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bobair8(at)msn.com
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 Posted: Mon May 12, 2008 7:14 pm Post subject: 14 VDC Power Cord for Digital Video Camera? |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Folks,
I have a new digital video camera (Canon FS-11) that I want to rig up in the cabin of my GlaStar for its test flight program. I intend to use a patch cord to connect my intercom with the "Mic In" function on the camera so I can dictate information to the video instead of having to write it down. I'd also like to power the camera from ship's power but Canon doesn't sell a "car cord" for this camera. The Canon tech rep says the camera is sensitive to its input voltage (8.4 VDC) from the output of the 110 VAC power converter.
I don't want the extra wires and weight of an inverter -- I'd rather make up my own power cord to plug directly from ship's power to the camera. I can put a resistor in to drop the voltage but I'm worried about spikes and their possible adverse effects on the camera. Is there a circuit that would regulate the output close to 8.4 VDC with the expected input voltages from ship's power?
(FYI, the compact power adapter is Canon P/N CA-590 and its input specs are 100 - 240 VAC at 50/60 Hz drawing 0.14 - 0.08 Amps with output at 8.4 VDC at 0.6 Amps. The tech rep wouldn't/couldn't tell me the tolerance on the input voltage to the camera.)
Should I put in a smaller capacity (1 Amp) fuse instead of the 5 Amp fuse I've got in there now?
Bob
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zk-vii(at)rvproject.gen.n
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| Posted: Mon May 12, 2008 7:48 pm Post subject: 14 VDC Power Cord for Digital Video Camera? |
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Hi Bob,
I've just been through this with ours, although we are a RV7A and I'm using older MV400i DV Canon tape technology. I actually made a small switched power supply board - the primary problem was finding the power cord plug, In the end I went lo-tech and used a larger battery! The battery lasts 2 hours, the tape media lasts 1.5 hours and most flight tests were less than an hour. I added a 3.5mm jack to jack which was connected to the stereo headphone lines from the Garmin 340 - although I did need to add a couple of resitors to attenuate the volume down a bit. The video recorder tended to auto-gain on the audio and struggled with over loading - but for the purposes needed it worked fine.
The footage came out ok ( see http://www.youtube.com/zkvii ) and the learning aspect of reviewing your flying was much more benefical than I had expected - things like cockpit resourcing, radio calls, checks all can be critically reviewed later.
Regards,
Carl
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Carl Morgan - ZK-VII - RV 7A
http://www.rvproject.gen.nz/
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