compensating phase shift

Started by alb in sci.electronics.design2 hours ago 17 replies

Hi everyone, I'm attempting to compensate a pole of the plant due to it's vicinity to my desired working point. Let's say that my ideal closed...

Hi everyone, I'm attempting to compensate a pole of the plant due to it's vicinity to my desired working point. Let's say that my ideal closed loop cutoff is f and my plant has nearly a 180 phase shift at around f. The foreseen controller is a PI but I cannot reach the required cutoff due to the vicinity to the 180 phase shift (I suppose). The best I can get is 0.9*f, with a gain margin ...


74HC74 pulse shaping

Started by bitrex in sci.electronics.design2 hours ago 85 replies

What's the "canonical" way to use a 74HC74 D flip flop to "square up" pulses a la a Schmitt trigger? I feel like this should be possible but...

What's the "canonical" way to use a 74HC74 D flip flop to "square up" pulses a la a Schmitt trigger? I feel like this should be possible but I'm having trouble finding example circuits that aren't divide by two...


Windows rename

Started by John Larkin in sci.electronics.design2 hours ago 56 replies

I have a folder with many subdirectories of the form 99D100 99D102 etc and I want to rename them all as Z100 Z102 etc. I've...

I have a folder with many subdirectories of the form 99D100 99D102 etc and I want to rename them all as Z100 Z102 etc. I've tried variations of the command-line REN command. It renames files, with wild cards, but I can't make it rename directories. Any suggestions? There are around 100 to rename, so I guess I could do them one at a time. -- John Larkin ...


transfering backup media

Started by legg in sci.electronics.design2 hours ago 8 replies

If you back up a PC to a removable drive, can the backup 'folder' on that removable media be copied to another drive and still be used...

If you back up a PC to a removable drive, can the backup 'folder' on that removable media be copied to another drive and still be used to 'restore' the original PC? This using generic W7 back-up and restore program.... At the moment, there is no secure physical location to store the original removable backup media - carrying other needed files 'on the road'. I'd like to place the backup fi...


Mechanical resonances in PID l(oops)

Started by George Herold in sci.electronics.design3 hours ago

The oops is for stepping on Al's PI thread. Here (again) is the response, of my piezo/ aluminum flexure mount/ grating. (I'll post a pic,...

The oops is for stepping on Al's PI thread. Here (again) is the response, of my piezo/ aluminum flexure mount/ grating. (I'll post a pic, Thursday) https://www.dropbox.com/s/zftwx11a36zkypp/PIEZO-RESP.BMP?dl=0 The peak may be a little higher than shown, I cut the input by a factor of 2 for the highest peaks.. and the peak was clipping again. (If I drive the piezo too far the l...


OT: Hillary: Health Concerns are Legitimate - Top Doctor

Started by Julian Barnes in sci.electronics.design3 hours ago 70 replies

MD suspects Hillary has suffered multiple blood clots and strokes; calls for full release of health...

MD suspects Hillary has suffered multiple blood clots and strokes; calls for full release of health records: https://youtu.be/Ift6VhoBL08 Conclusion: she's a wreck.


airships

Started by John Larkin in sci.electronics.design3 hours ago 31 replies

http://www.bbc.com/news/uk-england-beds-bucks-herts-37174417 Why do people keep building these things? -- John Larkin ...

http://www.bbc.com/news/uk-england-beds-bucks-herts-37174417 Why do people keep building these things? -- John Larkin Highland Technology, Inc lunatic fringe electronics


this girl is good

Started by John Larkin in sci.electronics.design3 hours ago 19 replies

http://video.foxnews.com/v/5082684192001/flag-football-star-wows-with-new-trick-shot-video/?#sp= show-clips NFL? -- John Larkin ...

http://video.foxnews.com/v/5082684192001/flag-football-star-wows-with-new-trick-shot-video/?#sp= show-clips NFL? -- John Larkin Highland Technology, Inc lunatic fringe electronics


Anyone Using Diptrace?

Started by Jim Thompson in sci.electronics.design3 hours ago

I've had a project inquiry with the requirement to provide documentation in Diptrace format. Anyone here using...

I've had a project inquiry with the requirement to provide documentation in Diptrace format. Anyone here using it? Comments? Thanks! ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | ...


google earth is weird

Started by John Larkin in sci.electronics.design3 hours ago 1 reply

https://dl.dropboxusercontent.com/u/53724080/SF/650P/Airplane.jpg Why is there an airplane sticking out from this building? And why is there...

https://dl.dropboxusercontent.com/u/53724080/SF/650P/Airplane.jpg Why is there an airplane sticking out from this building? And why is there a tree that doesn't exist? -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


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