[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
jonheal;173035 Wrote: > Tell 'em you want your coffee cold, too. That'll save a few extra > watts!:-) The expression that comes to mind over all this is "penny-wise, pound-foolish". TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Skunk;172965 Wrote: > Plus you'll *feel* better if you walk to Starbucks. > > The humorous thing is people act like the two (walking and turning > things off) are mutually exclusive. Turn the freakin' light off before > you go! Tell 'em you want your coffee cold, too. That'll save a few extra watts! :-) -- jonheal Jon Heal says: Have a nice day! http://www.theheals.org/ ~~~ SB3 (wired - 6.3.1) | Home-brew PC running XP Pro | DENON DRA-395 | PSB Stratus Bronze (2) | Outlaw Audio LFM-2 (1) | DIY Speaker Cables | Dayton Audio Interconnects jonheal's Profile: http://forums.slimdevices.com/member.php?userid=2133 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Our daughter has a curious one-way effect on instant-on televisions. She walks into a room, the TV comes on. The effect is not symettric, though - when she walks out of the room, the TV never goes off again. Drives me absolutely nuts. -- Michaelwagner Michaelwagner's Profile: http://forums.slimdevices.com/member.php?userid=428 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
jonheal;172909 Wrote: > This is all very humorous. > > Restrict your driving so that you use THREE gallons less gasoline > (maybe, what ... 75 miles?), and you've saved enough energy to run your > SqueezeBox full blast for a year. Plus you'll *feel* better if you walk to Starbucks. The humorous thing is people act like the two (walking and turning things off) are mutually exclusive. Turn the freakin' light off before you go! -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
cparker;172543 Wrote: > Hi Peter > > This is very interesting research. If other people have measuring > devices, could I ask that they measure the usage of their amp and its > make/model? I'm looking to replace my amp in the future and want to > find the least power hungry one! > > I'll measure my amp and put the details in this thread just for > interest :) > > Cheers Class D amplifiers tend to be more efficient by design. I suppose you could bring a "Kill-a-Watt" or "Watts Up" to a store and measure stuff. -- SuperQ SuperQ's Profile: http://forums.slimdevices.com/member.php?userid=2139 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
This is all very humorous. Restrict your driving so that you use SIX gallons less gasoline (maybe, what ... 150 miles?), and you've saved enough energy to run your SqueezeBox full blast for a year. -- jonheal Jon Heal says: Have a nice day! http://www.theheals.org/ ~~~ SB3 (wired - 6.3.1) | Home-brew PC running XP Pro | DENON DRA-395 | PSB Stratus Bronze (2) | Outlaw Audio LFM-2 (1) | DIY Speaker Cables | Dayton Audio Interconnects jonheal's Profile: http://forums.slimdevices.com/member.php?userid=2133 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;172678 Wrote: > If you are looking for a minimal power drain amplifier, get a "Class-D" > amplifier. They are essentially switch-mode power supplies with the > input signal as a reference and the output connected to a speaker. > Efficiencies run as high as 90%. These are relatively new and not many > are available I don't know if they are many available or not for general home use, but they are often used in high power car systems, and the fist comercially available one I saw actually being used was back in 1980 (27 years ago), so they are not all that new. But yes, they are extremely efficient. I always wanted to make one with a digital input directly controlling the PWM, thus elimination the need for a conventional D/A converter, but so far have been too lazy to do so. Tom -- st2lemans st2lemans's Profile: http://forums.slimdevices.com/member.php?userid=9539 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
If the point was to generate heat, I'd agree with you. But the point was, we keep these devices on for utility. They "waste" a certain amount of power when on standby. The claim was made that this isn't totally wasted, because it generates heat, so the "waste" is at least partially offset by lowered other heat costs. -- Michaelwagner Michaelwagner's Profile: http://forums.slimdevices.com/member.php?userid=428 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
