is there some kind of cheap VGA-headset? (solved) - Page 1
Forum section: electronics / general

author: DiTBho
author_rank: Super Contributor
timestamp: February 14, 2024, 03:32:08 pm
content: not a VR-headset, just two wearable screenso not like the Apple Vision/Pro, many more simpler, and cheaper(say, =<300 euro),is there some kind ofVGA-headset, with- resolution of 1024x768-24bit- VGA input (two channels(1))- without { IMU, headphone, other sensors and misc }It's needed to pilot a robotic-rover that must move through a tunnel (long story, don't ask)Kind of wire-guided stuff (POE? Optical-signal + 48V power lines? mumble), which must cost as little as possible(1) I haven't yet understood how to manage two VGA signal to mimic some kind of simplestereoscopic vision, ummas I have two possibilities here:1) installing two cameras on the rover, but those bloody cameras must be water and acid-proof, so ... very expensive2) installing only one camera on the rover, and somehow mimic some kind of stereoscopic vision manipulating the camera output for the two VR headset screens---The rover comes with an IR Lidar 2D, deep-meter, and other (useless, but cool) stuff. So, it doesn't need any true stereoscopic vision.

author: DiTBho
author_rank: Super Contributor
timestamp: February 14, 2024, 03:42:01 pm
content: ... five minutes ago I was tempted to dismantle two 80s video cameras and use their viewfinders in a new wayVery cheap, 40 euro per unit, but ... umm, mini-CRT technology, the same as television before LCDs took over, and driven by a PAL/NTSC signal, so... ~640x480.So, it sounded like an excellent idea only for the first 5 seconds (also because it's too Gibson-style cyperpunk), but then it got rationally abandonedToo heavy, because it's made of glass~1000V doesn't sound a great idea if you have to open the viewfinders and put them near your faceNot enough pixelsPAL to VGA...not a great idea

author: tszaboo
author_rank: Super Contributor
timestamp: February 14, 2024, 03:50:01 pm
content: The search term is "FPV googles". The results are endless, not sure if any of them will have a VGA connector.

author: NiHaoMike
author_rank: Super Contributor
timestamp: February 15, 2024, 12:39:53 pm
content: How about one of those VR headsets that you put a smartphone into?

author: DiTBho
author_rank: Super Contributor
timestamp: February 15, 2024, 06:25:14 pm
content: Quote from: NiHaoMike on February 15, 2024, 12:39:53 pmmm, VGA to smartphone? how?

author: DiTBho
author_rank: Super Contributor
timestamp: February 15, 2024, 06:31:08 pm
content: Today I dismantled part of a decommissioned X-ray machine, of those used by dentists.Umm, the viewfinder is *VERY* interesting because it's an eyepiece LCD with exactly the specs I need.and it is also definitely much lighter than a glass-miniCRT-80-ish-viewfinder!!!So, oh oh oh, with a face padding, and two of them, I could actually make a VGA-headset!But, what the hell, where to buy those viewfinders?Can I use part of a decommissioned X-ray machine?(which in theory is still owned by another company?)I'm tempted, with the complicity of the darkness, to put it in my bag, and that's the end of my many problems.But I am an honest person, so ... I'd like to understand: who did build it, if it's for sale, and if a private being can buy it, how much is it?(I would like to buy at least two, say four, of them)Why life is so complex

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 15, 2024, 09:04:29 pm
content: What for though?

author: DiTBho
author_rank: Super Contributor
timestamp: February 16, 2024, 11:12:35 am
content: Quote from: SiliconWizard on February 15, 2024, 09:04:29 pmwhat(what(what(x))), what(what(what(for though?)))anyway, somehow solved myselfI still don't know which company made(?)/still makes(?) those viewfinders, but a found other four decommissioned x-ray machines, teared down, got a written permission to take all the viewfinders.so I have two 1" mini screens with all the optics already made and assembled, and the input is XVGA@60Hz.Excellent!I think I'll build some polycarbonate supports to mount two viewfinders on a VR-structure; here, I will probably buy something cheap (~50-100 euro) on Amazon, teardown it, and hack it to reuse the frame-structure and make my version, then I'll move on to assembling something wearable, with- Power(1) + VGA, right channel, 9 wires, { R, G, B, H, V, GND, 12V, /en, GND }- Power(1) + VGA, left channel, 9 wires, { R, G, B, H, V, GND, 12V, /en, GND }Then I will have to deal with stereoscopic vision, that is, build a VGA splitter that does not limit itself to replicating the input stream onto two output streams, but which translates the pixels horizontally enough to satisfy the stereoscopic vision so as not to be perceived "annoyance" to those wearing the visor(1) during the teardown, I found the viewfinder used in the x-ray machine has a power enable, which is a common TTL input, the "/en" pin. 5V, negative logic.No problem, short it to GND, and the viewfinder will be always on.