Just watched the latest episode last night... S16:E4, discussing the failed Lion flight, as well as the near-failure flight of the same bird the evening before.
Dan - Owner
http://www.Hi-TecDesigns.com
Recently came across this ~370-page PhD thesis covering the history of the quartz crystal oscillator. Given its presence in nearly all things electronic these days, I thought some here might like to take a gander...
This is a continuation of an older thread here:
https://www.eng-tips.com/viewthread.cfm?qid=459781
Just came across this Twitter feed with some interesting analysis tidbits on the towers and the resulting fire:
https://twitter.com/TubeTimeUS/status/1306359385656946688
Dan - Owner...
Anyone heard any technical details on the cause yet?
https://www.nbcconnecticut.com/news/local/sikorsky-reacts-to-helicopter-crash-that-killed-kobe-bryant-four-others/2214898/
Dan - Owner
http://www.Hi-TecDesigns.com
Looking for book suggestions on IC layout (mostly digital, but analog is still good info to have in the back pocket). Specifically looking for details about various cell types, common (old) and cutting edge processing techniques/method, etc.
My current to-get list includes:
The Art of Analog...
And I'll be flying SW in a few months...
https://nypost.com/2018/05/02/southwest-airlines-flight-makes-emergency-landing-due-to-broken-window/
Dan - Owner
http://www.Hi-TecDesigns.com
Looking for a P-channel FET in a SOT-23 package that has the drain and source pins swapped from the industry standard. Does not need to handle much power or voltage (5V @ 1mA).
I know such a creature exists, but finding one when you need it is (so far) impossible...
Dan - Owner...
This forum is about as good as any...
Looking for an "inexpensive" ultrasonic knife... anything in the $200ish range? Best I've found so far is a model from Honda that's >$400 (Amazon, eBay), etc. I don't expect to receive a lot of benefit from a $3k+ model, and I'd hate to lose $400+ if/when...
Not an engineering disaster, per se, but I imagine the readers of this particular forum would have more specific insight...
A discussion group I'm part of that deals in CNC machining recently had a post (with pics) of an accident. It seems a machinist decided to poke his head into the working...
I've come across an IC package type I can't identify, so help is appreciated. It's similar to a TSSOP-8, but the overall dimensions are smaller (3.1x2.0mm package). The relevant dimensions (in millimeters) are roughly:
Width: 2.2 (3.1 with pins, toe to toe)
Length: 2.0
Height: 0.7
Pitch: 0.5...
I'm looking at the plate on a switch and I see multiple ratings on the front:
1/4 H.P. 120-240 V.A.C.
3A-240 V.A.C.
13A-120 V.A.C. (H)
On the back, a stamp reads:
6A-120 V.A.C.
I'm interested in why the multiple 120VAC ratings for the same item, but I'm mostly interested in what the 'H' stands...
The wife's car (Nissan Cube) has had issues from practically day one... but this particular thread is about brakes.
At some point in the past, the steering wheel took on a real shudder during braking... fine, warped rotors. But why did they warp? While doing some maintenance work (read...
Anyone have experience using 3D laser scanner heads, i.e., galvos with dynamic focusing capabilities (not just F-theta lenses)? Specifically, I have questions on the controlling software you use...
Let me know, I'd love a few minutes to pick your brain.
Dan - Owner
http://www.Hi-TecDesigns.com
This seems like the best forum for this...
Looking for a (preferably US) supplier of near-infrared blocking plastic, particularly in the 1-1.1um range. So far, everything I've found has been listed as a specialized item for blocking of fiber/YAG laser beams... which is fine, but I would prefer...
Not a molding resin question, per se, but I figured you guys would know, if anyone...
I'm looking for an inexpensive source for a thin rubber mat that has a sticky feel to one or both sides (these are usually used to hold down thin/light objects during light machining operations, such as rotary...
I hope this is the best forum... doesn't seem to get too much activity.
I'm looking for the most abrasion-resistant steel alloy I can get my hands on for a reasonable price. Suggestions?
Some helpful info... the application will involve close proximity to hand-held high-speed steel (HSS)...
Since I'm in the D.C./Baltimore area, I'm in an area with arguably the highest concentration of jobs that require a security clearance of one level or another. The problem is, if you have never held a clearance, getting into a job that is willing to pay for one is nigh impossible... there are...
A number of fellow associates are having issues with warping of colored acrylics, and we'd like to narrow down the exact cause (and solution). It is believed humidity is the issue, but unfortunately the effect does not appear to be transient.
The sheets are 4'x8' in size, and I believe are...
Finally the government is taking steps to normalize the ratings on LED fixtures. See here:
http://www.lightingfacts.com/
An example label:
Dan - Owner
http://www.Hi-TecDesigns.com
Had to include the smirk in the title considering the number of posts we've had in the past about eco-friendly bulbs (i.e., LEDs and CFLs) from crackpots, tree huggers without facts, etc. I figured this would be easy enough to point to if any more show up.
It's a short little article about...
