Arduino and a relay to turn the pi off to conserve energy
This is exactly my idea if need be, but I can get 500wh/day of energy at the very least (winter snow on new years). The most I'd ever need to store is ~90wh (15h @500ma).
The arduino fits this role perfectly. I have a few years experience building remote data collection sensors and very little computation ability is required You don't even need to do calibration, just record raw data. I was doing this on a TRS-80 100 in the 1980's with no problem collecting data (about 2 dozen sensors) over a few months time. Where the rpi would come in handy is its ease of use of large storage space. I think you can do that with the arduino also, but have not tried.
One of the things I have planed to do with my rpi is to set up a remote station on a tall mountain about 12km from my house. I could set up a camera and talk to the whole thing over an xbee rs-232 tcp link (ppp) at 28.8kbaud. With a small solar panel this would run indefinitely and provide me with weather data and a view of the whole area.
There used to be a company called rapaport I believe who were developing a chip called the Kilocore. The point was that if you were decoding images, 1024 slower cores would be as fast, yet significantly less energy hungry than one core 1024x faster.
CMOS technology, is static meaning that there is no current flow through a gate when it is on or off. Current only flows while the transistor is transitioning states. P = I x V and as I (current) increases, so does power. All 'digital' circuits are actually analog and you can show that I is proportional to frequency squared. Instead of having a power (^) increase in energy use, you have a linear relation.
I've worked on a few systems and written a lot of boot/firmware. This is not a difficult thing to do. A few large systems I've worked on could be brought up to an operational state in 50ms. Not everything would work, but you have hardware limitations and BIT that can take seconds. Most f the time, you do not need full capability in 50ms, but just enough where it looks like you do. The time between keystrokes is an eternity while running at 1GHz, especially when executing.5-1 instruction per clock cycle. Most boot code is a few pages, or dozens, at the most and largely involves copying/decompression out of ROM/Flash. If you are clever enough, you can do this in the background of reduced capability functioning system and transition to the full system once everything has loaded.
I had a couple of friends in undergrad physics who went to grad school to study plasma physics to work on this. Both dropped out after about 2 years citing that thy couldn't wait five years and went on to get phds in solid state (more money). This was 2 years ago.
haha. There a lot of them. On a related note, I did see an article in National Geographic maybe 15 years ago that had a large section devoted to him. I was just in the right place at the right time and got to work with many of the top experts on Mars and PIs for a couple of missions.
Well, I've worked on autonomous cars, starting on the platooning problem, and later lateral guidance (steering). I then worked on energy management in aircraft (altitude which is very motor dependent (and also have a patent in this area)). Another problem involving motors is the stacking of aircraft which I spent about a year developing models for. The motors were simulated as 3rd order models, we found that this is all that was necessary. So yeah. Any questions? And also very familiar with gyros et al and 6dof models, gps simulation/real life nmea83 decode and also wgs84 and very experienced with many ARINC standards, though mostly 653 and 429.
Simulations is vitally important in spacecraft systems where you don't have the 'robot' until sometimes years after you've designed it.
A long time ago, I used to develop science instruments for geologists who did field trips like that to understand Mars. Do you remember if one was from New Zealand and named Nick (don't remember his last name)?
Depending on where you live, the Gobi Desert can pretty far away too. And while I do like to travel to distant and exotic places, it would personally take me a few years to execute such a trip (funds et al.).
There is plenty of He4 on Earth. There are, however, no fusion reactors. Why not spend the money building fusion reactor first then use all of the profits to build a moon mining mission. I'm sure terrestrial supplies would last that long given that it takes at least ten years to build any sort of nuclear plant.
But astronaut will be the only job in the future. Robots will take all of our other jobs here on Earth. Only humans can explore and do science in person. Because it's what we do. Or something.
That's interesting. I never heard of this guy before, but independently came to a similar conclusion when I was studying the dumbing down of society. That video is the first time I've heard someone else make the connection. Thanks
I was here pre-UID (back when slashdotting was a common occurrence). At the time many were railing against them and voted never to get one. I held out until the 5 year meetup and lost it soon after. I'm on my second now. It's interesting that cultural change.
Slashdot Mirror
Arduino and a relay to turn the pi off to conserve energy
This is exactly my idea if need be, but I can get 500wh/day of energy at the very least (winter snow on new years). The most I'd ever need to store is ~90wh (15h @500ma).
