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!… Read more...
My favorite VTX antenna is the Aomway 4-leaf cloverleaf (sometimes referred to as a skew planar, but “cloverleaf” actually comes from it’s radiation pattern resembling a four leaf cloverleaf!)
They are cheap, work well, and are the most rugged out of the cheapies.… Read more...
Apart from measuring regular capacitor and inductor parts, an LC100-A LC meter can be handy tool for measuring the inductance of your mini-quad motor windings, to determine if a particular motor has shorted turns or not.
To make the LC100 a bit more work bench friendly, a few modifications have been implemented.… 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 broken off leg to the other side of the PCB.… 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.… Read more...
One momentary switch not enough on your Taranis radio?
It’s very straightforward to fit different switches to the Taranis to suit your own requirements.
First, undo the Philips heads screws and separate the case:
I use switch SG as a 3-way centre off to reset timers 1 and 2, and a conventional toggle switch is just annoying.… Read more...
This modification was inspired by an article on BoltRC’s blog about replacing the Taranis’ in-built antenna with an SMA jack, which then allows connecting different, higher gain, antennas.
With the BoltRC mod, I didn’t like the idea of hot melt glue holding the SMA connector in place, and the method documented below has the SMA jack rigidly mounted through the radio’s shell.… 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.… 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.… Read more...
I’m not exactly sure how this happened, it wasn’t a propeller, but one of the ZTW 12A ESCs was nicked by something as it struck a tree.
Comparing it to another ESC (which has some blown FETs on it), this managed to dislodge no less than 7 small SMD parts off the PCB, 3 ceramic bypass caps, and 4 resistors.… 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.… Read more...
Ripped the SMA antenna connector off your EzUHF receiver in a crash?
It probably looks like this on the solder side:
Components side:
Whilst the SMA jack fitted on this receiver has a narrow body, all is not lost, as you can most likely fit a wide body SMA jack in its place:
When purchasing PCB mount SMA “end launch” style connectors, be aware of the PCB thickness the connector is designed for.… 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 haven’t taken yours apart yet, something to be aware of when re-assembling:
Watch out for the wires, and make sure you don’t pinch the wires with the screw post on the other shell half.… Read more...
Eltek FLATPACK2 Volts Setter
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Eltek FLATPACK2 24/48V Touchscreen Controller Kit
$145.00 AUD
Genuine OEM Belt Clip for Anytone AT-D878UV & AT-D868UV - 3 Pack
$21.00 AUD
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