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int0

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  1. Hello- I have a chronic litterer dumping garbage at the end of my driveway, which is 1/4 mile from my house. I've set up a couple cameras and managed to catch them in the act, but only with IR video. I can't tell the color of the car or the license plate. With daylight, I can use my regular video camera to zoom in at plate level and capture the plates at high speed with 1/1000 shutter speed. But this camera does not have IR. I have a Hikvision DS-2CD2142FWD-I, just a value series dome camera. I set this up on my mailbox, and it works great except of course it can not read license plates at night, even with high shutter speed (1/1000 or 1/2000). Before I go and spend over $1000 on a dedicated LPR camera, I was hoping I could get a few recommendations for a camera similar to this Hikvision that allows me to zoom (optical) in on the license plate area. Maybe that would allow me to capture the plates at night. I do not have any cabling between the house and the location at this time, so the camera would also need to have the option to record directly to SD card. I have a batter for power. If anyone has any suggestions, it would be greatly appreciated. Also, I am looking for LPR camera system suggestions if this won't work. I can mount the camera on my mailbox, but I need to capture a car moving at 55 MPH during the night. Thanks!
  2. Thanks. I think my safest bet is to wire each camera separately, I have enough wire and old power supplies to handle that, and I think I can just get a voltage regulator for each one to make sure I only have 12 volts at the camera.
  3. 2Vdc voltage drop for a single camera tells me it actually only uses about 0.5amps - hence the 1A camera requirement (you can measure that too). You could probably get away with 2A supply after all and even a 16Vdc supply since it looks like you'll be dropping about 4v total. Ideally, you would select a DC power supply at the source that would provide the ~12Vdc at the required 2-camera load so no special conversions needed. I have a extra laptop power supply lying around, rated for 20VDC and 11A. I think I will try using that, although I am guessing I will need to step down the voltage anyway. Thanks for the help!
  4. You're right in expecting a larger voltage drop. I suspect you made the measurements without the load? (cameras powered @ 1A each). Attach both cameras and measure again. You'll probably find you need an 18-24DC power supply to get that 12Vdc at the other end. Also, if both cameras require 2A, best to go with at least 3A. A supply with at least 4A or more is better. Ok, I tested with 1 camera on, and voltage was down to 10.25 with the infrared lights on. I believe that's a little too low for recommended use. If I use an 18-24DC power supply, can I hook that up directly or do I need some sort of converter on the other end?
  5. Hello- I recently purchases 2 security cameras. I need to place them approximately 300' from the nearest power source. I took a 12VDC power supply with 2A output and measured the voltage, and it was 12.25. I then spliced in 300' of 18 gauge twisted cable between the ends. I then measured the voltage again and was suprised to see it barely dropped, it was reading 12.23. So here are my questions: 1. Does this seem legitimate to run 300' with barely any voltage drop? If so, I wonder how far I could push it? 2. Is there a drop in amps over the distance? 3. Can I daisy chain the power to these 2 cameras? The cameras require at least 1A and the power supply is 2A. 4. Is there any risk of fire or damage to the camera with this setup? I assumed that as long as my voltage drop wasn't too great, it wouldn't be a big deal, but I don't know alot about these things. Thanks for any help.
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