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It is OK to use one ground with the voltage regulator circuit as you have shown. In fact, I don’t think it will work if the 12V source and regulator are referenced to separate grounds.
Can power and ground be connected together?
The best method is to connect the two grounds at exactly one point. This is called the star point. Make sure the ground connection from your power board has low resistance (thick wire) to keep the voltage drop over it small.
Can 12V and 5V share a ground?
Absolutely not. Not only is it not dangerous, it’s safer than not connecting grounds together. Since now the whole circuit has a single baseline voltage to reference everything from 12V is 12V and 5V is 5V.
Can neutral and ground wires be connected together?
Whenever you have an auxiliary panel the neutral and ground should not be tied together because the ground wire becomes a parallel path for current with the neutral wire (any current going through the neutral wire will be shared with the ground wire because they have the same connections at both ends).
What happens if not grounded?
If your outlets and electrical box are not properly grounded, appliances and electronics you are using could end up passing excess current through you, using your body as a means to complete the path to the negatively charged ground. In other words, you could be shocked or electrocuted.
High “power” circuits (as opposed to high voltage) tend to have higher current, higher currents are subject to inductive noise spikes. A noise spike of 2-3V might not have any consequence to a 100V circuit, but that is enough to the change the input on an Arduino. A 10V spike, no matter how short can damage a 3.3V input.
What are the three types of ground in a high voltage system?
Many high voltage systems require extreme accuracy, if the programming signal shares a ground with a power ground an error will be introduced. There are typically three types of ground in a high voltage power supply system; the input power source, the low voltage control and monitoring circuits, and the high voltage return.
Can a grounding conductor be borrowed from another circuit?
So if your area has adopted NEC 2014, you can connect a grounding conductor to the grounding conductor from another branch circuit, as long as both circuits originate from the same panel. Depending on what code has been adopted in your area, you may not be able to borrow the grounding conductor from another circuit.
What are the three types of grounding in a power supply?
There are typically three types of ground in a high voltage power supply system; the input power source, the low voltage control and monitoring circuits, and the high voltage return. These three grounds should have their own independent, dedicated current return paths and should be connected using a “star” grounding technique.