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 Posted: Jun 28, 2007 - 05:40 PM |
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Joined: Dec 17, 2005
Posts: 1498
Location: Europe- Estonia- Tallinn
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Cool. And if you think angry russians will stop me, then you are wrong. I'll aim the damn thing at them and turn the power up until you too can hear it  and then I'll give Svofski some kind of shielding. Not that I have anything against them.............. |
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Posted: Jun 28, 2007 - 07:30 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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gee, ok, but don't build anything like antimaterial ray generator or ion cannon instead, coz what i'd receive would be kaliningrad's sos
and we wouldn't get discovery's support on it, brainiacs already do demolition things 
btw not long ago i gave you congrats for 666th post, and now you're hopping into outstanding 700. hope i'll get smart enough to get my own 666 too |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 28, 2007 - 10:18 PM |
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Joined: Apr 20, 2007
Posts: 6070
Location: Long Island New York
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| With regards to the original concept of this thread, which was power, I found an old flux capacitor that could power the clock for 1000 years. Interested? my meter says it has just under 500,000 jigawatts |
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Jim
I have decided that I am no longer going to plan anything in advance. In a court of law this is called Pre-Meditated, and does not look good for the defense.....
Timer function not working properly? Check CLKDIV8 Fuse first
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Posted: Jun 29, 2007 - 12:20 AM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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| sure i am! how big is it? and how much does it cost? |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 29, 2007 - 02:04 AM |
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Joined: Apr 20, 2007
Posts: 6070
Location: Long Island New York
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Google it first.....
See if it will work for you |
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Jim
I have decided that I am no longer going to plan anything in advance. In a court of law this is called Pre-Meditated, and does not look good for the defense.....
Timer function not working properly? Check CLKDIV8 Fuse first
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Posted: Jun 29, 2007 - 02:54 AM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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alright you won.
should be enough for jigayears then.
and it's not that i actually believe hektoterawatt capacitors, but being used to milis and micros 6-digit number sounded reasonable.
back to lcd sub-thread i'm thinking of nokia's 6610/6610i/3100/6100/7250/7210/7250i/3200 model lcd (yes, it's used in all of those)
i'd be glad to know if these have fancy colors and reasonable size or any other fantastic advantages. and this request is dedicated to Plons  i've already googled out that they have various chips and so i'm careful.
jesus, what an ass of me. but at least my girl still claims to love me. she wouldn't notice either |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 29, 2007 - 12:25 PM |
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Joined: Apr 20, 2007
Posts: 6070
Location: Long Island New York
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Ha HA!!
I could not resist!!
I sat down and thought about your project, which now has reached epic, international proportions. Nice job!!
I had to repair a low voltage walkway light last night for my wife. The light is a solar charged device that uses a clear white LED for illumination. I can remember when white led's first came out, they cost a bundle and needed special ic's to control them. This light uses two size 'AA' rechargable cells, a couple of transistors, and a 74c14 schmitt triggered inverter, and a solar cell for charging the cells. In case you did not notice, I will say it again:"A SOLAR CELL FOR RECHARGING THE CELLS!!!!!"
The solar cell on the assembly puts out in full sunlight about +3.5vdc at low current. That is more than enough to charge the cells during the day. THe circuit draws about 7ma when the led is on, and the 'AA' cells last about 15 hours before the light is really noticeably dim.
That said, I think based on your requirements, here is what you need to do in your case:
1) Calculate your current draw, try to keep the circuit's consumption to under 5ma peak.
2) pick a micro that can run on 2.7vdc
3) if the micro has an internal oscillator, use that, and compensate for it's frequency in software. If you are using the micro strictly for controlling the LCD, storing charachter maps, button control, then this should be easy.
4) Since you are using the RTC chip, configure it for the 1hz pulse output. This can be used as an interrupt to the micro to fetch the current RTC time registers and update the lcd.
5) VERY IMPORTANT - BE PATIENT!!
Tough to do, I know.
I will see if I can find a part number off of the cell and get that to you, along with the init files i owe you. Since you are opting for the cell phone lcd's my files are not going to help as they are written for simple 16 x 2 units, but you are welcome to them.
Since the solar cell can output enough juice to fully charge two NiCad cells in 12 hours, it has more than enough to charge a couple of super caps, and run the watch at the same time during the day, and then the watch switches over to the caps at night.
Jim |
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Jim
I have decided that I am no longer going to plan anything in advance. In a court of law this is called Pre-Meditated, and does not look good for the defense.....
Timer function not working properly? Check CLKDIV8 Fuse first
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Posted: Jun 29, 2007 - 01:13 PM |
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Joined: Mar 06, 2001
Posts: 552
Location: Moscow
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Low power GLCD (0.45mA, 3V)
pdf in russian |
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Posted: Jun 29, 2007 - 03:27 PM |
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Joined: Nov 01, 2005
Posts: 6324
Location: Hilversum - the Netherlands
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Posted: Jun 29, 2007 - 10:10 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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thanks guys.
i'm devastated. i got my results of the exams today. it seems that all six (seven?) of them turned out to be failed. now i have a choice to re-enter the university or try to work them out till september. that's my first day when atmel didn't seem to matter at all.
anyways:
1. jim - the lcd is working on 3,3V so i thought about running avr and rtc on the same voltage as well. i've already bought the solar cell anyways, producing about 0,5V and the question is - do i need to transform its voltage to 5V level in order to charge supercaps?
