4

Yes, you can get sufficient current through the floor, the carpet, and your shoes to get a painful or even deadly shock. I've gotten some painful zaps by accidentally touching a live wire that was supposed to have been turned off, and that I was pretty sure was turned off. I've been zapped while standing on an insulated ladder that was on a dry, tiled floor ...


3

The card is currently connected to V+ and V- only for taking measurements... I took a few measurements and some values are on the low side, while one of the pins gives me voltage where it shouldn't... 1 = slowly dropping from 7V (instead of 0V) This is expected. Pin 1 is connected to the Base of TR1 via a 10 μF capacitor. If power has been switched off for ...


2

Unfortunately, the ground strap alone is not going to do much good if you are using a plastic table which is just as likely to have static charges sitting on it as you are. A common solution to this is to use a ground strap with an ESD mat like this picture shows here (source is esdmat.com). The mat is static dissipative, and can be plugged into the ground ...


2

I have little doubt in recommending the first circuit (redrawn slightly to fit the page better and with extra added information): - The object of this exercise is to keep the fragile and sensitive Arduinos away from the chassis ground connection. This means opto-isolated inputs for all ground referenced sensors. grounding Arduino's buttons for logic level ...


2

I would like to add that the missing grounded C connections are much smaller than TI's datasheet, but exist with the close proximity of the aluminum backplate attached to PCB ground for EMI suppression and therefore has an equivalent circuit, if you also used a similar grounded backplate. If the circuit is balanced by good component and parasitic ESL ...


1

Can you Touch Live Wire Without Shock? ... if you are standing on an insulator Can you? Yes. Should you? No. If you are properly insulated from any grounded conductor, then if you accidentally touch a live wire, little to no current will flow. What little does flow is due to the stray capacitance between your body and earth, in the order of 100 or so pico ...


1

Most likely issue is the use of one or more sub-standard items. The HDMI to DVI adapter does not connect the metal shell of HDMI and DVI connectors together, so the shields of HDMI and DVI cable that should be connected together are not. Also both the DVI and HDMI cables have more than one ground pin, for example each high speed differential pair has a ...


1

Grounding -ve input to Vee=0V disables it. You can use a differential input to Vin+ and Vin- but ONLY if the DC gnds and supplies are floating with respect to each other. Otherwise do not! Also do not put a cap across the Vin- to the rail. That will destabilize the internal feedback and it may oscillate. You can't AC ground the Vin+ and use Vin- either. ...


1

In a vehicle you really have no choice - ground IS the chassis. You can get your 0V from the battery or the chassis - they’re tied together with heavy wires. I’d suggest you have a look at the wiring diagram of a late model vehicle to get an idea of how the manufacturers resolve your issue. The average vehicle has a number of electronic control units ...


1

Thanks for a well presented question. Page 19 of the referenced TI datasheet suggests the output filtering is optional. Depending on the target market and the exact application, Sony have determined it was not necessary. They may have put a common mode choke on the speaker wires. TVs are a high volume product and heavily cost engineered to specific markets. ...


1

If you look into the docs: https://www.makerfabs.com/desfile/files/Nokia5510LCD.pdf You'll see that metal case isn't mentioned at all, it simply isn't relevant for the COG. There is no requirement for it. In practice this means that it should be left disconnected, and that way prevent human-generated ESD from reaching COG through metal casing.


1

I spent some years in pro-audio (at the time when systems were starting to contain more and more digital blocks, both for DSP and for control) and I never really came across a clear or definitive answer to this. In building large systems (by which I mean a central equipment rack with anything from 10 to several hundred external units, which were often ...


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