@NickAlexeev yes, it does indeed. helps transitioning from those other ones into Altium. The place I interned at indeed had just transitioned from an old version of OrCAD to Altium and was building up/transferring library of parts. Altium also supported spreadsheet/database style symbol/component libraries which was handy
Collecting options at this point. Mainly thought about car battery being convenient because I can use the same rail as the backup for wifi router, fritz box and switch
I am getting some options and ideas on what is possible, like I think maybe I can use the same 12V backup rail for some emergency lighting LEDs in the stairs area
Me neither, but I keep up with what happens, since everything electronics either is my business, or could be
Depends on the sub type.
Prolonged submersion Subs generally have better, high power lighting on normal run, having the switchover for silent running, if that means turning off the main drive also generating the kWs/MWs needed to run everything
And of course, most Navy subs are that, just that when they are in the docks, they generally try to avoid having it run main drive systems :-)
@abdullahkahraman usually the images on the website are just examples, and the datasheet often just shows one variant and then lists ways this could be different. look at the datasheet for a list of variations on it and what htose provide
@abdullahkahraman The data apply to all of the potentiometers of that series, and are correct (electrically) whether you have one, or two, or a half dozen ganged together on one knob. The datasheet also mentions that the units can be ganged and can be ordered ganged, so they are correct. If a bit misleading on first glance.
@PlasmaHH haha, anything that you could name in real world has related physics. a LASER is just something that produces photons in a very narrow beam. That's it. A SASER is the same thing, with sound.
@tuskiomi Electrons jump energy levels two different ways, stimulated and spontaneous emission. Only stimulated emission is stimulated emission. Spontaneous emission is a different process.
And the light coming from a fire is almost entirely spontaneous emission.
@tuskiomi They would be wrong if they said that "fire is SER of photons."
@ThePhoton I would like to debate, but I don't know enough on black body radiation mechanics to continue. I've read a teency bit of a textbook (physics of light and optics, 2015 optics.byu.edu/prevtext/byuoptics13.pdf), which seems to favor it being stimulated (13.4), as opposed to spontaneous. Take it with a grain of salt, this is where my physics gets hazy. book link: optics.byu.edu/textbook.aspx
@tuskiomi What part do you think links the two? In the first paragraphs they talk about the black body absorbing radiation and then emitting radiation. But these are two separate processes, with an indeterminate time passing between them. The emitted radiation is not coherent with the absorbed radiation.
In stimulated emission, the incoming photon interacts with the electron but is not absorbed. The interaction triggers the electron to drop energy levels and emit a photon, which is in phase with the initial photon. The initial photon is never absorbed in this process.
The Einstein stuff is a bit tricky and I would have to go back and re-read to remember the details, but the basics are that because of reasons, the likelihood of a certain material in a certain excitation state undergoing spontaneous emission and undergoing stimulated emission (when a stimulus photon arrives) are related to each other.
But that doesn't mean that stimulated and spontaneous emissions are the same thing.
Hmm, like I said, grain of salt. I just read that it was equilibrium, and both types of ratiation happend, spontaneous as a postulate, and stimulated as a continuous function.
But I don't see how you get from this to "fire is stimulated emission". If you can point out what parts made you think that, I might be able to explain what you got wrong.
Well, it doesn't explicitly, but it says that it was proposed so by Einstein: "Since the radiation of a blackbody is in thermal equilibrium with the material, Einstein postulated that the field stimulates electron transitions between the states. "
Imagine you have a candle in a room with the walls painted black and kept at 0 C.
The walls will be emitting (near) blackbody radiation characteristic of 0 C.
But the flame will be emitting (near) blackbody radiation with characteristic of around, say 1500 C.
The emissions from the walls, which will form the field around the flame will be mostly infrared. Any stimulated emission from this stimulus would also be infrared. But the candle flame actually emits yellow, not infrared.
So you know that yellow light is not coming from stimulated emission, it's coming from spontaneous emission.
Not that the candle doesn't also emit infrared.
But it's whole output spectrum is shifted blue relative to the spectrum of the radiation coming to it from outside.
no indications that the part isn't working. i have a nice commercial programmer for these sorts of things and it programmed and verified fine. ALE is toggling once i take it out of reset so i believe the device is running
psen# is not toggling so i believe it is running internally
@ThePhoton Hey :) I finally got my full adder working: imgur.com/a/NL5dh (Still working on my cable management :P) Wanted to thanks again for your help here in chat.
How would one go about using a 12 V DC power source to power something which needs 4.5 V DC using resistors? Is there a way to determine how much adding a resistor would drop the voltage?
anyone here used Lattice FPGAs and have worked out how to add the global Power Up Reset module?
specifically the ICE40 FPGA, and i'm using the IceCube2 and Synplify Pro Synthesis (and A-HDL for simulation..)
or otherwise, how do you guys implement a system-wide reset signal on FPGA start-up to ensure all states and registers are initialized to a known value?
@ThePhoton after a huge amount of googling, that seems to be the thing i should do
I am having "intended" results with A-HDL simulation, but when I flash it to my FPGA dev stick it seems like only half or less of the functionality is there. The simple FIFO buffer's "empty" LED is not lighting, yet my LED "blink" module is definitely still operating correctly. sigh
so i'm thinking it's a reset or state that is simulating properly but in hardware isn't firing