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ChunkyButt200

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Reply with quote  #31 
Quote:
Originally Posted by MegaVape
Charging rate on this board?
states 1 amp. with my usb meter i've only seen .82 amps. 

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1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
Spirometry

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Reply with quote  #32 
Quote:
Originally Posted by ChunkyButt200
states 1 amp. with my usb meter i've only seen .82 amps. 


Is it possible, that it is 1 Amp on the battery side.

4.2v x 1a = 4.2w (battery side)

4.2w / 5.0v = 0.84 A (usb side)
ChunkyButt200

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Reply with quote  #33 
Quote:
Originally Posted by Spirometry


1 Amp on the battery side.

4.2v x 1a = 4.2w (battery side)

4.2w / 5.0v = 0.84 A (usb side)
never bothered to figure the math. figured it was the cheap usb meter i bought off ebay. thanks spiro! help me out here....... so when i figure for my VS dna 200 that has a 2 amp charge rate..... so 12.6v x 2a = 25.2w, 25.2w /5.0v = 5.04 amps usb? usb meter is only reading between 2.00 - 2.14 amps when the shark is charging. am i doing the math wrong?

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1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
Spirometry

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Reply with quote  #34 
Now you having me scratching my head. My Vaporshark is drawing 2 amps on the usb side.

Maybe I was wrong on the first statement. I haven't had a chance to build my dna75 yet, to test it.
ChunkyButt200

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Reply with quote  #35 
Quote:
Originally Posted by Spirometry
Now you having me scratching my head. My Vaporshark is drawing 2 amps on the usb side.

Maybe I was wrong on the first statement. I haven't had a chance to build my dna75 yet, to test it.
i'm going to open up my homemade vt75 and test the current going to the battery with my klein mutli meter and get this figured out. will post back.


edit......the multi meter inline with the battery-to-board circuit confuses the board/charger. i could not get the usb current above .17 amps. at .17 amps i was at about 0.163 amps on the battery side/MM side (if the numbers are even accurate). oh well, i'm not complaining. this 3000 mah charges decently fast with the on board charger.

although, i do have some tiny 1 amp micro usb lithium battery charging board. there's room inside for them. maybe i'll put them inside somewhere.

you can stack these charging boards (parallel the outputs) to double the charge rate from 1 to 2 amps.
IMG_20160520_223457-1.jpg 



__________________
1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
VapingBad

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Reply with quote  #36 
That all correct the Shark DNA 200 does charge at 2 A from the USB, the 75 doesn't need an amp from the USB to provide an amp to the battery.  I can see it is confusing in that the specified charge current applies to the UDB for DNA 200s and to the battery side on DNA 75, I assume it is so as I clock mine at around 0.8 A on a metre which is consistent with 1 A charging on the battery side.
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• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •

Latest versions of EScribe: DNA 200/250DNA 75
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