Posted by DaGriff |
Aug 26, 2015 @ 12:18 AM | 1,685 Views
I wanted to get a charging station that was capable of charging up batteries in about 15-25 mins. That way with about 4 batteries I could keep a rotation of batteries going flying, resting and charging, with out wasting precious time.
The charger I found that could do the job and got all of good reviews, was the Turnigy Reaktor 300w 20a charger and only cost about $60. It would be able to charge a 3S 5000mah battery in about 20 mins, while charging at 4C (jury is still out on if this is safe or not) It was perfect, but in order to get a 20a output I needed a power supply that was able to supply 24v at 10-12A. You could buy once off the shelf for $300. But I didn't want to spend that kind of money and part of the fun of RC is building stuff your self.
I decided to do a DPS-600PB conversion. I needed to get the output to over 18v to run the charger at max output, so I decided to link two of them in series to get up to 24v and achieve that max output. The main issue with having two power supplies running in series, is the dc ground issue. If the cases touch sparks could fly and your heart could stop. I didn't want that so I set out to isolate the DC grounds and then reattach an external DC ground on one of the power supplies, the one that would supply the ground to my charger. This idea is credited to Z20 RC and his YouTube videos.
Don't try this at home if you don't know what your doing. I have allot of experience with 12v electrical. Doing this wrong could result in...Continue Reading
Posted by DaGriff |
Jun 24, 2015 @ 03:49 PM | 889 Views
I just put together the first part of my HJ 450 build and I just had to share it with someone. Feel free to comment if you want, I'm open to help and suggestions as this if my first scratch build. My wife doesn't really have math science mind so when I'm staring at the wall and i break the silence with "AHH HAA, I finally figured it out, what I'm going to do is get two server power supplies and float the DC ground and then daisy chain them together so I'll have 24v with 90a to be able to charge my 3s batteries in 15 mins,. What she hears is "AHH HAA, XXXX XXXX XXXX XXXXXX XXX XXXX XXX XXXXXX XXX XX, batteries in 15 mins." Which is what happens yesterday while we were at a wedding. So I share with you, the people who get it.
The goal is to build a 450 quad capable of 15 min flight times for general flying fun with the future FPV Add ons. So far I have my motors props and frame. Still have a long way to go. The pictures are not much to look at yet but I'm having fun. Thank for letting me share.