3
Based on the photo, the thing is set for 3.3 Volts. To set it for 5 V, move the black jumper to cover the center and right pins.
2
grounding the common doesn't put current into the ground because current only flows in circuits. and as the transformer secondary is isolated there is no circuit through ground
simulate this circuit – Schematic created using CircuitLab
by grounding the trasformer secondary they can use a transformer with only functional insulation. With it isolated ...
2
The intent of grounding the chassis isn't to help with troubleshooting.
People are assumed to be at ground potential and/or connected to ground somehow by virtue of the inability to hover. The chassis is grounded so that if a hot wire gets loose inside and makes contact with the chassis, the current will take the easier path to ground through the low ...
2
Obviously, it isn't the electrical connection to ground that's causing the problem. Instead, the physical flexing of the PCB is either causing an open or a short somewhere nearby. In older equipment, it would not be surprising to find a hairline crack in the PCB itself or one of the nearby solder joints.
Or, it could be that the tip of the screw itself is ...
2
This is just equalization of voltage between the two isolated and ungrounded (thus floating) switchmode power supplies in your TV and PC.
It is not dangerous, since the chassis exterior of the connector will always connect first on all connectors where this could cause damage.
Unless you own non-compliant cables or somehow manage to contact the pins before ...
2
I think what's missing is an appreciation of why an electric guitar is the way it is.
The wiring of an electric guitar is basically UNCHANGED since the introduction of the iconic Les Paul and Tele/Stratocasters in the 50's. So what you have is an instrument that's designed to work with the amplifiers of the day. Virtually every electric guitar from every ...
1
The purpose of grounding electric guitar strings would be only to ground the guitarist in contact with them and thereby prevent ambient electrical noise, picked up by him/her, being passed on to the amplifier. Such a grounding would make for a quieter guitar and would neither complement nor compromise the safety of the guitarist, who would anyway be exposed ...
1
it's possible for the common or neutral side of the line to be out of phase with another power outlet or piece of gear. So, instead of the chassis and all common parts sitting at ground potential, they're at line potential relative to another piece of gear.
No professionally designed equipment will have that possibility unless multiple faults occur. The ...
1
Yes, it definitely is the ground pin.
Devices which have ground pin must be connected to grounded outlet.
1
Your PCB is attached to a metal plate. There are components on the PCB between the PCB and the metal plate.
Very likely there is a component that is just a little too tall. As long as the screw isn't completely tight, there's a tiny gap between the component and the plate. If you tighten the screw really tight, the component touches the plate and causes a ...
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