Does anyone have like this, or something similar?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10080
or
It would be good for a lot of measurements, including battery charging, discharging even with high current, could be used to imr cells, flashlight consumption could be easily measured etc etc
Looks interesting and a great price...but sorry no I don't have one; Thanks for sharing the info though.
I was thinking of getting one too. Youtube user Fearlessthinker made some low current measurements for me.
I bought one 2 months ago, still waiting on the last backorder item before my order ships, which I'm expecting to arrive around march this year. Im not expecting too much accuracy in the low current range? (less than 1A) but thats just a guess. Im hoping to be measuring around the 70A mark, but I can see how mine goes when it arrives. Probably be old news be then.. lol, and this thread will be well and truly lost and forgotten....
Just saw the video, maybe its more of an absolute offset, which could be related to the overheads of the unit itself? time will tell.
after all, I bought this:
it's almost half the price than the turnigy (including shipping cost), only 20A, but it will be enough for me.
Hi guys,
First off, "Hello, I'm new! Nice to meet you :)"
I'm wondering if you can clarify this device for me. Specifically, I need something that can measure the actual mAh of lithium ion cells. I need to create some basic 4S packs, and to do so requires roughly matching similar capacity cells.
It looks to me like the first configuration diagram on the eBay page would work for me. I'm a little concerned that this will drain down to 0V. But perhaps it has programmable protection? If not, I could add a basic protection circuit to each cell I was testing.
Am I understanding this device correctly?
finally it arrived... and works:
a quick test with a salvaged sanyo cell: 2.05Ah, in other words 2050mAh at 2.4A discharge current.
is the max determined by watts, ie 20A at ~4 volts?
Can you also use as regulated power supply? Sorry, I'm a little electronics ignorant...
No it's only a measuring equipment which can measure voltage, current, watt, Ah at the same time.
ahh, so you had to use something else to actually consume the power...and that measures....
still, a pretty handy item!
exactly,
the best, that it has a quite wide current and voltage range
here only $14 with coupon (I think, this is the same as mine): http://www.buyincoins.com/dc-dc-20a-dual-display-digital-lcd-power-current-voltage-amp-meter-va-voltmeter-dc-dc-20a-dual-display-digital-lcd-power-current-product-11856.html
spent $70, i think i'd better breath a little before clicking anymore paypal!
i have a `Watts up` voltage/watt meter (60A), i bought it when i was building a 3 x MCE bicycle light,
trying different battery packs, drivers, boost or buck and different current levels to give me the 3 hour runtime i required
lovely piece of kit, it has an auxilary DC input so to measure down to 0v
I got one more from buyincoins.
I can confirm, this is exactly the same, what I bought on ebay earlier.
Very good little equipment.
Me too.
Right now I am testing mine battery stock
edit
Till now:
4,21V-3,10V 1,6A
UF blue 2400-2,20Ah (0,62Ah 3,5V)
No name unprotected- 1,89Ah (0,82Ah 3,5V)
3x TF flame- 1,95Ah-2,05Ah (0,75Ah 3,5V)
Xtar 2600- 2,50Ah (1,55Ah 3,5V)
Got my turnigy one. So far its great for high amperage items that connect to large batteries. Anything below 100mA or so it doesn't measure, or so I suspect is the case in my limited testing.
Im planning to be measuring 70+ amps from 3S batteries so its perfect for the job. What is nice is the convenience it offers, where I can connect really any large battery to whatever I'm using. Recently I used it to monitor the voltage of a SLA battery as I was using a portable air compressor. Watching the voltage sag under load, and monitoring the discharge rate and capacity discharged. Informed me of how much the SLA had aged over the years!