Jesper Andersen
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Jesper Andersen's Discussions

Weird behaviour of HK KK 2.0 board (LCD version) in pre. flight tests

Started Dec 29, 2012 0 Replies

I have just replaced my old kk board with a HobbyKing KK 2.0m board (quad x-mode)The ESC's was already calibrated from the old configuration (no need to do that again right?) - I calibrate the gyros…Continue

Tags: 2.0, lcd, multiboard, kk

 

Jesper Andersen's Page

Latest Activity

DavidJames commented on Jesper Andersen's blog post And they say smoking is bad
"@Jesper Andersen With the NCR18650Bs you should get some great flight times. The B version has the greatest energy capacity.    NCR18650B has 3200-3400 mAh.    The NCR18650A is 2900 mAh. You can search for NCR18650B or…"
Apr 12
Jesper Andersen commented on Jesper Andersen's blog post And they say smoking is bad
"@David James Ok - I probably need 6 amps for take-off and 2-4 amps during flight. I just ordered two NCR18650 - let's see how they perform."
Apr 12
DavidJames commented on Jesper Andersen's blog post And they say smoking is bad
"The Panasonic NCR18650B batteries were the 3200-3400 mAh batteries that  were tested at My Geek Show.      I have tested the NCR18650Bs myself and found that they are pretty much what the Panasonic data sheet says and…"
Apr 11
Jerry Rodberg commented on Jesper Andersen's blog post And they say smoking is bad
"A poor chainsaw gets torn down and some notes about 18650 types about 4/5 of the way down from someone at MIT Based on the notes from Chuck in that link, those are long life batteries (not specifically mentioning the quality of said cells) not power…"
Apr 10
Jack Crossfire commented on Jesper Andersen's blog post And they say smoking is bad
"Li-Mn is an intriguing combination lacking the current of Li-Po, lacking the instability of Li-ion, with capacity in between.  The advantage is slightly higher power density without requiring a protection circuit."
Apr 10
Gary McCray commented on Jesper Andersen's blog post And they say smoking is bad
"Hi Jesper, The fact is that the E-Cig - Vape market has caused a whole lot of completely false 18650 style battery claims to be put out by a whole lot of completely unscrupulous manufacturers and distributors. It is basically just a pack of lies,…"
Apr 10
Ricardo Garcia commented on Jesper Andersen's blog post And they say smoking is bad
"That battery box springs is robbing some jouice in the form of heat, better to solder good cooper wire or silver tabs..."
Apr 10
Jesper Andersen commented on Jesper Andersen's blog post And they say smoking is bad
"@Bart Matthew R - I'll keep that in mind - I did however charge and discharge them two times before doing the actual test @Damian I don't think the efest is "fake" - but they are probably not as good as Panasonic or Samsung (but…"
Apr 10
Vladimir "Lazy" Khudyakov commented on Jesper Andersen's blog post And they say smoking is bad
"great, thanks :)"
Apr 10
F. C. Bearsch "Tearig" commented on Jesper Andersen's blog post And they say smoking is bad
"What is the best source for the Panasonic 18650 3400? Thank you in advance for the information"
Apr 10
Jerry Giant commented on Jesper Andersen's blog post And they say smoking is bad
"you need some more power cycles to achieve full storage capacity"
Apr 10

MR60
Hugues commented on Jesper Andersen's blog post And they say smoking is bad
"It is indeed known that if you want to avoid bad surprises with 18650 types of batteries, get original Panasonic ones. Panasonic makes them in different capacities and the highest one is 3400 mah (3200 real measured capacity)."
Apr 10
Damian commented on Jesper Andersen's blog post And they say smoking is bad
"They are probably fake with fake capacity. You need to buy "real" Panasonic or Samsung."
Apr 10
Matthew R commented on Jesper Andersen's blog post And they say smoking is bad
"I usually don't trust lithium rechargeable specs until I charge and discharge them three times before doing the "actual" testing for numbers. Your results seem plausible, but I'm still a little skeptical."
Apr 10
Dwgsparky commented on Jesper Andersen's blog post And they say smoking is bad
"Good find,  One statement does not seem to be correct though. If the internal resistance is very low then you will get LESS volt drop at any given load and so less wattage in the form of heat, I suspect that the internal resistance of these…"
Apr 10
Bart Theys commented on Jesper Andersen's blog post And they say smoking is bad
"Perhaps these batteries can win from lipo's for low current long term applications (such as your Tx )? It would be interesting to compare for different loads."
Apr 10

Profile Information

About Me:
Software architect and developer - works in the radar industry. Has worked a lot with robotics both as a hobby and thru my work.
Would like to write the very narrow targeted book "Java for vampires"

Company website: www.usavtech.com
Please tell us a bit about your UAV interest
Have a keen interest for everything that flies, especially electric powered vehicles.
Hometown:
Roskilde

Jesper Andersen's Blog

And they say smoking is bad

Posted on April 10, 2015 at 12:31am 17 Comments

Technology is often driven by request and demand, and while the drone community is growing rapidly, the number of people trying to quit smoking is probably a bit bigger. Along comes the E-Cigarette and with it, comes a demand for high current high capacity batteries - at low prices. I recently stumbled across…

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An Autopilot in the clouds - new vehicle UTV-4

Posted on March 13, 2015 at 3:30am 4 Comments

I'd thought I'd share some concept images of the new test vehicle that is currently under way.

It's designated UTV-4 (Universal Test Vehicle number 4) and will be fitted with all the hardware required by the AutoPilot system described in my earlier blogs:…

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An Autopilot in the clouds - part 6.5

Posted on February 23, 2015 at 9:30pm 4 Comments

An Autopilot in the clouds - part 6.

The loooong wait...

Weather here in Denmark is optimal right now, if you’re either a fish or create 110% waterproof hardware. So while waiting to get a decent chance for the UTV1 to…

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An Autopilot in the clouds - part 6

Posted on January 10, 2015 at 5:30am 0 Comments

This article is part six in a series, describing some of the inner workings of an autopilot system - even though the description is specific for this particular system, a lot of principles are generic and can be used to describe a variety of auto pilot systems.

To summarise the previous posts we had:…

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