nuckolls.bob(at)aeroelect Guest
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Posted: Wed Oct 18, 2017 6:01 pm Post subject: Constructing an automatic RCA video camera feed splitter |
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At 07:08 PM 10/18/2017, you wrote:
Quote: | --> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com>
I don’t think there’s an impedance problem - the inputs to the video switch IC are digital. So yes, I expect it would work fine to connect multiple pic outputs to one camera select input. You can have a camera that is displayed twice as often (or twice as long) if you really want, by using 2 PIC outputs connecting to one video select input. But you’d have to solder some green wires on the PCB to make it happen.
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Unless the outputs are open collector, active low with pull-up resistor,
they cannot be wire-or'd. They have low impedance paths to either
Vcc or Vdd at all times.
Bob . . .
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