434 réponses à ce sujet

[Mike118]

Pascal you don't understand what we are talking about... For those tiny robots we don't talk about onboard camera... One camera with a raspberry pi can provide an external video feedback for those tiny bots.

[Serveurperso]

I understand, but look this :

[Serveurperso]

fucking tiny !
way smaller than a PI zero !!!
and high quality wide angle picture and better sensitivity than our PI camera !

there is a lot of model and very cheap <15$

[Mike118]

Yes camera is cheap and small but what hardware should we add to have them working on vigibot ? And what latency would we get?

[Serveurperso]

expensive and like radiobot
but after the ground station, each robot cost cheaper than Minus !
robot = arduino + RF receiver + this camera
and you get a (bit) better range than wifi
One robot on vigibit with data broadcast to all robot, and multiple camera selector
this is a new way for research : a 5.8GHz RF video receiver with integrated capture & TBC working on a PI 4

[firened]

i use those fpv cameras on my multicopters
so i couldn't just use a cheap 5.8G downlink receiver connected to a easyCAP usb adaptor?

[Serveurperso]

easyCAP is Time base sensitive, the driver kernel module crash when there is RF noise

[firened]

i only have fpv goggles with video out. but a simple video receiver can be very cheap ~30$

[Serveurperso]

try for reliability at maximum range
just launch capture on a Linux computer, go out of range / in range / out of range -> crash
if there is no crash -> this is a new solution for vigibot

[firened]

oh wow that's weird

[Serveurperso]

but for deinterlace a computer is better, the PI 4 is overloaded
there is hardware deinterlacer like I use on my "Astro" robot with the B/W sensitive camera
I must try the reliability with this one. Cost about 150$ for the capture card. This is not a EasyCAP clone
I don't know if there is an time base correction inside it
A TCB add 1/2 frames more latency....

[firened]

there's also 5.8G USB receivers for android phones. you think they'd be different and not crash a pi?

[Serveurperso]

EasyCAP....
you must test....
A one day testing @ maximum range is good
I do this EasyCAP test on the old-old stable Linux Jessie
Now we must test the Buster driver...
no crash -> I can vigibot it
Put it on a PI 4 and I configure for video....

[firened]

such fpv support could be an interesting optional extension for tiny robots.

[Serveurperso]

and tiny drone !!!
not dangerous, fun, crashproof
perfect for vigibot
(but about 8min battery life)
more 6 min

[Mike118]

Yes but a minus would bring them back on a charging station

[Serveurperso]

lol

[firened]

my small quad has 2-3min
one of the shortest fly times I've ever heard of

[Serveurperso]

outch
bad battery or bad setup
you must go over 5min with a TinyWhoop

[firened]

that's manufacturers specification! it's one of the lowest yes.
it's quite powerful with brushless motors with such a tiny size