Here's a fun signal processing challenge that we invented during a hiking trip through cornwall 10 years ago:
At Lands End, there's the "Lighthouse" which emits an acoustic beacon consisting of regular loud beeps, presumably bc. this can be caught by sailors even in thick fog. Now, the question that occurred to us immediately: How far away from Land's End can you capture this sound with a microphone by using very steep FFT filters and convolution methods? Miles? Further? #hamradio #electronics
I have both the thick ARRL and RSGB radio handbooks. And they both contain lots of formulas where they adapt the calculation to feeds, miles etc. And with yards and stones (UK) things won't get better.
However, I knew most of the formulas in these books, but with SI units. Must simpler. And if there were "weird" constants, it was because of physical constants like speed of light. Not arbitrary factors.
I only could think "How stubborn and reform-resistant must be a nation to not adapt to something clearly better"
Does anyone know of an Arduino-compatible board with two slave-capable I2C ports? Ideally 5V but I can make 3.3V work.
I'm trying to emulate two display controllers, sniff the output, and combine it on a single graphics VFD. #arduino#electronics
#Malaysia has become a hotspot for global #electronics & #semiconductor investment, with country's electrical & electronics export seeing a sharp increase of 54.2%. However, the surge of electronics & semiconductor investment in Malaysia is sharply contrasted with low #unionization; only 6% of all #Malaysian#workers are #unionized, the majority in the public sector.
Throwing out all the old stuff. 709 and 741 opamps bought before they knew about static electricity. But in ceramic and metal cases! You just don't see that kind of thing any more. Not for a really, really long time.
@ericphelps Static, I remember it well. We'd spray fabric softener on the radio station carpet back in the 70’s, because touching automation equipment with any kind of static buildup would cause it to reboot, jump, freeze, or some other calamity.
That and "massaging the chips" because they were all in sockets (re: static) and their legs/contact got corroded due to the giant furnace of a power supply under the CPU boards.
“This is a self-contained low-power computer with its own display and keyboard that you can program in uLisp, a version of the high-level language Lisp for microcontrollers”
Time to take a stab at this thing. The LM338k regulator has finally failed on this WhiteStar platform driver board. I wish there was a switching PSU replacement for it like there is for the LM323K used in WPC games.
The regulator is at the upper left corner with a huge heat sink. It runs quite hot!
@root42 From what I own, only one platform uses it and it has one of them. It produces 5v, 5A in these games and drives everything from the CPU to external devices that run on 5 volts.