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hkocznar 07/07/2020
Latency, Useability, Image quality checked: Alright, this is a preliminary review, I'll need to spend more time. + The goggle comes perfectly well packed, reading the manual pages is a good idea because the menu buttons are simple but you need to know how to use them. ~ It comes without antennas, you need normal SMA antennas. - The lenses are too small, they are nice adjustable for almost any head and eyesight but they are tiny. This means that the sweetspot to view the screen is also too small, you can not really view all of the screen without distortions. They should learn from Oculus and HTC-Vive in that regard. ~ Screen quality is interesting, I come from the EV800D and the FOV there is larger (zoomed in). The colors are more aggressive, they are sharper but also flickery. The cheap EV800d had a smoother image at a lower resolution. + The battery pack is great, mounted on back of the head and well designed The big topic, all of the internet is full with negative headlines on the huge latency of the EV300D .. I was very sceptical about my purchase so that's the first thing I checked. I did NOT update firmware so it should be the 80ms latency everyone whines about. 80ms is quite high for FPV but how much does it matter ? Some science about latency: Human reaction time is in average 215ms, my reaction time is around 195ms, most young talents will have a time of 170+ms. The fastest possible conscious time is said to be 150ms and reflex time without conscious thought is around 80ms Our eye is faster than our reaction, 25fps appears perfectly smooth to our eye (that's 40ms delay between pictures) I did a reality test, I put on the Googles and switched on a Quad, then I moved my hand quickly back and forth. I was not able to notice a delay, my brain felt "normal" seeing my hand move. Conclusion: While the latency issue is a setback, you are unlikely to notice it without the use of special testing equipment. I doubt you can notice anything in flight
Eachine EV300D 1280*960 5.8G 72CH Dual True Diversity FPV Goggles Built-in DVR Focal Length Adjustable With Chargeable Battery Case
US$377.99 US$598.39
3
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Hannes 19/07/2022
First of all: if you land it even a little bit hard (not to speak of a crash) the video will drop out and you need to cycle power manually. So no way to recover a crash, even a normal landing on hard floor does it. Second is temperatures .. you better fly direclty after connecting the battery. This thing is going to melt within a minute.
Happymodel Mobula7 HDZero 75mm 2-3S Whoop FPV Racing Drone BNF w/ELRS Receiver RunCam Nano HDZero Camera
US$230.99 US$219.99
0
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Hannes 02/02/2022
It's a quite perfect gift for someone or yourself to start into FPV drones. The quality is fine, the price is quite low for all the stuff included. Though I do have a few negative points: 1) Only ONE battery is included, at least 2 better 3 should be included for a minimal start 2) No description of the remote control keys/levers is included, a beginner is hopeless to understand some of them 3) The Tinyhawk motor connectors are known to become bad, motors should be soldered on and pilots need to know that this is the likely reason if one motor does not start up anymore. And still, the overall value for money is good. Probably one of the best investments if you have nothing and would like to give it a shot. Once ready you can start upgrading, getting better goggles, a better remote, a longer range receiver etc. You can take it slow and replace one by one as you improve (or just stick with the set and have fun)
Emax Tinyhawk Indoor FPV Racing Drone BNF RTF F4 4in1 3A 15000KV 37CH 25mW 600TVL VTX 1S
US$100.79 US$141.99
0
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Hannes 02/02/2022
A nice tiny stepdown converter for almost no cost
10Pcs Mini DC Adjustable Power Supply Buck Module Step Down Module
US$4.99 US$11.99
0
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Hannes 02/02/2022
It really looks nice, a cute compact tiny power supply.
Geekcreit® AC 100-240V to DC 12V 5A 60W Switching Power Supply Module Driver Adapter LED Strip Light
US$4.39 US$11.99
0
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Adult Underwater Sea Scooter Electric Surfboard with 12AH 3200W 36V Battery LCD Display 2 Modes Propeller Diving Equipment Suitable for Swimming
US$829.99 US$977.99

Q: 3.6kw power for 1-2 hours with a 12AH 36V battery. At that power the battery will be empty in 3-5 minutes, not in 60-120. So something here does not match up at all ....

