First post for this account. I'm a beginner at electronics. Thanks for your patience.
I just bought a PC-based logic analyzer, the Logic 16 by Saleae, which describes not connecting it to a "device under test" w/o the device being isolated from MAINS power. I'm thinking they mean that the device needs to be isolated from ground isolation to prevent a ground loop w/ the PC powering the Logic16. Is this correct?
What I'm mostly testing are breadboard prototypes powered by a DC bench power supply with variable voltage and amperage. I've tried using a multimeter to measure resistance between the circuit leads and the ground plug, and there is no path. Does this mean that the DC bench power supply itself provides power isolated from ground to my breadboard prototypes?
The laptop is powered using a somewhat similar setup, but with a 19V DC power brick. Same testing applied. My guess is that while connected to the power brick, that the laptop is isolated as well?
What's an example of a modern device with a digital circuit powered by a supply w/o ground isolation that I would have to be wary about testing?
Thanks in advance!
I just bought a PC-based logic analyzer, the Logic 16 by Saleae, which describes not connecting it to a "device under test" w/o the device being isolated from MAINS power. I'm thinking they mean that the device needs to be isolated from ground isolation to prevent a ground loop w/ the PC powering the Logic16. Is this correct?
What I'm mostly testing are breadboard prototypes powered by a DC bench power supply with variable voltage and amperage. I've tried using a multimeter to measure resistance between the circuit leads and the ground plug, and there is no path. Does this mean that the DC bench power supply itself provides power isolated from ground to my breadboard prototypes?
The laptop is powered using a somewhat similar setup, but with a 19V DC power brick. Same testing applied. My guess is that while connected to the power brick, that the laptop is isolated as well?
What's an example of a modern device with a digital circuit powered by a supply w/o ground isolation that I would have to be wary about testing?
Thanks in advance!