2. zauberer - i'm not sure who was that, but the first advice i got on this topic was to think of microamps rather than miliamps. i'm going to use 1,1F caps altogether, so 45 mA seems a bit too much. but thanks for the interest
Plons - if god (or whoever) made me laying golden eggs, or at least living somewhere else than in european 3rd world country, probably i'd get one
but i like the tft cases. i've never thought of water-proofing the armwatch before, and ths gives me a clue.
yes, i'm googling my new ideas always before putting those here, but i guess i'm not that seeking pro yet. |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 29, 2007 - 11:40 PM |
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Joined: Apr 20, 2007
Posts: 6070
Location: Long Island New York
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Sorry to see your university grades need some help. That sucks
.5v out of a solar cell is not going to do you much good. to charge the supercaps you need about .25vdc above the value you need minimum
lemme see if I can pull one of those cells I have on the lamp. I can send it via standard post.
Jim |
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Jim
I have decided that I am no longer going to plan anything in advance. In a court of law this is called Pre-Meditated, and does not look good for the defense.....
Timer function not working properly? Check CLKDIV8 Fuse first
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Posted: Jun 30, 2007 - 12:52 PM |
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Joined: Nov 01, 2005
Posts: 6324
Location: Hilversum - the Netherlands
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| Mactom wrote:
Quote:
i'm devastated. i got my results of the exams today. it seems that all six (seven?) of them turned out to be failed. now i have a choice to re-enter the university or try to work them out till september. that's my first day when atmel didn't seem to matter at all.
Sorry to hear that. A bummer.
Mactom wrote:
Quote:
Plons - if god (or whoever) made me laying golden eggs, or at least living somewhere else than in european 3rd world country, probably i'd get one
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Dragon broken ? Or problems with the Parallel Port Programmer ? Scroll down on my projects-page http://www.aplomb.nl/TechStuff/TechStuff.html for tips
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Posted: Jun 30, 2007 - 01:31 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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hmm... to be honest i bought this cell because it also generates maz 70mA current, so i thought of transforming it into 3,3V and 10.5mA, let's say. anyways if you think that your cell is far better than mine in this context, before sending it to me perhaps i could try to find such a lamp you menioned on the internet, in low price (damaged, for instance).
but remember that all of this makes sense if only this cell is small enough to fit my arm mine is 2,5x5cm + some space for tansforming the voltage (if only it's possible)
plons - you're right i did wrong not to read the specification yet. and the boost voltage, well, need to know how much is it and how could i generate one.
i'm thinking of making the backlight very dull to save the power, because as someone said on other thred, it is hard to read anything from nokia lcd when the backlight is off.
and if the supercaps fail, i found out recently that i also have Nokia 1610, 3330 and IPaq batteries. |
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Posted: Jun 30, 2007 - 03:40 PM |
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Joined: Mar 06, 2001
Posts: 552
Location: Moscow
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| Sorry, @mactom, mt6464b has supply current about 450 microamps (or 0,45mA). |
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Posted: Jun 30, 2007 - 03:56 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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| sheet, you're right. i really, really need more sleep. |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 30, 2007 - 05:10 PM |
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Joined: Mar 06, 2001
Posts: 552
Location: Moscow
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| Second bad news (after university)is that you need more solar cell connected in series to achieve 1.5 - 2.0V. |
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Posted: Jun 30, 2007 - 05:31 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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| so there is actually no way to make higher voltage of it? i think i've seen somewhere in univ books a voltage increasing circuit in cost of the current so the overall power is not changed. something like an ac transformer, but as far as i can recall it was based on operational amp. but maybe it consumes too much power itself to be useful. |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 30, 2007 - 05:33 PM |
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Joined: Oct 29, 2006
Posts: 2758
Location: Sweden
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Quote:
Second bad news (after university)is that you need more solar cell connected in series to achieve 1.5 - 2.0V.
Maybe make some nice sweater of solar cells |
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Posted: Jun 30, 2007 - 06:04 PM |
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Joined: Jun 15, 2007
Posts: 110
Location: Gdańsk, Poland
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| i think i'll note down all those ironic remarks and put them altogether in project description when i finally make things work. |
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Not entirely familiar with AVR thingies... yet.
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Posted: Jun 30, 2007 - 07:19 PM |
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Joined: Dec 17, 2005
Posts: 1498
Location: Europe- Estonia- Tallinn
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| Try that for a booster: MAX1674 or MAX756. Neat little chips. Hand solderable. I have used that to power my flashlight LED from one AA cell. Used a 5W "monster" LED. White one. Worked reasonably well. |
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