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Old Jun 13, 2011, 02:30 PM
Fidler & twidler
empeabee's Avatar
Cranfield U.K.
Joined Mar 2004
4,083 Posts
Quote:
Originally Posted by Isoprop View Post
OK, it's been almost two weeks since you posted your message, and I've been dabbling a bit... felt like writing something for fun...
Lol - hoist on my own petard
Thanks - works a treat, just what this old befuddled mind needed - even the 57 second wait give me time to think what to do next

Is this what you mean by W I B N I ? Maybe even a larger count down?
Larger as in where did I leave my reading glasses or Larger as in I need time to find the paper that tells me what I was doing staring at the screen counting down?
This is a working gimmick, extremely simple, no clock, no user input, just two clicks. I wrote this program to try and get the camera clock synchronized to the second, but I'm still having problems... I think the camera ignores the seconds. I've wasted too much time testing and have given up for the time being - maybe later...
There - you see why dev programmers hate Wouldn't It Be Nice If requests
Thank you. It now lives in royal splendour on my desk top.
Mike
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Last edited by empeabee; Jun 13, 2011 at 02:40 PM.
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Old Jun 13, 2011, 02:37 PM
a.d.m.i.n
reptor's Avatar
Joined Jan 2011
498 Posts
Quote:
Originally Posted by Justin Stuart View Post
Does anyone have a link to a reliable seller who has the latest version of the #11 Jumbo V3 for sale?
Me too need

Quote:
Originally Posted by ROCKY2 View Post
i paid 48 for it not 8 dollars it is a #11 or i wouldent of posted it
Can you please post link from shop(ebay) to this cam?
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Old Jun 13, 2011, 02:47 PM
Registered User
Joined Jun 2011
5 Posts
I just got a #11 camera today from eletoponline365. I tried powering it up and no light. I plugged it into my usb for an hour and it had a red light on. When I unplugged it and tried to turn it on there was still no light again. Also when its plugged into my usb my pc is not recognizing any removable storage or anything. I tried holding the reset for a few seconds, but still nothing. I have a kingston 4gb class 4 SDHC card in it.

Did they just send me a broken camera? Or is there something I can do?
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Old Jun 13, 2011, 03:44 PM
Must not buy more planes!
mclarkson's Avatar
USA, KS, Wichita
Joined Jul 2010
2,396 Posts
Press the button to turn the camera on while it is plugged into the USB on your computer. Does the yellow light come on? Does the computer see the camera?
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Old Jun 13, 2011, 04:42 PM
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USA, CA, San Diego 92120
Joined Oct 2007
3,088 Posts
Tom,
in all your free time ..
could you comment to post 4619 and 4620 above? V/r JimS
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Old Jun 13, 2011, 05:06 PM
Registered User
Joined Jun 2011
5 Posts
Quote:
Originally Posted by mclarkson View Post
Press the button to turn the camera on while it is plugged into the USB on your computer. Does the yellow light come on? Does the computer see the camera?
I tried that it didn't work at first, but then it finally did. Thank you!
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Old Jun 13, 2011, 05:40 PM
TREES!!! Ouch!!!
ROCKY2's Avatar
Mexico, BC
Joined Jun 2009
1,979 Posts
Quote:
Originally Posted by reptor View Post
Me too need



Can you please post link from shop(ebay) to this cam?
ya here you go oops it was $40 my bad http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT
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Old Jun 13, 2011, 06:11 PM
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timetec's Avatar
United Kingdom
Joined Aug 2010
71 Posts
Audio Clipping Problem - Diagnosis and Solution

Hello all

This is a follow-up to post #4371 on page 292 addressing the problems many users have had with 'clipping' audio (sharp clicks and pops) when recording with the 808 #11.
It is caused due to variations in low-frequency air pressure, and is normally encountered in a moving car enviroment or caused by wind (in flight on a RC plane for example).

I'll split this into two posts, starting with a description of the nine pictures shown in the collage attached to this post.

1 This is a diagram of the electret microphone circuit, showing the biasing, decoupling and supply splitting arrangement.
You will notice the very high value of the microphone decoupling capacitor : 1.5uf (circled in red) - this is what we need to change.

2 A close-up of the PCB showing the location of the components depicted in the circuit diagram, figure 1.
These are outlined in the same colours for easy reference / identification.

3 A size comparision of the 1.5uf capacitor against a peppercorn and a grain of sugar.

4 Measuring the value of the audio decoupling capacitor using a digital capacitance meter - coming in at a huge 1.504uf.
This value is excessive in the extreme and will allow very low frequency and sub-sonic audio to be amplified and digitised, causing clipping.

5 & 6 The 1.5uf capacitor was removed and two single wire stands were seperated from an off-cut of hookup wire.
Holding the PVC sleeving, these were then soldered to points A and B (see figure 2), so I could test different values.

7 This shows a test capacitor soldered in place - in this instance, a 470nf was been 'auditioned'.

8 & 9 Showing the finally selected value of 220nf soldered in place on the PCB - plus the addition of a small jumper wire.
I decided to use a phsically larger capacitor than the original type, because I couldn't find one that small and even if I could find one, I wouldn't be able to solder it in place !

