the voltage does not change much from fully loaded to uploaded. It is well regulated with excellent filtering. To power this second install, used a 12 VDC regulated wall wart (light weight - no transformer) from a Linksys router. The gain settings are different on both cameras, but still well within usable ranges. Individual camera gain settings make up for any loss. The overall gain is a bit less, but more than adequate on both cameras. The camera inputs (audio) are connected in parallel using one Micorseven mic output. One wide view and one closeup of the same view. The second setup requires that two cameras use one mic as both cameras are within 18 inches of each other. The current at 17 VDC is a little over 1 mA (1000 microamps). Works perfectly with no RF interference or hum. Used 20 feet of shielded wire to connect the mic output audio to the 2831. Required a separate pair of wires for the mic DC line which were in place for another application.Īt no load, the output voltage is in the 16 to 17 DC volt range. The wall wart is of the old design with no regulation but with good filtering. Installed on the 2831 using a 9 VDC at 350 mA small transformer (heavy) type of wall wart. The mic works well on both and is very sensitive. Tested a Micorseven M7WP microphone ($22.00 USD) for use with a Dahua 52 bullet cameras. Hopefully this helps someone else as well. In my testing I have had no sound issues from the microphone and the camera seems very happy as well. I had to make a short cable to go from the splitter to the camera but this splitter successfully powers my camera and the microphone. It continues to provide power through the Ethernet cable that connects to the camera while splitting off a 12V 1 Amp barrel connector for use by the microphone. I ended up finding a solution on this forum with the following splitter Tycon Power Systems - POE-MSPLT-4812P-F. I did not want to run another cable just to supply power to the microphone and I also didn't want to hack my way to a solution. One of the POE injectors managed to provide enough power to get it to start up, but it would never finish booting. I did lots of testing even using 2 different POE injectors other than the switch to see if there was any resolution. So the camera wasn't getting enough power. The camera would light up temporarily (less than one second) and then shutdown and keep repeating this. After they arrived, I used the POE splitter, and then the barrel splitter that comes with it to connect power to both the camera and the mic. I have two TL- SG2210MP switches to do the POE portion so I ordered the mic and the POE spliter think that would work just fine. Using a line in mic was a new experience and I had a couple of trial and errors before finding this thread. Prior to this point I was using Cube Cameras that had built in microphones but due to where I have moved to, they were no longer adequate for some of my needs. I just bought several Hikvision DS-2CD2665G1-IZS cameras to upgrade my camera system.
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