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skvark |
2014-03-12
, 14:28
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Posts: 100 |
Thanked: 389 times |
Joined on Dec 2013
@ Finland
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#41
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Originally Posted by Markkyboy
The value depends on which scale the multimeter is. For example my multimeter has mA and ĩA and A. There's 1000 mA in one A etc. (see: http://www.adafruit.com/index.php?ma...08wire_LRG.jpg This is very basic stuff
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2014-03-13
, 19:42
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Posts: 433 |
Thanked: 727 times |
Joined on Oct 2012
@ Costa Blanca, Espaņa
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#42
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Thanks skvark. I found my skytronic multimeter and put a fresh battery in!
Right new figures, which show much more promise! I set the multimeter to 200mA setting and showed the panel the light, the reading shot off the scale, leaving a number 1 on the left side of the meter screen, this represents that it went past the given rate!
I thought i'd see what voltage the panel is outputting. I read this as 5.7v or perhaps I'm a wally!, am I reading this right?, I believe I am.
So, evidently, my panel is outputting nicely. Based on a figure of 200mA, surely I can assume now, that is is sufficient to charge the phone?, none of this really tallies with the figures CSD Tool is giving! (because of my lack of knowledge I suppose!)
By the way, how is your panel connected to your pogo pins?
Last edited by Markkyboy; 2014-03-13 at 20:52. Reason: bad info/questioning
Right new figures, which show much more promise! I set the multimeter to 200mA setting and showed the panel the light, the reading shot off the scale, leaving a number 1 on the left side of the meter screen, this represents that it went past the given rate!
I thought i'd see what voltage the panel is outputting. I read this as 5.7v or perhaps I'm a wally!, am I reading this right?, I believe I am.
So, evidently, my panel is outputting nicely. Based on a figure of 200mA, surely I can assume now, that is is sufficient to charge the phone?, none of this really tallies with the figures CSD Tool is giving! (because of my lack of knowledge I suppose!)
By the way, how is your panel connected to your pogo pins?
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Last edited by Markkyboy; 2014-03-13 at 20:52. Reason: bad info/questioning
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2014-03-13
, 20:30
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Community Council |
Posts: 4,920 |
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Joined on May 2012
@ Southerrn Finland
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#43
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@Markkyboy, what are you using as a load?
You cannot just put your ammeter across the voltage source and get a meaningful reading, heh
You cannot just put your ammeter across the voltage source and get a meaningful reading, heh
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2014-03-13
, 21:51
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Posts: 433 |
Thanked: 727 times |
Joined on Oct 2012
@ Costa Blanca, Espaņa
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#44
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Originally Posted by juiceme
Hi juiceme,
@Markkyboy, what are you using as a load?
You cannot just put your ammeter across the voltage source and get a meaningful reading, heh
yep, as you have guessed, I don't really know what I'm doing!
I'm crap at all this, but keen to learn!
No load on the panel, just a 20 watt halogen lamp at 40mm distance.
I need to get it back on the phone and test again, but as I have clearly displayed, its all a lot of guess work!
Feel free to rib me all the way, I gotta learn somehow!
__________________
..oO(Don't just sit there standing around, pick up a shovel and sweep up!)Oo..
..oO(Don't just sit there standing around, pick up a shovel and sweep up!)Oo..
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2014-03-13
, 23:08
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Posts: 100 |
Thanked: 389 times |
Joined on Dec 2013
@ Finland
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#45
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Originally Posted by Markkyboy
First, read this: http://learn.adafruit.com/multimeters/overview
Thanks skvark. I found my skytronic multimeter and put a fresh battery in!
Right new figures, which show much more promise! I set the multimeter to 200mA setting and showed the panel the light, the reading shot off the scale, leaving a number 1 on the left side of the meter screen, this represents that it went past the given rate!
I thought i'd see what voltage the panel is outputting. I read this as 5.7v or perhaps I'm a wally!, am I reading this right?, I believe I am.
So, evidently, my panel is outputting nicely. Based on a figure of 200mA, surely I can assume now, that is is sufficient to charge the phone?, none of this really tallies with the figures CSD Tool is giving! (because of my lack of knowledge I suppose!)