Asked by Hannes on 2021-06-09 10:36:52

Djninjac working time is 60-120 minutes（12AH）

2021-06-24 09:01:48 Helpful (1)
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hkocznar 17/06/2020
I'm a bit torn in half, I ordered 2 of the 70 MHZ versions and they arrived in very short time. Bad #1: Though they both arrived with empty lithium cells, likely all 4 batteries are chemical damaged. I'll need to find out how badly. Bad #2: There is not even a single sheet if instructions, no precision sheet, no manual, no first use sheet nothing. What's the difficulty to sit down for a few hours and write up a short manual ?? Bad #3: I have bought many oscilloscopes from 30$ up to 2000$ and I've never in my life had an oscilloscope come with less probes than it has channels. This one comes with only one probe, I checked and it indeed is sold like that.. That doesn't make it better. Bad #4: In the middle of my first test it just shut down, losing all settings and configurations I made. It was hooked on USB power and I did not let it idle. I hope it's a one time thing and not a defect. Bad #5: The menus are not too intuitive, not a big problem and probably you can get used to it quickly. Those bad points summed up means the manufacturer neglects the device and it's customers in a way I don't like. If the manufacturer put a bit love into this product, delivered it with instructions, 2 probes and the batteries either blocked (a plastic strip) or not empty I'd give this solid 5 stars. The good news: #1 It feels like quality, it is heavy and seems durable. #2 I've tested the scope a little bit, while the controls are not very intuitive it seems working well. #3 The DMM multimeter menu is not the most intuitive one but it's fine #4 The DMM reacts quick and it seems to have great precision, better than my two 250$ multimeters here (tested only DC V). # The materials you receive are of good quality, the 2 BNC crokodile clamps are fine, the test leads are great and of very low resistance and the ONE probe seems to be of good quality either. Funfact: There was an instruction manual with the scope but it's for the probe. Finally: The price is very low: buy it
Hantek 3in1 Digital Oscilloscope+Waveform Generator+Multimeter Portable USB 2 Channels 40mhz 70mhz LCD Display Test Meter Tools Ultra-low Power Design With Large-capacity lithium Battery One-key AUTO
US$127.99 US$299.99
3
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hkocznar 28/05/2020
This was unexpected, that drone is very good for it's tiny price ! The delivery took a month instead of 10-15 days! I ordered two, one from China one from US to Europe. The chinese one arrived first. The drone has about 3 minutes flight time, wifi camera, app control, aceptable image quality and more or less functional altitude hold. You don't need to use the remote control, just use the iphone/android app instead. This makes it ultra-portable. It comes with replacement props and a charging cable. I expected a trash product and was surprised by a quality I've not seen below 50 USD pricetag. Fully recommended, at just 15 USD you can hardly make a mistake.
JJRC H49 SOL Ultrathin Wifi FPV Selfie Drone 720P Camera Auto Foldable Arm Altitude Hold RC Quadcopter RTF
US$19.99 US$23.99
1
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hkocznar 23/06/2020
They seem to be good batteries, on the homepage you've a couple of benchmarks and efficiency tests with different setups and props. Not every motor is well documented. This one is, that's why I chose them. The only downside is the huge overpricing on small motors, they cost 10+$ which is really alot when you look at conventional motors much bigger in size that cost 1$. All the brushless motors are overpriced so I only reduce one star from value.
GEPRC SPEEDX GR1103 8000KV 2-3S 10000KV 1-3S FPV Racing Brushless Motor for RC Drone
US$14.44 US$20.99
1
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hkocznar 03/07/2020
This is, by far, the greatest mobile soldering iron I've ever tried. I am working with electronics for a long time now and this thing is amazing. Yes it's without battery and yes you might need a bit of knowledge to tinker a power source but damn this thing is built great .. Officially it takes 10 seconds for 300 deg Celsius, it feels like nearly instant. And I just used it on a 4S LIPO battery, it supports 6S which would be again 30% faster. The only downside is that you don't get a case for it and the connector plug is also not included, so if you don't have a fitting connector (you can salvage it from many old cables) it might be a bit of a hassle upfront. Conclusion: Full recommendation ! Buy this, you'll love it
Digital LCD Prgramable Solder Iron Station Built-in Acceleration Sensors with STM32 Chip Embedded Interface DC 5525
US$55.61 US$69.56
1
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iFlight Nazgul5 227mm 6S 5 Inch FPV Racing Drone BNF/PNP SucceX-E F4 Caddx Ratel / RaceCam R1 Cam 45A BLheli_S ESC 2207 1800KV Motor
US$239.99 US$263.99

