Switchers

A switcher switches back and forth between cameras. It can be either mechanical or electronic. The mechanical type is simply a switch, just like the push button switch on an old washing machine. The electronic type looks similar to the mechanical type, but does its switching electronically. The mechanical type is cheaper and tends to have transition glitches, like a moment of blue screen or a roll. The electronic type does a better job of switching for more money.

Electronic (New find, great price. But will it work? Can we recommend? Please leave comments!)

Mechanical

Click for larger imageIf you are willing to put up with torn images and blue screens during scene switches, you can go with a mechanical switcher. Pelco model MS504DT is one.

Sequential Switcher

In the security camera world, the electronic switcher is known as a sequential switcher. And, not all sequential switchers will work for webcasting. A sequential switcher is designed to automatically go from camera to camera while some poor guy just sits there and looks at the ever changing monitor. The sequential switcher must have push button switches to go from camera to camera and the ability not to sequence or write titles on each screen to be of use for webcasting. Pelco model VA6104 has these qualities.

DIY Solution

If you just have two cameras, you can build a mechanical switcher from parts available from Radio Shack. Remember it will not perform like an electronic switcher, but it will outperform the commercial mechanical switchers because it is faster. Why is it faster? Think of a clunky washing machine switch with all its levers verses a simple rocker switch. Also, you get to use one balun instead of two. You can use a toggle switch if you have the box secured where the operator won't be pushing it around on the table. Here is a simple schematic of how to wire the DPDT switch.