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Coolwind
Moderator
Italy
7511 Posts |
 Posted - 18/01/2012 : 15:11:13
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| Last but not least, CompeGPS is using the 61CS too for their Delta outdoor professional serie (near 600 euro units!) |
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Bier
Pulcino
Netherlands
17 Posts |
Posted - 21/01/2012 : 10:02:32
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A reaction to a post several pages back:
quote:
Originally posted by yplas
Hello,
I did a test today about electric consumption of the VF1 unit :
battery fully charged, One hour with full light on
Then I charge again......
And the result is 432 mA/H
Yann
P.S My old PNA was about 350 mA/h
I did a similar test on my V1 that may explain your numbers better. When first using the car charger that comes with the V1, I noticed how it heated up when charging the unit. A similar car charger stayed much cooler. This inspired me to test the power consumption using different chargers. You can see the test configuration with the standard V1 car charger and my glider's LiFePo battery in the picture below (pls also notice how my camera can't handle the bright screen ;-) ) Of course the V1 was set to full backlight and I ran LK8000 in simulation mode, rerunning one of my favourite flights.
After running the unit for exactly 2 hours I recharged the battery:
The score was 762 mAh. This equals a power consumption of 381 mAh
I repeated the test with the other car charger (no brand, just the average chinese stuff):
As you can see the score was 687 mAh, equaling an avarage power consumption of 344 mAh
The charger remained remarkably cool
Both tests started with a fully charged glider battery and a fully charged V1 battery. The power led was green all the time and I checked the battery of the V1 afterwards, just to make sure the unit was really charged.
I guess the 5V powerpacks are more common now (eliminating the need for 12->5V conversion) but for those of you that prefer using the battery of your glider, finding a better charger is worth the effort.
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Fly fast, think negative |
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lawrence
Pulcino
United Kingdom
65 Posts |
Posted - 21/01/2012 : 10:29:25
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| Guys - thanks all for the on going tests and feedback. So the car charger that comes with the V1 needs to upgraded right to something better? If this is the case I will discuss the issue with the manufacturer Cheers Lawrence |
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Bier
Pulcino
Netherlands
17 Posts |
Posted - 21/01/2012 : 11:26:25
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quote:
Originally posted by lawrence
Guys - thanks all for the on going tests and feedback. So the car charger that comes with the V1 needs to upgraded right to something better?
The difference is 40 mAh, may seem irrelevant but on the best days, you may be in the air for 8 hrs or more. 8 * 40 mAh equals 320 mAh. It could be the difference between draining your battery 10 km before the finish line or succesfully logging the best flight of your life.
State of the art glider batteries are in a 150-450 euro price range, car chargers start at $3. Looks like a no-brainer to me.
BTW, your manufacturer may want to consider an angled usb connection for the charger. The straight ones are not practical. |
Fly fast, think negative |
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lawrence
Pulcino
United Kingdom
65 Posts |
Posted - 21/01/2012 : 11:53:26
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| I have put these suggestions forward today and will update if I have any news. Kind regards Lawrence |
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begis
Pulcino
27 Posts |
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Bier
Pulcino
Netherlands
17 Posts |
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Coolwind
Moderator
Italy
7511 Posts |
Posted - 21/01/2012 : 20:14:26
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I dont think there is any difference between power suppliers for PNA.
Converting 12v to 5v is done the same. Where should the difference be?
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AlphaLima
Moderator
Germany
847 Posts |
Posted - 21/01/2012 : 22:31:38
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| In the efficiency (aka power dissipation). In the most simple worste case you can use a resistor, wasting 7/12 of the power, efficiency = 5V/12V = 42%. Good DC/DC Converters can reach an efficiency of 90% and more. |
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Coolwind
Moderator
Italy
7511 Posts |
Posted - 21/01/2012 : 23:07:44
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| A resistor?? LM7805 &c. are widely used for up to 1A, right?! |
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AlphaLima
Moderator
Germany
847 Posts |
Posted - 21/01/2012 : 23:43:08
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I know, it was just an example to illustrate, that there are diffrent ways to bring 12V down to 5V. A 7805 has almost the same bad efficiency like a resistor. The only advantage of an 7805 is that the 5V keeps stable, but you need a resistor to bring down the voltage.
Normaly 12V to 5V should be done with a LM2576 or similar. Quite efficent but causes EMV problems. A propper DC/DC design is not this easy.
Ref:
http://www.siongboon.com/projects/2005-08-07_lm2576_dc-dc_converter/
But I'm afraid we're off topic now
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Edited by - AlphaLima on 22/01/2012 02:46:12 |
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begis
Pulcino
27 Posts |
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lawrence
Pulcino
United Kingdom
65 Posts |
Posted - 23/01/2012 : 15:54:54
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| Hi guys - just a quick note to say I've tried Testdep.exe to rotate the screen but have not had any luck as yet! Cheers Lawrence |
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KarmaGianni
Falchetto
Italy
181 Posts |
Posted - 23/01/2012 : 16:09:55
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quote:
Originally posted by lawrence
Hi guys - just a quick note to say I've tried Testdep.exe to rotate the screen but have not had any luck as yet! Cheers Lawrence
That's quite surprising as TestDep works for any soaring program (XCsoar, SeeYouMob and even LK8000) with every WinCe screen I tried.
MIO, every chinese, Oudie....
You must launch it before LK8000. Copy the exe in the SD card main folder. Launch it and you'll have the rotation options (0-90-180-270°).
Maybe you can try with "CeMFC" > "Disable AYG Shell" |
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AlphaLima
Moderator
Germany
847 Posts |
Posted - 23/01/2012 : 16:52:29
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The rotation is a question of the driver, I had the same problem with the WayteQ. A new driver solved that problem.
I can send you the driver, if you like. (PM)
regards
Ulli |
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Topic |
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Sunlight readable Screens