Most people are not good drivers. I know I'm not and I've never even been involved with or caused an accident.
One of the things I have planed to do with my rpi is to set up a remote station on a tall mountain about 12km from my house. I could set up a camera and talk to the whole thing over an xbee rs-232 tcp link (ppp) at 28.8kbaud. With a small solar panel this would run indefinitely and provide me with weather data and a view of the whole area.
https://en.wikipedia.org/wiki/...
It appears to be dead, but a very interesting technology.
CMOS technology, is static meaning that there is no current flow through a gate when it is on or off. Current only flows while the transistor is transitioning states. P = I x V and as I (current) increases, so does power. All 'digital' circuits are actually analog and you can show that I is proportional to frequency squared. Instead of having a power (^) increase in energy use, you have a linear relation.
Good video!
faster boot times
I've worked on a few systems and written a lot of boot/firmware. This is not a difficult thing to do. A few large systems I've worked on could be brought up to an operational state in 50ms. Not everything would work, but you have hardware limitations and BIT that can take seconds. Most f the time, you do not need full capability in 50ms, but just enough where it looks like you do. The time between keystrokes is an eternity while running at 1GHz, especially when executing .5-1 instruction per clock cycle. Most boot code is a few pages, or dozens, at the most and largely involves copying/decompression out of ROM/Flash. If you are clever enough, you can do this in the background of reduced capability functioning system and transition to the full system once everything has loaded.
I had a couple of friends in undergrad physics who went to grad school to study plasma physics to work on this. Both dropped out after about 2 years citing that thy couldn't wait five years and went on to get phds in solid state (more money). This was 2 years ago.
http://www.academia.edu/783278... wow. he is old now. I knew him as a postdoc. Getting old sucks ;)
Found him..Nick Lancaster
haha. There a lot of them. On a related note, I did see an article in National Geographic maybe 15 years ago that had a large section devoted to him. I was just in the right place at the right time and got to work with many of the top experts on Mars and PIs for a couple of missions.
Ummmm.... anything involving a motor?
Well, I've worked on autonomous cars, starting on the platooning problem, and later lateral guidance (steering). I then worked on energy management in aircraft (altitude which is very motor dependent (and also have a patent in this area)). Another problem involving motors is the stacking of aircraft which I spent about a year developing models for. The motors were simulated as 3rd order models, we found that this is all that was necessary. So yeah. Any questions? And also very familiar with gyros et al and 6dof models, gps simulation/real life nmea83 decode and also wgs84 and very experienced with many ARINC standards, though mostly 653 and 429. Simulations is vitally important in spacecraft systems where you don't have the 'robot' until sometimes years after you've designed it.
ran into some geologists
A long time ago, I used to develop science instruments for geologists who did field trips like that to understand Mars. Do you remember if one was from New Zealand and named Nick (don't remember his last name)?
Depending on where you live, the Gobi Desert can pretty far away too. And while I do like to travel to distant and exotic places, it would personally take me a few years to execute such a trip (funds et al.).
to do something useful
Such as....?
collect Helium 4 for fusion reactors
There is plenty of He4 on Earth. There are, however, no fusion reactors. Why not spend the money building fusion reactor first then use all of the profits to build a moon mining mission. I'm sure terrestrial supplies would last that long given that it takes at least ten years to build any sort of nuclear plant.
But astronaut will be the only job in the future. Robots will take all of our other jobs here on Earth. Only humans can explore and do science in person. Because it's what we do. Or something.
? Don't understand.
Steven Pinker received death threats for writing an un PC book.
That's interesting. I never heard of this guy before, but independently came to a similar conclusion when I was studying the dumbing down of society. That video is the first time I've heard someone else make the connection. Thanks
Berke Breathed has that beat by a decade.
Note, this would require 300,000 acres to supply enough calories for the US, or 40% of Rhode Island.
11 million heads of lettuce is 8.894x10^8 calories, or enough to sustain (from a calorie perspective) 1,218 people for one year.
It's kinda a tautology. You could fit 7 billion people in the states of Texas, California and Montana with a population density similar to Seattle.
I was here pre-UID (back when slashdotting was a common occurrence). At the time many were railing against them and voted never to get one. I held out until the 5 year meetup and lost it soon after. I'm on my second now. It's interesting that cultural change.