berkeman's latest activity
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Here is an LTspice model for the uA/LM709. At the end it defines the transistors used as all having the same specifications. * LM709... -
berkeman replied to the thread I thought it was only Amazon that sold unsafe junk.Yes, we call them "suicide cords" or "widowmakers" because they don't obey safe practices of keeping AC Mains live wire connections...
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berkeman replied to the thread I thought it was only Amazon that sold unsafe junk.Wow, that's not good. Are there any certification markings on the box or the cord? Anything like UL or similar?
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berkeman reacted to Averagesupernova's post in the thread I thought it was only Amazon that sold unsafe junk with
Wow.
I grabbed an under cabinet LED light today at a big box store. Nothing special. 18 inches in length and made to plug several lights... -
berkeman replied to the thread General principle of turbomachinery: true also for rocket turbopumps?.Using AI as a technical reference at PF is not allowed. Thread is done.
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berkeman reacted to Dale's post in the thread Undergrad Reference frames, center of rotation, etc with
Like.
Excellent, except that you will want those as vectors, not just the magnitudes. So for the rotating $$v_l(t)=(-\omega l \sin(\omega... -
berkeman replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.@haruspex -- minute hand or hour hand as stationary?
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berkeman replied to the thread uA709 op amp compensation.So you have the opamp schematic entered into SPICE and are looking for the transistor model data?
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berkeman reacted to Choppy's post in the thread Admissions What are some of the questions asked for a medical physics residency interview? with
Informative.
It's going to vary from program to program for sure. Technically anything that's part of the core curriculum from a CAMPEP graduate... -
berkeman reacted to jbriggs444's post in the thread Undergrad Reference frames, center of rotation, etc with Like.
That is not a substantive response. Since you are not interested in a genuine discussion, I am out. Unattributed straw men devoid of...
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https://www.c3controls.com/white-paper/what-are-the-advantages-and-disadvantages-of-programmable-relay-controllers?srsltid=AfmBOorMhoyDMy...
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berkeman reacted to harborsparrow's post in the thread Who is responsible for the software when AI takes over programming? with Like.
Peer code reviews are highly effective IF there is no negative consequence for anyone when faults are detected. The problem is, the...
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berkeman replied to the thread High School Mousetrap Car Energy efficiency.What are the rules for this competition? Are you talking about mousetrap cars that use an extended lever arm and string wrapped around...
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berkeman reacted to Baluncore's post in the thread Utility Scale PV Arrays Located near HV Transmission Lines: Minimum Allowable Distance with
Haha.
https://cms.eirgrid.ie/sites/default/files/publications/Solar-Farm-Clearances-Report-Rev-A.PDF See table 1, on page 1. Since with 3PH... -
Thank you again for speaking up, I appreciate it. I'm stepping back from posting. My questions sit at the edge of wave mechanics and...