My initial point is getting lost: Electricity is an inefficient method of generating heat. Better to turn off devices and use fossil fuels, bio-fuels for heating. The point about Nuclear power and Hydro-electric being completely clean is incorrect when you consider the embodied energy in construction and decommisioing. Both methods may make electricity more efficiently then a power station (35% effieicent) but still better to turn off devices and not consider it a form of heating -- Paul_B Paul ~ Slimserver 6.5.1 on EPIA VIA EN15000 Mini-ITX running Windows 2003 R2. Remote storage QNAP(1.2.1)~(160GB Maxtor) SB3 (x1) RIP - dBpowerAMP R12 (Alpha) to FLAC ID3 Tags - MP3Tag v2.36 ~ Paul_B's Profile: http://forums.slimdevices.com/member.php?userid=3039 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Paul_B;172729 Wrote: > Most electricity isn't nuclear, most power is fossil fuel. This is highly dependent on where you live. Where I live: > Ontario Power Generation operates 64 hydroelectric, 5 fossil and 3 > nuclear stations producing more than 22,000 megawatts of much needed > electricity. > > In 2005, approximately 71% of OPG's electricity production was derived > from hydroelectric and nuclear sources -- Michaelwagner Michaelwagner's Profile: http://forums.slimdevices.com/member.php?userid=428 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
(thread drift) I've seen numbers that suggest that devices on standby use a surprisingly high percentage of domestic power overall, just due to their prevalence and the total time they are running. Recent improvements seem to have driven the wattages much lower, but that's countered by all those where 'standby' is the only 'off'. Ideally such devices would be ideal candidates for a solar generator with battery backup. The house could use grid power when anything needed 'real' power, but that 'background level of usage that adds up to so much overall would be taken care of. Unfortunately systems aren't designed like that. -- karma mechanic karma mechanic's Profile: http://forums.slimdevices.com/member.php?userid=8868 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Mark Lanctot;172682 Wrote: > > My current one is MUCH more powerful, yet doesn't have a heatsink. I > was concerned about this, but it doesn't even get warm during > operation. This implies a lot less power wasted as heat. Class D amps were first applied to battery operated systems that needed maximum efficieny to extend battery life. Think hearing aids and cell phones. Subwoofers were next because the circuits available at the time didn't allow fast enough sampling to operate over the entire audio band, but they could make a decent bass amp that didn't require much of a heatsink, which is a large, expensive part. Now there are full audio bandwidth class D power amps available (TI and other make ICs, Tripath, modules, etc.). Expect to see more of them and fewer analog amps as time passes. TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Most electricity isn't nuclear, most power is fossil fuel. Also worth considering is the embodied energy in a nuclear power station. How much CO2 is release in the construction of the nuclear power station and how much CO2 is released during the decommisioning of a nuclear power station? Radioactive isotyopes have a very long half life and this should be taken into account when looking at power generated by a nuclear power station -- Paul_B Paul ~ Slimserver 6.5.1 on EPIA VIA EN15000 Mini-ITX running Windows 2003 R2. Remote storage QNAP(1.2.1)~(160GB Maxtor) SB3 (x1) RIP - dBpowerAMP R12 (Alpha) to FLAC ID3 Tags - MP3Tag v2.36 ~ Paul_B's Profile: http://forums.slimdevices.com/member.php?userid=3039 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Paul_B;172690 Wrote: > In reference to Karma's post about heating. Electricity is a very > inefficient form of heating. A fossile fuel power station is at best > 35% efficient, then take into account power line losses and > inefficiencies in the transformer. You are much better turning off the > device and using raw fossil fuel for heating. > > I am posting in the UK and most houses use gas, even my 8 year olde > non-condensing boiler is 75% efficient. However, electricity can be generated by nuclear power plants, which do not contribute to any increase of CO2 in the atmosphere. -- P Floding P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
In reference to Karma's post about heating. Electricity is a very inefficient form of heating. A fossile fuel power station is at best 35% efficient, then take into account power line losses and inefficiencies in the transformer. You are much better turning off the device and using raw fossil fuel for heating. I am posting in the UK and most houses use gas, even my 8 year olde non-condensing boiler is 75% efficient. -- Paul_B Paul ~ Slimserver 6.5.1 on EPIA VIA EN15000 Mini-ITX running Windows 2003 R2. Remote storage QNAP(1.2.1)~(160GB Maxtor) SB3 (x1) RIP - dBpowerAMP R12 (Alpha) to FLAC ID3 Tags - MP3Tag v2.36 ~ Paul_B's Profile: http://forums.slimdevices.com/member.php?userid=3039 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;172678 Wrote: > If you are looking for a minimal power drain amplifier, get a "Class-D" > amplifier. They are essentially switch-mode power supplies with the > input signal as a reference and the output connected to a speaker. > Efficiencies run as high as 90%. These are relatively new and not many > are available, but more and more are coming out every year as engineers > get comfortable with the designs and the cost of the parts continues to > drop. As an aside, I understand most subwoofers employ Class-D amplifiers. My first subwoofer was not. It had a honking big heatsink which would get hot. My current one is MUCH more powerful, yet doesn't have a heatsink. I was concerned about this, but it doesn't even get warm during operation. This implies a lot less power wasted as heat. -- Mark Lanctot "It's like, you know, a New Age religion, but with better treble response." - Jon Heal Mark Lanctot's Profile: http://forums.slimdevices.com/member.php?userid=2071 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
