Re:That's bollocks - Err, No its not....
on
42-Volt Autos
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· Score: 1
How ? what are the mechanical parts that can't be replaced by 12V electrical equivalents that could be replaced by 42V ones ?
Short answer is valves. A 12V system does not have enough 'oomph' to drive a valve up and down fast enough. A 42V system on the other hand does. By using a 42V system you can make engines much more efficient and powerful by dispensing with the whole camshaft, idler and pulley arrangement. Doing this you reduce friction and have more precise control over valve opening and closing times, thereby increasing economy and power.
Don't even *think* about using any kind of mechanical switch or relay. Moving parts suck bigtime and will distort any analogue signal you try to pass through them.
With regards to relays, this statement is simply wrong. A good quality relay is infinitely superior to any electronic switch. For instance, reed relays are available which will switch from DC up to microwave frequencys at useable power levels and have 'on' resistance values which are magnitudes better than an elctronic switch. Bear in mind that a set of relay contacts is essentially just a piece of wire. Very few methods of transmitting analog signals distort less than bits of wire.
Dont believe me? Check this site out and look at some of the specifications:
I remember when 20MB MFM hard drives were kicking about on old IBM XT's and their clones. You could fiddle with some of the settings on the controller card and set them up as RLL drives instead. This used to give you a couple of extra megabytes, a big deal in those days.
I cant remember exactly how we did it now, but I do remember it was different for each controller. You had to load up debug to execute the setup software on the controller board, something like g=c800:5
Some drives took it OK, others just developed bad sectors.
Transparent cases have been with us a while, what would be nice is to have all the other peripherals see-through. Certain caveats about shielding etc would obviously apply, but what about clear mice, keyboards, monitors and even printers?
Other than that, does anyone know how easy it is to keep these things clean?
I live in europe, electromagnetic radiation caused by cellphones does not shut schools. Here in the UK, cell towers are reguarly installed on schools. We dont seem to have a population of adolescents convulsing every time someone decides to ring their mum. As for norway being 'irradiated' by sellafield. I would worry more about the nuclear plants closer to home. Theres a reactor north of varberg in sweden thats a hellava lot closer to norway than sellafield.
Just because you heard it from some soap dodging hippy, does not indicate that its real either...
A byproduct of this is incorrectly routed "bits" falling out of routers connected to the internet. I left a port on our main router unplugged and my server room filled up with bricks, dictionarys and reading lamps....
Plug those ports now!!
I had an old Niva that has this type of russian carb on it, It was a copy of an older deisgn webber with some 'improvements'. I swapped it out with a webber that I got from a scrap yard to sort out the emissions. My one was a 1989 'F' reg, so I have no idea what the newer ones had. I thought about putting the fiat twin cam in it, but after speaking to a few people about the conversion, decided to get a Range rover instead. Bad mistake! Every time I stopped the Range Rover I had to check to see what had fallen off... The Lada might have been agricultual, but it never let me down.
They actually had these on display at the Electronica show in Munich this year. The effect is impressive and works well. The horizontal resolution is fairly low and if you move past the display you get this wierd 'popping' image. You need to stay stationary for the best effect. I got the impression that there was some type of fresnel lens on the fronts of the panel. Cant wait until the resolution goes up!
I have not seen many diesel engines that uses injectors driven by electriciy. Diesel injectors are normally pressure based devices driven from a very precise injection pump. This pump is driven from either a cambelt or chain. The only electronic controls I have seen thus far (that is cars in for regular service) that have electronic controls are stepper motors fixed to the side of the injection pump to adjust engine timing and emissions.
The five cylinder Range-Rover diesel engine (designed by BMW) uses electronic injectors, this can not run without electricity, but I have not had the chance to get my hands on one yet. They are still all within their warrantys!
You are wrong about most diesels requiring electricity to run. Diesels with electronic control have only recently started appearing (in europe anyway over the last couple of years, Not twenty!), and most commercial vehicles are still based upon the mechanical injection pump for fuel injection / sequencing.
Re:Already happens all the time... what's the news
on
Human-Mouse Hybrids?
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· Score: 1
I 'transplated' a crash-helmet onto my cat using a length of elastic and half a tennis ball...
The PIC microchip is also quite a bit smaller than a PDP-8. The PIC being not much bigger than a postage stamp, has the advantage of being useable in hand held, battery powered equipment. A PDP-8 based on FPGA's may well be much smaller, but is unlikely to ever approach the tiny dimensions of the smaller PIC's.
Additionally there is a ton of projects available for the PIC's on the web including an awful lot of free development software. If you want to dabble in funny bit-widths, the PIC approach is certainly easier...
Slashdot Mirror
Maybe its like condom's.
