- #1
Constantinos
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Anyone knows any good online lectures on Signals & Systems theory?
Signals & Systems Lectures Question
AI Thread Summary
Several users are seeking online lectures on Signals & Systems theory. Various resources are shared, including a video on Fourier transforms and a "one on one" style lecture. Additional links to NPTEL courses on the subject are provided, enhancing the learning options available. The discussion highlights the community's willingness to share educational materials. Overall, participants express gratitude for the shared resources.
Hi all
I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker.
I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test.
I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old things that I keep and now reviving. Old things need to work to see the beauty. Here's what I've done so far.
Two views of the gadgets shelves and my small work space:
Here's a close up look at the meters, gauges and other measuring things:
This is what I think of as surface-mount electrical components and wiring. The components are very old and shows how...
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