You are correct, the reported 700watts I saw was for 1h and 25min, not 1 hour.
Still something very wrong about that figure. That's a higher
power output figure for a longer period, which common sense (and your aching legs) tells you is not the way that human endurance works. I think someone's quoted you figures for peak power output during a 1h 25m race, which I can believe, for an all out sprint in the final 200 metres of a race.
It was a fusion device, not fission. The name on the side of the unit said "Mister Fusion".
That was the version of the car that came back from 2015. The 1985 version ran on plutonium: that's why Doc had to make a bargain with the terrorists!
You are correct, the reported 700watts I saw was for 1h and 25min, not 1 hour.
Still something very wrong about that figure. That's a higher power output figure for a longer period, which common sense (and your aching legs) tells you is not the way that human endurance works. I think someone's quoted you figures for peak power output during a 1h 25m race, which I can believe, for an all out sprint in the final 200 metres of a race.
Hmmmm, that would be average 495watts/hour at an hour and 25 minutes, measured with Powertap P1 Powermeter Pedals which have a +/- 2% error rating. I'm going to have to find the original supplied log posting as I am nowhere near this figure (my record when my back was better was 225 watts at 1h, 40min, however, that was surplus wattage measured coming from a treadmill motor linked to a stationary exercise bike by a rubber belt as a generator & halogen lamps as a load). I know sustaining a perfect 408 watts for 1 hour straight is considered a typical minimum capability for TDF grade racers.
NOTE: This is an old image before the control board circuitry and PC control logging, but, you get the idea...
Hmmmm, that would be average 495watts/hour at an hour and 25 minutes, ...
There's your problem. I don't think you understand what Watts are, which I'd kind of assumed you did given where you're posting, which consequently is why this was getting so confusing.
Watts are the
rate of expenditure of energy, also known as power; Watts = Joules per second, so Watts/hour is a meaningless unit (in this context). Watts are a measure of instantaneous energy expenditure, they don't accumulate over time, which seems to be your understanding from your roughly equating 700W over 1h 25m with 500W over 1h. A power of 700W expended over 1h 25m is a total energy expenditure of 3.57 megajoules, 500W over 1h is 1.8 MJ.
I was going to say a composite video ADC, but there are many. For some reason, last time I looked, it seemed there was only a single such device on the market (which I could hardly believe, but I couldn't find any others).
VCCap = voltage controlled capacitance
I'll give you something even better: Digi-Key -> ICs -> Specialized ICs -> Type column: Digital Capacitor. Unfortunately the IXYS datasheets are secret and all of the other manufacturers' parts are obsolete.
There's also an Electronically Trimmable Capacitor entry, though I didn't look at those.
(edited because the forum doesn't support Unicode
)
I'll put a second vote in for a cpld or self booting fpga with on board flash with lower pin count then what is available. Lots of glue logic and other simple stuff could be done with a device with 16 io but more cells. I guess that kind of product only interests hoists like me.
A random number generator which matches the results of the next lottery draw here in Canada.
A fully complementary pair for the 6L6 vacuum tube.
And while we are at it, a ferrite power material with Bsat of 1.5 Tesla, and usable to at least 100Khz.
A fully complementary pair for the 6L6 vacuum tube.
I wouldn't want to be within a couple of hundred miles of a compliment to a 6L6 tube - if the envelope cracks and air gets at the antimatter electrodes, it will make the Hiroshima bomb look like a firecracker.
here's hoping
A reasonably priced portable multimeter (capable of uA measurement) that contains an inbuilt datalogger for subsequent analysis.
A fully complementary pair for the 6L6 vacuum tube.
I wouldn't want to be within a couple of hundred miles of a compliment to a 6L6 tube - if the envelope cracks and air gets at the antimatter electrodes, it will make the Hiroshima bomb look like a firecracker.
What's wrong with "hello 6L6, you're looking smart today!"?