Q: On the iflight website the quad does not exist, no support for it. Is there any inofficial manual and why is the company not supporting it ?

Asked by hkocznar on 2020-06-26 04:30:24

Braindog Look on the iflight store for xl series. its listed as nazgul xl5 and if u need the wirering diagramm go under electronics for the f4 stack. in the description is the diagram

2020-06-27 06:10:42 Helpful (1)
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hkocznar 15/06/2020
Like many others I though I buy the motor, the price is enough for a full motor. I got 2 Rotors instead of 2 Motors. I have to admit that the article is quite well described but given the price I didn't expect that it's not a full motor. So I'm quite unhappy with that one.
iFlight XING 2207 1700KV 1800KV 2450KV 2750KV Brushless Motor Rotor for RC Drone FPV Racing
US$16.79 US$19.99
0
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hkocznar 07/06/2020
I've ordered a range of premade quadcopters and this one is, by far, the best. It has high power, comes with replacement parts and is generally of high quality. The drone has great punch, it comes preconfigured properly for the receiver, it's sturdy (with slight vibrations). At that cost you can hardly make an error.
GEPRC PHANTOM Toothpick Freestyle 125mm 2-3S FPV Racing Drone BNF/PNP F4 OSD 12A ESC 1103 Motor IRC Tramp
US$159.99 US$183.99
0
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hkocznar 07/06/2020
A nice frame for that small cost.
GEPRC GEP-PT PHANTOM Toothpick Freestyle 125mm 2.5 Inch FPV Racing Frame Kit 13.7g
US$18.92 US$28.99
0
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hkocznar 29/05/2020
It comes well packed but there is not even a single sheet with industructions available. No information on flightcontroller pin mapping or instructions on how to set it up. Aside of that, the delivery was quick (I got it in ~5 days from a nearby warehouse) and the price is great. Everything seems to work.
iFlight Nazgul5 227mm 6S 5 Inch FPV Racing Drone BNF/PNP SucceX-E F4 Caddx Ratel / RaceCam R1 Cam 45A BLheli_S ESC 2207 1800KV Motor
US$239.99 US$263.99
0
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hkocznar 26/05/2020
Let's start with the good: 1) It comes with 2 antennas, one directional one omnidirectional 2) It's light on your head and barely any sunlight enters from the sides 3) I have -5/-6 prescription on my eyes (quite near sighted) but the optics are percectly fine without glasses, that was a surprise 4) It came with a EU adapter for power, it has a built in LIPO The not so good: 1) The FOV is tiny, I expected more. Having owned a couple VR goggles, those are faaaaar away in terms of field of view. It's more like having a tablet infront of you. 2) No glasses fit, it looks like you can fit them but the entry hole is quite small I wish I knew how the slim glasses in that price range work, I didn't expect that I don't need to wear contacts or glasses to use it. That's why I ordered that bulky version. Well glasses don't fit, surprise, but they are not needed. surprise again.
Eachine EV800D 5.8G 40CH Diversity FPV Goggles 5 Inch 800*480 Video Headset HD DVR Build in Battery
US$105.99 US$140.39
0
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