If you are looking for a minimal power drain amplifier, get a "Class-D" amplifier. They are essentially switch-mode power supplies with the input signal as a reference and the output connected to a speaker. Efficiencies run as high as 90%. These are relatively new and not many are available, but more and more are coming out every year as engineers get comfortable with the designs and the cost of the parts continues to drop. Class A amplifiers are usually very large, heavy, VERY expensive, and waste huge amounts of power. Efficiency is no more than 50% maximum at full volume and they are much less efficient at lower volume levels. Class B and Class AB amps aren't too bad. They use little power at low volume levels so efficiency runs in the 50-70% range. Almost all commercial amps made in the last 30 years or so are Class B or AB. If you want to minimize power consumption, get a low powered amp. TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
cparker;172543 Wrote: > > This is very interesting research. If other people have measuring > devices, could I ask that they measure the usage of their amp and its > make/model? I'm looking to replace my amp in the future and want to > find the least power hungry one! > > I'll measure my amp and put the details in this thread just for > interest :) > If you want to post data, I'd suggest using the Wiki, and I'd suggest only posting data about gear that's still available for sale. I wouldn't expect many contributions, though -- most people don't have the means to measure real AC power usage (http://en.wikipedia.org/wiki/Power_factor). Most folks probably don't even have multimeters for measuring Volt-Amps, to say nothing of being comfortable rigging a multimeter into a live AC power line, or the fact that there are Slim Devices customers worldwide. I wouldn't worry too much, though. Every piece of regular electronic gear I've tested that was made in the last 4 years or so draws about 1 watt or less in "off"/standby mode (when "off" really means "off", unlike the Squeezebox, etc.) -- everything from my 30 watt computer monitor to my 150 watt TV. IRBlaster should be great for such amps. Older gear isn't as efficient. My 20-year-old stereo receiver from a reputable company draws 7 watts in off/standby. My 6 year old computer speakers have an automatic standby feature, but they draw about the same power as the Squeezebox -- about 6 watts at normal listening levels when on, and still about 4 watts when the speakers slip into "standby" mode. This older gear begs for tools like AMPSwitch and BottleRocket (I think). -Peter -- peterw peterw's Profile: http://forums.slimdevices.com/member.php?userid=2107 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Although my house has a number of devices which draw a small amount of power when on standby, the effect of these is to add a little bit of warmth to the house. If they weren't doing it then the heating system would have to do it. Ok, that only applies in the winter, but it does mean that 'wasted power' is only really wasted in the summer. I tried to measure the background consumption of the house, with everything off except those things that are generally on all the time (e.g cordless phones, network router, wireless burglar alarm system, a number of devices that are on standby like the SB). Counting and timing the fine graduations on the wheel in the meter unit suggested that the house was using 150 watts. That seems a bit high for 24x7, maybe the fridge or freezer kicked in for part of the time. -- karma mechanic karma mechanic's Profile: http://forums.slimdevices.com/member.php?userid=8868 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
peterw;171382 Wrote:
>
> The lowest power draw was attained by having the Squeezebox idle ("on"
> or "off", as long as it's not playing an audio stream) with the
> brightness set so the display was completely dark. This took 4 watts
> (US adapter, ~120v AC power, and yes, watts, not volt-amps). I tried
> disabling the wireless bridging and having the audio outputs disabled
> when the Squeezebox was "off", but it still pulled 4 watts when idle
> and dark.-Peter
Hi Peter
This is very interesting research. If other people have measuring
devices, could I ask that they measure the usage of their amp and its
make/model? I'm looking to replace my amp in the future and want to
find the least power hungry one!
