IEC 61000-4-2 ESD Contact 6kV and Air 8kV IEC 61000-4-4 EFT 1kV IEC 61000-4-5 Surge Line to line 0.5kV and Line to Earth 1kV First module: 32 digital ...
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1answer
83 views

CAN bus ESD protection

For a CAN bus application, is it correct to connect an ESD protection IC to GND, or chasis of the device?
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79 views

Is ESD mat toxic? [closed]

I bought a 3-layer vinyl ESD mat for my lab and OMG this thing smells so bad. After several hours I can't even enter the room. Is it toxic? What do you do with your mat?
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107 views

ESD Protection Necessary for Water Detection Circuit?

I'm using a water detection circuit similar to the one found here I put it all together and it worked pretty well for a hobby project. The circuit hinges around an AC signal that's generated from a ...
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144 views

STMicroelectronics EMIF08-1502M16 ESD Protection and EMI filter output for 16-bit LCD interface

Hello everyone we've designed a circuit which is about an LCD driving on SSD1963 IC with 16-bit interface and it was normally working but we tested the ESD of the product the screen was going halt. ...
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3answers
452 views

Wood workbench as ESD protection?

ESD protection are really expensive for hobbyist like me. I have a grounded wrist strap but do you think a simple non-treated wood workbench surface can replace a really expensive ESD tabletop ?
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1answer
91 views

Where to send voltage peaks while ESD-protecting a subcircuit? To a subcircuit Vcc or to a global circuit Vcc?

I am going to use ST DALC112S1 (http://www.st.com/web/en/resource/technical/document/datasheet/CD00001317.pdf) to protect the SIM card connection between uBlox Leon G100 and the SIM card holder (VSIM, ...
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1answer
106 views

Micro Protection with Long Cables

I have a micro controller ATxmega128A1U (datasheet) which will have switches and potentiometers attached to the GPIO and ADC input pins. These inputs will have about 2-3 meters of cabling from the ...
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1answer
126 views

Wearing “conductive shoes” instead of heel grounders?

I've been looking into alternatives to heel grounders since they're kind of cumbersome to put on and take off often (not to mention being uncomfortable) and I'm considering buying a pair of ...
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2answers
83 views

Can wrist strap be attached to running PC?

Sorry if this is a noob question... I've Googled for instructions on how to use a wrist strap, but most of the answers I've seen assume that you're going to be opening up your PC and installing or ...
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3answers
275 views

What are ESD (Electrostatic Discharge) precautions?

In some device datasheets there is a caution about ESD (Electrostatic Discharge) precautions. These devices are prone to damage because of electrostatic charges made by human body. These charges may ...
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249 views

Purpose of exposed ground pads

I have a Beckhoff EL2008 8-channel digital output terminal that I took apart because I'm using an ASIC that is inside the module, Beckhoff's ET1200. There is essentially a ring of ground pads,some ...
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2answers
232 views

ESD protection on perspex electronics enclosure

I've bought some high power electronics with some sensitive components. Since they are just bare boards straight from the manufacturer, I have constructed a perspex surround with fans facing the ...
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1answer
634 views

Reducing the clamping voltage of a TVS diode

Followup to my previous question. I'm designing a product powered from a 5V supply that feeds it into a TLV1117LV33 LDO. Typical current draw for the project is less than 500mA, but the regulator is ...
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1answer
276 views

Tips on ESD protection for hobbyist designs

I'm finally getting into simple PCB design for my personal projects, and I'm concerned about ESD protection on exposed parts of my board like USB ports. I know how wrist straps work and I understand ...
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2answers
282 views

ESD protection of capacitive touch doorknob circuit?

This is a follow-up to my question: How can I use a generic doorknob as a capacitive touch sensor? I am now ready to move beyond the proof-of-concept stage, but I have not yet learned of a ...
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3answers
142 views

uC -> wire -> LED in metal enclosure. ESD/EMI protection

I need to blink a LED with a LPC micro-controller. Enclosure is solid aluminum. LEDs will be on a separate PCB 20cm away from uC PCB and protruding from the metal enclosure. What would be the simplest ...
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228 views

Regarding ESD diode's architecture

I need one clarification regarding ESD,EFT and SUrge protectors. Different manufacturers have architectures of diodes+Zenar diode combinations for different protection levels for different interfaces. ...
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3answers
237 views

Cheap ESD/safety Mat

I need to get some sort of ESD/safety mat (2 actually) for working at home to protect myself and equipment. I was wondering what to look for/avoid if I were to purchase a rubber mat from a rubber ...
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1answer
77 views

Is it OK to connect ESD plug through an RCD?

I am thinking of rewiring some of my workshop with a RCD spur for my machine tools and bench and an emergency stop. I use an ESD plug to ground an antistatic mat when working on electronics on the ...
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1answer
239 views

Why would one NOT buy ESD-safe tools? [closed]

For audio work, Arduino work and other electronics projects, why would you decide NOT to buy esd-safe screwdrivers, pliers, cutters and tweezers?
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3answers
390 views

Static-sensitive high-precision resistor?

I just received some 10K .1% precision resistors from Digikey (part number PTF10KECT-ND). Unlike all their other passive components, which come in a normal plastic bag, these came in a metalized bag ...
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3answers
307 views

ESD sensitivity of P-channel MOSFET vs N-channel

It is well documented that N-channel MOSFETs are extremely sensitive to ESD damage. I've personally killed more than one. Are P-channel MOSFETs just as sensitive? I'm thinking that, since the ...
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3answers
3k views

Ideal temperature and humidity for preventing problematic ESD conditions?

I know manufacturers often keep components sensitive to ESD problems in climate controlled rooms and I'm just wondering what the ideal temperature and relative humidity is to prevent ESD problems?
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3answers
398 views

How do I know I'm not drawing too much current for my 3.3V supply?

Continuing my learning expedition, I've decided to use the LM3S5R36-IQR80-C3 ARM Cortex-M3 MPU, to try and learn to build my own little experiment PCB, almost like the Teensy 3.0. The idea is to learn ...
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434 views

Can BJT transistors be damaged by static electricity?

I'm wondering whether they should be stored in anti-static bags or not?
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3answers
543 views

Does lacquer coat protect a PCB from ESD damage?

Does lacquer coat protect PCB from ESD? It seems that it actually does, because lacquer is isolation and it's a barrier from my body to the circuit. But I'm not sure.