Even 4ch helicopters are not cheap and I'm afraid that they can become boring quickly.
Yes, I'm worried about jumping from 3.5ch helicopters to collective pitch helicopter. But I plan to use simulator to prepare for my first flight. I'm aware of the risk. But I cannot afford 4ch helicopter just...
I have few 3.5ch helicopters and they have become boring to me and now I'm looking for something bigger, more realistic and more difficult to fly.
What do you people think about Trex clones?
They are several Trex 450 clones and they are not extremely expensive as real TREX.
Titan is the...
I got Syma S107 yesterday but there must be a problem. (As always when I order something from china)
After first charge I could achieve only 60 seconds of flight then helicopter started to loose altitude and stared to hover 2-3 cm of the ground.
After few more charging I can only get 20-30...
In my opinion VFD display would be the best choice for this project.
It has amazing color, they are bright and contrast is great because there are only individual pixels that glow. And what is the best is that VFD displays can operate in the most demanding environment. And they mostly have...
You can't just add another battery in series and not worry about current that batteries can give.
I'd never make 445nm build and use 10440 batteries.
If I couldn't afford expensive driver then I'd use 2x18350 batteries and Lm317 chip.
But even then, you have cheap boost drivers that can give...
Re: NJG-18, multimode boost driver for 445nm
I also had bad experience with one of these drivers ordered from KD.
These two chips almost exploded when I connected driver to dummy load.
But second driver works just great, giving more than 1200mA.
I don't have much experience with RC helicopters. Here is what I ordered few weeks ago on DinoDirect (for 12USD :D )
It worked just fine for 2 days but then helicopter started to loose power. Looks like battery is dying. I tried to replace 140mAh Li-Po battery with 1000mAh Li-Po battery and...
Ahhh, sorry to hear that TTerbo.
Mine died too, but it was my fault. I pushed it to its limits. (600mA)
Looks like these diodes inside are rated to about 500mW maximum and they don't like high currents. I tried to replace IR diode but I couldn't achieve enough green light. 1500mA to diode...
I did many tests and two plastic lenses give the best output power.
And I never noticed any damage to any of lenses.
Two plastic lenses collect more light than one (or two) glass lenses because FL of plastic lenses are a bit shorter than FL of glass lenses.
So, if you need to burn something...