I'll measure my amp and put the details in this thread just for
interest :)
Cheers
--
cparker
cparker's Profile: http://forums.slimdevices.com/member.php?userid=2083
View this thread: http://forums.slimdevices.com/showthread.php?t=31789
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[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;172183 Wrote: > While it is true that every little bit helps, not every little bit is > significant, and it is wrong to teach that it is. Not if you live off-the-grid, but I see your point. -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
While it is true that every little bit helps, not every little bit is significant, and it is wrong to teach that it is. If you focus people of fixing the 5 watt Squeezebox power "waste" problem, they start feeling more comfortable about driving a Hummer, because they feel they have "done their part". The focus and effort needs to be placed where it will do the most good, not where it will make people feel good about doing something/anything. Fixing big problems takes more effort and the gratification isn't instantaneous like unplugging your SB and getting a warm fuzzy feeling that you are doing your part to save the world. Hard work and sustained effort are the only things that will solve the real problems and it will take a long time. Being taught that every little bit helps is NOT helping fix the problem. TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
JJZolx;172178 Wrote: > What? Cause he finished grade school? Indeed, a luxury in some parts of the world/US. -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Skunk;172172 Wrote: > > > > > > As they used to tell us in grade school...> > > > No need to get hoity toity and flaunt your education. What? Cause he finished grade school? -- JJZolx Jim JJZolx's Profile: http://forums.slimdevices.com/member.php?userid=10 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;172167 Wrote: > As they used to tell us in grade school, "when you point your finger at > someone else, you point three back at yourself". > > TD No need to get hoity toity and flaunt your education. The ratio I quoted was taken from a teacher's program for grade school students, which required figuring how much coal is used by a standard incandascent bulb iirc. Don't they also teach kids these days that no effort is too small, everyone can make a difference etc.? I'm not trying to get personal, but I've been to your site and seen the bug magnifier you made w/ your son. Discovering bugs is great, but goes hand in hand w/ conservationism. Honestly I would think having a way to make turning out the lights when you leave the room scientifically interesting to a kid would be every parents dream. -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
As they used to tell us in grade school, "when you point your finger at someone else, you point three back at yourself". TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;172102 Wrote: > > Your server that drives the SB causes the burning of a lot more coal > than the SB3. Maybe you should shut the whole system off and not use > it. My computer is sometimes used to stress the importance of energy conservation, so that would have a negative impact actually. -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Skunk;171827 Wrote: > A quick google yielded the approximation of one pound of coal per 1.25 > kWh, which ~ a pound of coal burnt per week to run a Sb3. A pound of coal per week to run the SB3, or a pound of coal per hour to run your big screen TV, or 5 gallons of gasoline per hour to power your SUV down the road- it's all relative. If you worry about saving energy/CO2/whatever, put your effort into the things that pay off big, not the things that save 1 pound of coal per week. Once the other wastes have been pared down to where burning a pound of coal per week to run your squeezebox has become a big deal, then start working on it. Your server that drives the SB causes the burning of a lot more coal than the SB3. Maybe you should shut the whole system off and not use it. After all, why should the rest of us have to breathe the air polluted by the coal burned to power YOUR audio system (or YOUR SUV, or your whatever)? TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden;171762 Wrote: > > The power of the whole system is so low that it won't have any > appreciable impact on your electric bill. If you pay $0.15/kW Hr, and > the SB3 takes 6W, with power on at all times it will cost you about > $0.15/week. That comes to <$8 per year. > Erm, coal is a non-renewable resource (which probably isn't a bad thing because burning it produces carbon dioxide, sulfur dioxide, nitrogen oxides, and mercury compounds by the tons). A quick google yielded the approximation of one pound of coal per 1.25 kWh, which ~ a pound of coal burnt per week to run a Sb3. -- Skunk Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Well, there you go then- measure the power using the power meter (probably innaccurate at such low power levels), then measure the DC power by measuring current and calculating. The difference is the power dissipated by the power supply. The power of the whole system is so low that it won't have any appreciable impact on your electric bill. If you pay $0.15/kW Hr, and the SB3 takes 6W, with power on at all times it will cost you about $0.15/week. That comes to <$8 per year. The reason you'd really want to measure the power is to do something like select a "right-size" battery to operate it, which is why I suggested measuring the current instead. TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Interesting results and good point by Robin. I wonder how much the SB actually draws when it is off as opposed to how much power the transformer is taking? -- Paul_B Paul ~ Slimserver 6.5.1 on EPIA VIA EN15000 Mini-ITX running Windows 2003 R2. Remote storage QNAP(1.2.1)~(160GB Maxtor) SB3 (x1) RIP - dBpowerAMP R12 (Alpha) to FLAC ID3 Tags - MP3Tag v2.36 ~ Paul_B's Profile: http://forums.slimdevices.com/member.php?userid=3039 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
Re: [slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
tyler_durden wrote: > Measuring the DC current into the SB would be a better way to measure > power. Power = V * A (for DC). That wouldn't measure any power used by the power supply itself (ever wondered where that heat comes from?) R. ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
[slim] Re: SB2/3 power usage: 4-6 watts; display on/off is biggest factor
Measuring the DC current into the SB would be a better way to measure power. Power = V * A (for DC). This can be done accurately with any multimeter that has a current mode. TD -- tyler_durden tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=31789 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
