Electronics | Amateur radio | Nerdy Stuff
I was curious about how much bigger a 3.3 GHz cloverleaf antenna would be, compared to a 5.8 GHz antenna, to see if it was a viable alternative for FPV downlinks on 250 class mini quad.
So, I converted a broken 5.8 GHz Aomway to 3.3 GHz, as half the work was already done! 🙂
Side by side, and you … Read more...
Board cameras used in FPV applications can be quite vulnerable, and sooner or later, through-hole leaded components can fatigue and break off with vibrations.
One of the most fragile components is the crystal.
(Standard designator for a crystal is ‘Y’)
This crystal, with one broken leg, will be moved to the other side of the PCB:
Move the … Read more...
A “how to” build video for the FPV Camera Shield, so you can bang a set of five of these out in about 15 minutes.
Previously described:
https://vk4ghz.com/the-0-06-fpv-camera-protector-shield/
🙂… Read more...
Another FPV camera died today, and it will be the last open board camera I fit… they are just too vulnerable.
Replacing the dead Effio-V 800TVL is another Effio-V 800TVL, but the variant that comes in a housing:
An Effio-V board camera weighs 15g, the version in the housing weighs 22g.
I couldn’t care less about 7g more.
It’s … Read more...
The DC input socket on this RX-LCD5802 7″ 5.8 GHz diversity monitor had become loose, as I discovered when attempting to charge it one day.
Aside from feeling “not quite right”, you could wiggle the charge plug around a bit and see the red charge light go off and on.
In hindsight, my external DC power cable I … Read more...
What were the Headplay design engineers thinking???
The Headplay HD 7″ Headset picture looks absolutely stunning when fed with a HDMI source, but the lack of clearance with the connector shroud makes it impossible to use many of the common mini HDMI leads out there.
You’re going to need a mini HDMI plug within a very small molded body, and … Read more...
If you normally need to wear glasses, then rest assured, this is no problem with the Headplay HD 7″ headset.
Picture are worth 1,000 words.
It’s much easier to insert the glasses first, then put the whole thing up to your face, whilst putting the head strap over your head.
Temples slot in nicely between the foam padding pieces.… Read more...
Took delivery of a Headplay HD FPV headset, and not along after, took it apart.
As you do!
To help with splitting the two halves, hold the switch panel down with a finger or thumb whilst you separate the halves:
Inside – you can see the slot where the fresnel lens sits, halfway back towards the rear:
If you’re wearing a FPV headset, goggles, or perhaps have a ground station being powered off a lipo battery you’ll want a low volts warning, but not a loud ear-splitting alarm going off right next to your ear!
Based on low cost low volts alarm from Hobby King, here’s an easy solution.
It simply involves removing one of the piezo … Read more...
Displaying RSSI on the micro MinimOSD can be achieved without adding the extra wire between it and the FrSky D4R II receiver’s signal pin 2 (used in CPPM mode).
It’s not hard to add the wire, but if the micro MinimOSD is already installed, wired up, and encapsulated in heat shrink, it’s a pain!
There is a more elegant solution, … Read more...
Here we take a look inside the FR632 5.8 GHz diversity 32 Channel Auto Scan LCD A/V Receiver obtained from the Hobby King AU Warehouse for just under AUD$75.
Described as:
First impressions: this is extremely well made.
The soldering nor SMD component placement cannot be faulted, and on a good quality printed circuit board.
Real … Read more...
It appears to be a common problem – the Xiaomi Yi action camera’s lens has been incorrectly preset in the factory.
I’m guessing the Chinese assembly workers set the focus on something no further than ~ 50cm within their own workstation space.
The focus should be set on something much further away.
This is easy to rectify, once you have … Read more...
To increase 5.8 GHz FPV range and minimise receiver dropouts, a broadband microwave LNA (Low Noise Amplifier) is assembled and tested.
Whilst you could use a gain antenna like a helix, or quad patch antenna, extra antenna gain comes at the tradeoff of directivity.
The object here is keep using omni directional antnnas, whilst achieving more receiver gain.
EBayer … Read more...
Micro MinimOSD is a tiny On-Screen Display board that works with the Naze32 flight controller and came from Buzz Hobbies in Perth.
First thing to do was solder up Video In, GND, and Video Out wires up to the solder pads with some hookup wire.
For easy pin identification later, header connector was labeled ‘D T R + … Read more...
Genuine OEM Belt Clip for Anytone AT-D878UV & AT-D868UV - 3 Pack
$21.00 AUD
Eltek Flatpack2 24/48V Touchscreen Controller Kit
$145.00 AUD
YK04 Remote Control Kit
$30.00 AUD
K3NG Universal Rotator Controller Kit
$109.00 AUD
K3NG Universal Remote i2c Starter Kit
$20.00 AUD
