Espritmodel.com Telemetry Radio
Dani123's blog
Archive for September, 2012
Posted by Dani123 | Sep 25, 2012 @ 11:57 AM | 3,774 Views
Hi guys

After the first success, both building and flying, a couple of friends asked me to do a regulator for them also.
This time I wanted to make it neater and more compact, mainly flatter so one could tug it in tight spaces in DLG fuse.

Today I made two more, experimenting with different component placements, and this time I used a PCB board to help with that.

In the pictures you see v3 and v4 of the regulators. In the final version I put the large capacitor at the side, so I've got a more flatter design.
I think that I've settled on the v4 version, I really like the minimal cross section.
Dani
Posted by Dani123 | Sep 20, 2012 @ 01:38 PM | 3,823 Views
Hi guys

So, I received my 2s lipo this week and finally wanted to install it together with the homemade regulator inside my SG pod, here it goes.

First, I wanted to changed as little as possible in the pod, so upon inspection I changed the JST female from the original regulator build to regular servo female plug. I will install it after the SJ in the fuse, so I will still able to charge the battery through the plug (without balance of course).

Second, comparing the two batteries, I already have a gain of 10gr, with the regulator being around 5gr, I added another 5~6 in the nose. Taking into account that the lipo won't come as forward as the original pack.

Removed the battery, some wires were re-routed so it will all fit inside in the best way. All fit snugly in. Tomorrow I will see about the added flight time.

Enjoy
...Continue Reading
Posted by Dani123 | Sep 20, 2012 @ 10:59 AM | 3,599 Views
Here is the original thread: http://www.rcgroups.com/forums/showthread.php?t=1732797

These are still available.
The SJ are made with high quality 3.5mm spring loaded female mono socket. The standard plugs are 3.5mm red plastic with red ribbon to see it clearly plugged in the glider. Come in two versions of connectors, see pictures attached.

PM me if you are interested.

Enjoy
Dani
Posted by Dani123 | Sep 08, 2012 @ 01:01 PM | 3,909 Views
This is a mini build (solder) log of my voltage regulator for DLG use.

After reading various threads on the subject and collecting many advices, I decided to make my own voltage regulator.

Why? Well, there are couple of reasons for that...
First, up until now I've flown my gliders on 4 NiMh 400mAh cells. Those provide sufficient time for 2 analog and 2 digital servos, but when I went for 4 digitals (2xJR285 2xDS09) my max flying time went down.
Second, trying something new is always welcome.
And finally, I've been always confident in my soldering skills, I always solder my own packs, switch jacks and the wiring in the pod, with no issues.

So, here we go.
I've found this regulator for the job: KA278RA05C. This is a low dropout voltage regulator. It is important if you run the pack to the limit. This regulator is rated up to 2A, so no issues here for overload. The unit has 4 legs as it can deliver adjustable voltage along with a constant 5v - which I'm interested in.

One 0.1uf capacitor is soldered across input terminals and another slightly larger 22uf is placed on the outputs.

The whole assembly is shown in the pictures, "standard" dead bug installation, with my connectors of choice. Female JST for the input and servo connector for the output.

I used my standard lightweight leads (white). These are very light and high quality, these come from wired strain gages... And, I have tons of them so I use them wherever I can.

The whole thing resulted in 4.8gr ready for use. Next, I have to wait for my LiPo to arrive and will install it in my SG instead of the NiMh pack.
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Next, I should try to make it on a PCB to make it neater. Maybe I should prewire the SJ to the regulator for the next one.

Dani