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Do I need a relay for my normally open circuit?
Sorry getting video terms mixed in there... when I said switcher above, I was refering to a device that switches video signals - basically I take the video signal from camera 1,2,3 and then I can select which one I want to record and output that to tape. Basically the switcher tally is a device...- Kit333
- Post #7
- Forum: Circuit design
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Do I need a relay for my normally open circuit?
Ok, after doing some research I think I understand the correct way to connect the transistor. The Base would be connected to the switcher tally and to the C side of the transistor. The C side would then also be connected to the transmitter and the power and then to the E side. All that...- Kit333
- Post #5
- Forum: Circuit design
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Do I need a relay for my normally open circuit?
Hi Rich, You bring up some good points, first on the old camera equipment I don't have the schematics for them - they were installed long before I got there. They must be powered from the cameras, if I take the leads from the tally light and connect them together the light turns on (on the...- Kit333
- Post #4
- Forum: Circuit design
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Do I need a relay for my normally open circuit?
Update.... Ok I got my relay to work by testing it with two AA batteries and when I apply voltage across the coil I can get the light to turn on. The problem I think I'm going to have is that on the switcher that will be connected to the transmitter I believe that it is a dry contact closure -...- Kit333
- Post #2
- Forum: Circuit design
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Do I need a relay for my normally open circuit?
Hello, I think the easiest way to describe my question is to give you the application for this first. I work for a small TV station and we are replacing our large studio cameras with new cheaper DV cameras. On the new DV cameras they do not have tally lights (the red light on the top of the...- Kit333
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- Replies: 10
- Forum: Circuit design
