Corrected: Nobody's ever happy.
Better: Nobody ever is happy.
Now I'm happy.
ak
Better,
"My ambiguity has generated a happiness deficit."
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Corrected: Nobody's ever happy.
Better: Nobody ever is happy.
Now I'm happy.
ak
Sounds like fun to me.a contest of arbitrary grammar and linguistics nit picking.
Sounds like fun to me.
a phanastron oscillator circuit
Hey tcmtech - Please rest assured you're not alone! -- But then considering what became of Goldilocks...Nobodies ever happy. I type lengthy detailed posts and people complain they are too long and then I cut things back and now they're too short.
Bob Carver has you beat by about 30 years... the power supplies on his amplifiers used triacs and SCRs to regulate the rail supplies for the amp boards.Challenge 4. Voltage regulating half bridge rectifier using SCR's.
Make a Constant Voltage output linear power supply/battery charger circuit that uses a center tapped transformer with two SCR's and whatever other circuitry you need to produce a reasonably stable DC voltage over a 10:1 or greater current draw bandwidth from a CT transformer that has at least a ~1.4:1 peak center tap voltage over the averaged DC output. IE, ~12 VDC output from a 24+ VAC center tapped (12 - 0 - 12) or higher source.
No parts limit.
Bob Carver has you beat by about 30 years... the power supplies on his amplifiers used triacs and SCRs to regulate the rail supplies for the amp boards.
i guess that's challenge #3?Damn, that was going to be my next challenge too. Make a hexode or heptode vacuum tube based oscillator or frequency shifting converter of any sort.
At the moment, I'm hard pressed to think of any analog device that can't be replaced with some manner of digital gizmo, other than an amplifier...
Don't see how you'd ever make a bit (0 or 1) any more robust...
from what i've seen following trade magazines for the last 30 years or so, is a lot of people are being taught, not so much the "nuts and volts" of electronics, but more of a "systemic" approach. this means you don't see anybody actually designing an oscillator anymore, when they can code a PIC to do the same thing. where there actually is any experimentation with basic analog circuit elements, they are often bizarre renditions of previous technology that are more of a curiosity than they are useful (and they become a passing fad as well), like "current conveyors" (which are simply, a cascade of current mirrors on a chip). how many people can actually sit down and design an audio amplifier or an op amp circuit (the op amp itself, not only circuits that use them) anymore? how many people can tell the difference between a Colpitts and a Hartley oscillator? what's the difference in switching speed between a transistor that goes in and out of saturation and one that doesn't (and why is one faster than the other)? a lot of the basics aren't getting taught anymore. some of it is because you can dump a bunch of stuff onto a piece of silicon and not have to worry about how it works, and some of it is because they're trying to cram a lot of information into a short time frame, and leave the rest for people that want to specialize (why learn about RF circuits when you are designing digital hardware?)(actually that was a loaded question, and intentionally so).
1.5s duration toggle repeating.Challenge 1. Blinking LEDs the old fasioned way.
555 timer IC or some sort of astable oscillator circuit.
Vacuum tube or tubes.
LED's.
Intended End Function.
Make two, or more, LED's blink alternately/successively at 1 - 2 second intervals using a 555 or similar astable oscillator device/circuit (discrete/IC, solid state or vacuum tube based) and a vacuum tube or several of some kind.
No other parts or design limit.
when that 0 or 1 has to travel through a cable, or through the "ether", how do you know it's a 0, 1, or noise? there's really no such thing as a purely digital system. you have to move bits and bytes around through an analog world. the "hype" about HDMI is that "it's a digital media transport". if it were purely digital, there wouldn't be any limits on HDMI cable length, and the quality control of HDMI cable manufacturing wouldn't be necessary. the facts about HDMI are that yes, it's a digital transport for data, but to get those bits from the disk player to the TV requires the analog characteristics of the cable to be carefully controlled during the fabrication process, or the data won't get to it's destination in any usable form.Don't see how you'd ever make a bit (0 or 1) any more robust...
1.5s duration toggle repeating.
3 parts + 2 LEDs + 2R's
when that 0 or 1 has to travel through a cable, or through the "ether", how do you know it's a 0, 1, or noise? there's really no such thing as a purely digital system. you have to move bits and bytes around through an analog world. the "hype" about HDMI is that "it's a digital media transport". if it were purely digital, there wouldn't be any limits on HDMI cable length, and the quality control of HDMI cable manufacturing wouldn't be necessary. the facts about HDMI are that yes, it's a digital transport for data, but to get those bits from the disk player to the TV requires the analog characteristics of the cable to be carefully controlled during the fabrication process, or the data won't get to it's destination in any usable form.