In the next post is a description of the test, the different capacitor values tested and the results, plus two videos - before and after.

Richard
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Old Jun 13, 2011, 06:27 PM
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United Kingdom
Joined Aug 2010
71 Posts
All these tests below were performed using a 18Hz Sine Wave signal generator and 50W Subwoofer.
The position of the camera and volume level remained constant throughout each test.

1.0uf No real change - clipping still evident, perhaps not quite as severe.
470nf Good improvement - clipping present but much reduced.
220nf No noticable clipping.
100nf No clipping - starting to loose LF response.
47nf No clipping - little if no LF response - perfect for speech / dictation.
22nf Little midrange and no LF - tinny, 'transistor radio' quality.

So, I settled on 220nf - you could possibly get away with a 470nf, but this largely depends on the enviroment it would be used in.

The two audio clips - 18Hz Sine Wave / close proximity.

The first demonstrates the clipping using the original 1.5uf capacitor as factory fitted.

The second video uses a 220nf surface-mount ceramic capacitor.

#11 808 V3 - Original 1.5uf Audio Decoupling Capacitor - 18Hz Sine (0 min 32 sec)

#11 808 V3 - 220nf Audio Decoupling Capacitor - 18Hz Sine (0 min 18 sec)


Richard
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Old Jun 13, 2011, 07:17 PM
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Joined Jun 2011
4 Posts
Hello everyone, I have the V3 #11 with the firmware, "Continuous Recording & Remove Time". I'm using a Sandisk 16gb class 4 card. I'm using my camera on a motorcycle with the 12V plug. Red LED still lights up to indicate charging and the problem I'm having and I'm hoping someone here can help with, is once the camera records 4gb of film, it shuts off. I does not continue to record until card is full. Isn't the firmware suppose to record 4gb, save, then continue to record? Thank you for your time and help.
Kent
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Old Jun 13, 2011, 07:18 PM
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USA, CA, San Diego 92120
Joined Oct 2007
3,088 Posts
Quote:
Originally Posted by timetec View Post
..
220nf No noticable clipping.

Richard
Dear Dr. 808 AudioSpecialist..
as newly appointed guru.. I must ask: will this mod help reduce the clipping I'm getting when standing in the wind, or talking too loud when shooting from under the Brim of a ball cap?.. if so, what would you charge to do it on a No 11 and replace the battery at the same time? where are you located?

Final question.. what is the impact on the audio clicks and beeps when you install this cap and the camera enters a low voltage threshold.. I'm assuming this Mic mod has no effect on that problem? correct? can you get some BEFORE /AFTER Video of the mod while flying it on a plane (ideally a slope glider?)?
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Old Jun 13, 2011, 07:30 PM
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Joined Jun 2011
3 Posts
Quote:
Originally Posted by jaccies View Post
Where did you get the 2 firmwares from?
I got the firmwares from Techmoan's blog, who claims to have downloaded them from the RC Forums, which is how I found this great thread. The camera is recognized as a webcam when plugged in, can take photographs, but still seems to just freeze up when I try to take video. The light blinks as if it would be recording, but it doesn't, and I keep having to hold down the power button, then tap it repeatedly for it to come back on.

One thing I noticed ... when I power on the camera, it lights up, then the yellow light blinks off for a second, then stays on. Could it possibly be trying to reflash every time I turn it on? I've formatted the memory card since, and tried a brand new memory card, and still got the same thing.
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Old Jun 13, 2011, 07:45 PM
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United States, CA, San Ramon
Joined Apr 2011
96 Posts
Quote:
Originally Posted by superboringjoe View Post
I got the firmwares from Techmoan's blog, who claims to have downloaded them from the RC Forums, which is how I found this great thread.
Someone unfortunately removed the previous firmware from this site which is causing lots of confusion to people who have not read through all the posts in this thread to see why or who have discovered this camera somewhere else on the web and then came here. The firmware on this site is different from that on other sites. Try re-downloading from the link in post 3 and flashing that.
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Old Jun 13, 2011, 08:08 PM
Dance the skies...
Tom Frank's Avatar
United States, MA, Walpole
Joined Dec 2003
17,980 Posts
Quote:
Originally Posted by Justin Stuart View Post
Does anyone have a link to a reliable seller who has the latest version of the #11 Jumbo V3 for sale?
Post #2 in this thread has eight of them!
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Old Jun 13, 2011, 08:16 PM
Dance the skies...
Tom Frank's Avatar
United States, MA, Walpole
Joined Dec 2003
17,980 Posts
Quote:
Originally Posted by jims123 View Post
Tom,
in all your free time ..
could you comment to post 4619 and 4620 above? V/r JimS
If you have a v1 or v2 #11, you have no indication of when the battery is fully charged when charging via the car charger or another external charger with the special plug, unless you are using the emergency charger accerssory, which has it's own charging LED. You can time the charge and go from that but that is not a positive indicator. I guess that's why the v3 was designed.

The use of the timeset.txt file should have no effect on the charging.
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Last edited by Tom Frank; Jun 13, 2011 at 10:09 PM. Reason: added emergency charger info
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