All Questions
54
questions
5
votes
1
answer
217
views
Metal chassis grounding with wall wart supply, ESD test failed
We're building a device which takes its input power from a 12VDC wall wart PSU, and has a metal chassis. We just passed preliminary EMC/EMI test, but in the ESD test an 8kV jolt to the chassis killed ...
- 1,259
0
votes
0
answers
48
views
Questions regarding TVS-diodes and grounding
I am currently working with solutions to pass the ESD-requirements for EMC. I have used TVS (ESD)-diodes in the past to good result, but never really understood exactly why they work. Sadly, this is ...
- 11
4
votes
2
answers
530
views
Grounding ESD Table
I work in a manufacturing plant and we are setting up new ESD benches. Essentially, the table is grounded to the ceiling of the building and then multiple work benches are connected to that bench with ...
- 61
4
votes
3
answers
180
views
Separate ESD traces/layer?
I am designing a keyboard that connects through USB-C to a computer and has Aluminum chassis. I am dealing with ESD protection for the enclosure itself and some exposed components (that have a "...
- 163
5
votes
1
answer
711
views
Why does my TS101 soldering iron turn on LEDs upon contact?
An LED on my board turn on and stays on when I touch it with my soldering iron and it's freaking me out. This happens even though the board is just sitting on my (wooden) desk and not connected to ...
2
votes
2
answers
360
views
ESD safe soldering without PE
I live in a very old house that has no PE in it, so I can't ground the tip of the iron and myself as I should to solder in a ESD safe way. Is there any method to improve ESD safety of soldering, when ...
- 23
1
vote
1
answer
509
views
Chassis / Shielding Grounding on Mobile Robot
I am working on a project building a mobile robot.
I realized that the robot will have a buildup static when it is running because I can feel it when I touch it (uncomfortable spark).
The robot is ...
- 11
1
vote
3
answers
659
views
Grounding for working with electrostatic-sensitive devices
I'm planning one of my first electronics projects beyond basic repair soldering (it's a small pre-amplifier for a contact microphone). So I've got some JFETs and other pieces and would like to put ...
- 15
3
votes
3
answers
4k
views
How to connect antenna to oscilloscope?
I have zero experience with antennas and little experience with electronics. I need to detect weak radio signals in the range ~100MHz - 1.3GHz and analyze them with an oscilloscope.
I bought a large, ...
- 133
2
votes
2
answers
2k
views
ESD protection on floating circuit - Capacitor from circuit ground to earth?
I'm not very familiar with proper ESD protection and wondering about the correct implementation of a TVS diode to protect an input of an isolated circuit.
In the case of an ESD event into the ...
- 123
2
votes
0
answers
125
views
Designing a mains powered device in metal chassis, EMC/EMI/ESD/safety considerations for CE testing
I hope this topic is not too broad. I will formulate it as specific as possible.
I have read many articles and guides about EMC testing, but I am still unsure whether I am overlooking something ...
- 22.5k
0
votes
3
answers
351
views
ESD strap grounding location
I'm familiar with standard ESD control procedures (such as a grounding strap and/or mat) while working inside of a desktop PC. The general guidance for a standard ESD strap is to connect the strap to ...
0
votes
1
answer
231
views
ESD protection for RS485 with power bus, without earth
On my board there is a 4-pin connector as follow:
+24V DC (up to 6A)
RS485/A
RS485/B
GND
On the system there is no real earth, because there are no metallic parts (chassis, case, structure, etc...).
...
- 1,235
0
votes
1
answer
473
views
Solder station grounding setup
I have a Sugon T26 soldering station.
It has an European 2 pin plug, I have a 3 pin adapter for it.
As far as I am aware there will be no ground connection using this method.
It comes with a ground ...
1
vote
2
answers
1k
views
In an isolation transformer, to what is the electrostatic shield winding attached?
In the following diagram of an isolation transformer,
found on Wikipedia here for the diagram and also here for the definition of Isolation Transformer, there is a special winding in between the ...
- 2,892