8802AJ Wireless Inspection Camera

N

N_Cook

Guest
no name maker, but like this one
http://kgbcameras.co.uk/cameras/0Brand_1_19_1226538224.jpg

I cannot get the 2.4GHz link working, works wired in , clipped together.
Anyone know what the secret is ?

The camera is outputting syncs only , rather than CVBS is the main problem,
anyone know if there is a secret way in ? I suspect as supposed to be
waterproof , then a matter of hacking in.
It would be much more useful with a clipped on close-up lens, for reading
script, surprisingly not supplied
 
N_Cook <diverse@tcp.co.uk> wrote in message
news:hvva93$bci$1@news.eternal-september.org...
no name maker, but like this one
http://kgbcameras.co.uk/cameras/0Brand_1_19_1226538224.jpg

I cannot get the 2.4GHz link working, works wired in , clipped together.
Anyone know what the secret is ?

The camera is outputting syncs only , rather than CVBS is the main
problem,
anyone know if there is a secret way in ? I suspect as supposed to be
waterproof , then a matter of hacking in.
It would be much more useful with a clipped on close-up lens, for reading
script, surprisingly not supplied
Click to expand...
Convinced myself hacking-in only.
I hacked in along the mould line and accessed the inside without further
damage. 22 way bridge between CCD plus 2x LED and rest of pcb, maybe
fudgeable for miniture 7x7x10 lens and ccd . Whole ,with current pcb, could
be easily cut down to 12x 7mm access port instead of 16mm original. Anyone
knows of a simple "elephant trunk" mechanical manipulator mechanism? very
stiff and unweildy spiral steel trunking umbilical as is.

uses wbcam type lens and CCD and Vimicro 44 pin
VC0703NLEB
cant get any closer than
http://www.vimicro.com/english/product/d_vc0703.htm#
also 8 pin u724
6M xtal
outputs CVBS with 3.3V supply
 
From this odd named file
http://www.sh2a.com/Microsoft%20Word%20-%202A-cmos.pdf
and pins 1,2,3,4, 7 tied to Vss and p8 Vdd , then the 8 pinner marked
U274
16B-1
probably an EEPROM but why ? NTSC/PAL selection would surely be just taking
some pin high or low on the 48 pinner. Contrast and brightness carried i2c
to the front end? will check later today
 
N_Cook wrote:
From this odd named file
http://www.sh2a.com/Microsoft%20Word%20-%202A-cmos.pdf
and pins 1,2,3,4, 7 tied to Vss and p8 Vdd , then the 8 pinner marked
U274
16B-1
probably an EEPROM but why ? NTSC/PAL selection would surely be just taking
some pin high or low on the 48 pinner. Contrast and brightness carried i2c
to the front end? will check later today



That PDF is for a USB camera which would need VID and PID info from
Click to expand...
somewhere, hence the EEPROM. Your one's VIMICRO VC0703 chip is
configurable for a lot more than just PAL/NTSC. I would expect the OSD
feature alone to need an EEPROM to store the text and the rest of the
config might as well be kept in the same chip.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL:
 
IanM <look.in.my.sig@totally.invalid> wrote in message
news:i022u4$2ree$1@energise.enta.net...
N_Cook wrote:
From this odd named file
http://www.sh2a.com/Microsoft%20Word%20-%202A-cmos.pdf
and pins 1,2,3,4, 7 tied to Vss and p8 Vdd , then the 8 pinner marked
U274
16B-1
probably an EEPROM but why ? NTSC/PAL selection would surely be just
taking
some pin high or low on the 48 pinner. Contrast and brightness carried
i2c
to the front end? will check later today



That PDF is for a USB camera which would need VID and PID info from
somewhere, hence the EEPROM. Your one's VIMICRO VC0703 chip is
configurable for a lot more than just PAL/NTSC. I would expect the OSD
feature alone to need an EEPROM to store the text and the rest of the
config might as well be kept in the same chip.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL:
Click to expand...

there is only 4 wires between this camera pcb , down the 1m long spiral
trunking to the monitor etc, 0,3.3V, illumination LED supply (variable), and
CVBS signal out.
 
Repaired another of thse endoscope things, just mechanical damage to the
metal barrel surrounded "S video" connectors used as small polarised 4 way
connections. Sticking a 20D/ 50 mm focal length lens over the lens cover
means you can focus down to a conventional 16 pin DIL package to read
script. Image is then linear x2 so fills the height of the LCD screen.

If you were to cut away the waterproof lens cover and picked at the weak
glue around the LEDs and lens carrier you could unscrew it , web cam
fashion, to focus closer.
Anyway given up on this one , come to conclusion half the vimicro is kaput.
Annoyingly about 40 MHz clock and 9 output lines from the CCD work with
plenty of signal variation to content of view variation. But CVBS output is
corrupt , absolutely no image content. There are 3 sync pulses and 2 colour
bursts per line interval. Tried removing EEPROM as no clock burst , just
apparently matching L to H with 2 or 3 negative pulses only, then staying
high, on (presumably) SDA and SCK pins. Removed EEPROM and same signal on
vimicro pins , but then no o/p signal at all. Replaced with an as found
24C04 and same nothing out.
Probably too much of a workup to descramble those 9 lines to give even just
a monochrome image
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top