By the way, how is your panel connected to your pogo pins?
It's a very nice tutorial covering a lot of stuff how to use a multimeter.
The voltage value seems to be right.
About current sensing.. you have to get the current to flow trough the multimeter. Basically the multimeter has to be connected between the phone and the panel.
I have just two wires soldered/glued to the backside of the panel. They are positioned so that they touch the pogo pins when TOH is in place. I'm going to change the wires to copper tape later because they are too thick and prevent TOH to lock fully from the other side.
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2014-03-13
, 23:19
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Posts: 433 |
Thanked: 727 times |
Joined on Oct 2012
@ Costa Blanca, Espaņa
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#46
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http://learn.adafruit.com/multimeters/overview"]http://learn.adafruit.com/multimeters/overview[/URL]
It's a very nice tutorial covering a lot of stuff how to use a multimeter.
Thanks for this, page saved/pdf downloaded.
It's a very nice tutorial covering a lot of stuff how to use a multimeter.
Thanks for this, page saved/pdf downloaded.
__________________
..oO(Don't just sit there standing around, pick up a shovel and sweep up!)Oo..
..oO(Don't just sit there standing around, pick up a shovel and sweep up!)Oo..
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2014-03-14
, 01:06
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Posts: 819 |
Thanked: 806 times |
Joined on Jun 2009
@ Oxnard, Ca.
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#47
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WYSIPS google it.
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On duh count uh tree
On duh count uh tree
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2014-03-24
, 15:28
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Posts: 29 |
Thanked: 43 times |
Joined on Mar 2014
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#48
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Yesterday i have assembled my solar other half using those flexible solar panels (link posted earlier in the thread).
All seems to be working except that the phone is not charging
I think the problem might be that the panels are not delivering enough energy and voltage drops too much so that the phone stops charging from the other half.
I used multimeter and on unattached TOH i can see 6V. But once i attach it drops to 0.6V
I also tried:
# cat /sys/devices/platform/msm_ssbi.0/pm8038-core/pm8xxx-adc/dcin
Result:37554 Raw:24767
Quite unexpectedly the "Result" value raises as in darkness...
Any other ideas what might be wrong?
All seems to be working except that the phone is not charging
I think the problem might be that the panels are not delivering enough energy and voltage drops too much so that the phone stops charging from the other half.
I used multimeter and on unattached TOH i can see 6V. But once i attach it drops to 0.6V
I also tried:
# cat /sys/devices/platform/msm_ssbi.0/pm8038-core/pm8xxx-adc/dcin
Result:37554 Raw:24767
Quite unexpectedly the "Result" value raises as in darkness...
Any other ideas what might be wrong?
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2014-03-24
, 19:11
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Posts: 100 |
Thanked: 389 times |
Joined on Dec 2013
@ Finland
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#49
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Originally Posted by psonek
That 3,75 V is too low. Could you measure current with multimeter? Also double check connections.Those copper stripes seem to be very close to each other.
Yesterday i have assembled my solar other half using those flexible solar panels (link posted earlier in the thread).
All seems to be working except that the phone is not charging
I think the problem might be that the panels are not delivering enough energy and voltage drops too much so that the phone stops charging from the other half.
I used multimeter and on unattached TOH i can see 6V. But once i attach it drops to 0.6V
I also tried:
# cat /sys/devices/platform/msm_ssbi.0/pm8038-core/pm8xxx-adc/dcin
Result:37554 Raw:24767
Quite unexpectedly the "Result" value raises as in darkness...
Any other ideas what might be wrong?
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2014-03-24
, 21:02
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Posts: 29 |
Thanked: 43 times |
Joined on Mar 2014
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#50
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Hi,
oki, i will try to check current but need to lead the wires out of the case, so it might take a few days until i get to it...
The copper stripes are close, but as far as i could check they seem to be ok. There is 6V on them when measured with multimeter and when i placed a piece of plasticine the pogo pins made two holes on the right places...
oki, i will try to check current but need to lead the wires out of the case, so it might take a few days until i get to it...
The copper stripes are close, but as far as i could check they seem to be ok. There is 6V on them when measured with multimeter and when i placed a piece of plasticine the pogo pins made two holes on the right places...