A full complement may well be dangerous, as you say.
A reasonably priced portable multimeter (capable of uA measurement) that contains an inbuilt datalogger for subsequent analysis.
Fluke 289? Depends on your definition of 'reasonably priced', I guess. Mine cost much less than the value of the job I needed it for, so it definitely met that criterion.
A reasonably priced portable multimeter (capable of uA measurement) that contains an inbuilt datalogger for subsequent analysis.
Fluke 289? Depends on your definition of 'reasonably priced', I guess. Mine cost much less than the value of the job I needed it for, so it definitely met that criterion.
That looks nice, but expensive by my definition of reasonably priced... but I concede my definition won't apply to all. <£300 is my definition.
1. A variety of monolithic matched transistor arrays.
2. Monolithic cross coupled quads - these are used for when you need real precision.
3. LCC and PLCC (J-*leaded*) parts including microcontrollers, programmable logic, and memory - these can be surface mounted or placed in sockets for through hole designs.
4. CdS cells - Is there really a problem with hermetically sealed CdS?
Multimeter with a voice output so you don't have to look at the display.
Alternatively a multimeter with a remote display like the one on the "Google glass" glasses.
You know, this is actually a pretty good idea.
With the freakingly small components, in which one struggles to exactly position a needle pointed probe into whatever is exposed in a leadless component, I have had someone helping me reading out out loud the DMM readings.
Multimeter with a voice output so you don't have to look at the display.
Alternatively a multimeter with a remote display like the one on the "Google glass" glasses.
Wouldn't be difficult to create, plenty of meters out there with data outputs...
Not a component but a DSO that has similar screen resolution to a good tablet and a 16, or dare I say, a 24 bit D/A. No, I don't need one, I just want one. Today's DSO screens are the equivalent of old timey CGA screens, like looking at the world through flywire.
Any multimeter that has a serial out should be easy to hook up to a text to speech app.
You just need some way to tell it when to sample, voice would be best.
I'm surprised that none of the handheld meters have that, it sounds as if it would likely be easy to implement.
Similarly with the AVR Transistor tester. It would be cool to have it be able to tell you verbally what the component was.
Quote from: CJay on Today at 11:41:22>Quote from: e100 on Today at 09:28:50Multimeter with a voice output so you don't have to look at the display.
Alternatively a multimeter with a remote display like the one on the "Google glass" glasses.
Wouldn't be difficult to create, plenty of meters out there with data outputs...
My Tandy/Radio Shack MICRONTA meter from the 1980/90s? had a voice synth for reading out the values via special probes with a voice switch to activate it (similar to the Fluke 1507/1587 switch probes)
Worked great till the crappy cable with microscopic breakable wires died,
I tried to bodge it to work, and gave up
as I just got a Fluke 87 and 8060A and was busy playing with those
and forgot about the Tandy meter lol.
It wasn't a bad meter either, had glass -NRC- fuse fitted (lol) and did work with standard multimeter leads.
I'm a bit more electro savvy nowadays, if it surfaces I will diagnose and repair the sucker and get it talking again
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UPDATE EDIT: EEVblog member a few posts further down has located a video with the exact meter I mentioned, thanks
Regarding voice output for multimeters, is there enough physical/electrical/data commonality between multimeter data outputs to be able to make a generic product, or would it need to be customised for each model? My Bryman multimeter has an optical interface but I don't know how common or interchangeable this is.
Kickstarter anyone? I would buy one for sure.
Any multimeter that has a serial out should be easy to hook up to a text to speech app.
You just need some way to tell it when to sample, voice would be best.
I'm surprised that none of the handheld meters have that, it sounds as if it would likely be easy to implement.
Depends how you use the meter, if it's got a hold mode then the changing data can trigger it, if you don't want hold mode then some kind of 'RF' button, just a pulse of 433MHz or even one of those dodgy little 'selfie' buttons on the probe, plenty of options to explore