99% effective, 1% totally ineffective....
How ? what are the mechanical parts that can't be replaced by 12V electrical equivalents that could be replaced by 42V ones ?
Short answer is valves. A 12V system does not have enough 'oomph' to drive a valve up and down fast enough. A 42V system on the other hand does. By using a 42V system you can make engines much more efficient and powerful by dispensing with the whole camshaft, idler and pulley arrangement. Doing this you reduce friction and have more precise control over valve opening and closing times, thereby increasing economy and power.
Don't even *think* about using any kind of mechanical switch or relay. Moving parts suck bigtime and will distort any analogue signal you try to pass through them.
With regards to relays, this statement is simply wrong. A good quality relay is infinitely superior to any electronic switch. For instance, reed relays are available which will switch from DC up to microwave frequencys at useable power levels and have 'on' resistance values which are magnitudes better than an elctronic switch. Bear in mind that a set of relay contacts is essentially just a piece of wire. Very few methods of transmitting analog signals distort less than bits of wire.
Dont believe me? Check this site out and look at some of the specifications:
http://www.pickeringrelay.com
I remember when 20MB MFM hard drives were kicking about on old IBM XT's and their clones. You could fiddle with some of the settings on the controller card and set them up as RLL drives instead. This used to give you a couple of extra megabytes, a big deal in those days.
I cant remember exactly how we did it now, but I do remember it was different for each controller. You had to load up debug to execute the setup software on the controller board, something like g=c800:5
Some drives took it OK, others just developed bad sectors.
"we germans arent all fun and sunshine..."
Transparent cases have been with us a while, what would be nice is to have all the other peripherals see-through. Certain caveats about shielding etc would obviously apply, but what about clear mice, keyboards, monitors and even printers?
Other than that, does anyone know how easy it is to keep these things clean?
Seems like a troll but I'll bite anyway....
I live in europe, electromagnetic radiation caused by cellphones does not shut schools. Here in the UK, cell towers are reguarly installed on schools. We dont seem to have a population of adolescents convulsing every time someone decides to ring their mum.
As for norway being 'irradiated' by sellafield. I would worry more about the nuclear plants closer to home. Theres a reactor north of varberg in sweden thats a hellava lot closer to norway than sellafield.
Just because you heard it from some soap dodging hippy, does not indicate that its real either...
A byproduct of this is incorrectly routed "bits" falling out of routers connected to the internet. I left a port on our main router unplugged and my server room filled up with bricks, dictionarys and reading lamps....
Plug those ports now!!
I had an old Niva that has this type of russian carb on it, It was a copy of an older deisgn webber with some 'improvements'. I swapped it out with a webber that I got from a scrap yard to sort out the emissions. My one was a 1989 'F' reg, so I have no idea what the newer ones had. I thought about putting the fiat twin cam in it, but after speaking to a few people about the conversion, decided to get a Range rover instead. Bad mistake! Every time I stopped the Range Rover I had to check to see what had fallen off... The Lada might have been agricultual, but it never let me down.
The engines are made under licence from fiat. The carbs used on the Lada(Vaz) are home grown and inferior to the fiat part.
They actually had these on display at the Electronica show in Munich this year. The effect is impressive and works well. The horizontal resolution is fairly low and if you move past the display you get this wierd 'popping' image. You need to stay stationary for the best effect. I got the impression that there was some type of fresnel lens on the fronts of the panel. Cant wait until the resolution goes up!
I have not seen many diesel engines that uses injectors driven by electriciy. Diesel injectors are normally pressure based devices driven from a very precise injection pump. This pump is driven from either a cambelt or chain. The only electronic controls I have seen thus far (that is cars in for regular service) that have electronic controls are stepper motors fixed to the side of the injection pump to adjust engine timing and emissions.
The five cylinder Range-Rover diesel engine (designed by BMW) uses electronic injectors, this can not run without electricity, but I have not had the chance to get my hands on one yet. They are still all within their warrantys!
You are wrong about most diesels requiring electricity to run. Diesels with electronic control have only recently started appearing (in europe anyway over the last couple of years, Not twenty!), and most commercial vehicles are still based upon the mechanical injection pump for fuel injection / sequencing.
I 'transplated' a crash-helmet onto my cat using a length of elastic and half a tennis ball...
The PIC microchip is also quite a bit smaller than a PDP-8. The PIC being not much bigger than a postage stamp, has the advantage of being useable in hand held, battery powered equipment. A PDP-8 based on FPGA's may well be much smaller, but is unlikely to ever approach the tiny dimensions of the smaller PIC's. Additionally there is a ton of projects available for the PIC's on the web including an awful lot of free development software. If you want to dabble in funny bit-widths, the PIC approach is certainly easier...