Does the Vivitar 120 Led Light Panel For Digital Camera And Camcorder - Viv-Vl-900 work on a NIkon D5000?

SOURCE: Vivitar 283 with new Nikon Digital camera

the nikon D80 has a 250 volts safe range and i have the same issue but readin on the internet i learned that yo can now the voltage of your flash with a voltage metter ond the hot soe.

Vivitar 283 has diferent ranges of voltages depending on the year of fabrication so older ones can achieve 300 volts and earlier have 230 volts so the best is to get a vivitar 285hv for about 75dollars or a safe sync for about 55dollars, you can find all on ebay or other brouser the safe sync converts up to 400 volts to a safe 6 volts that are yust the normal voltage for digital flashes.

SOURCE: Nikon D80. Vivitar 4600 Flash unit

That particular unit is probably not a good choice for the D80 because the trigger voltage (the electricity which flows from the flash through the camera circuits to fire the flash) is 19.5 volts, according to http://www.botzilla.com/photo/strobeVolts.html - this could possibly damage your camera electronics.

You don't have to stick with Nikon brand Speedlights, but get a modern flash which says it is I-TTL compatible for Nikon.

SOURCE: can you use a vivitar 285 flash with a nikon D90 ,

You can use the 285 with the D90, just don't do it without something isolating the two to prevent the trigger voltage from frying the D90. You can use something like the Wein Safe Sync
( http://www.weinproducts.com/safesyncs.htm ) for this.

As for an off-camera cord, you can use something like the Nikon
SC-29 ( http://shop.nikonusa.com/store/nikonusa/en_US/pd/productID.213505500 )

SOURCE: Is Vivitar 2000 Electronic Flash compatible with

Well I found the Vivitar 2000 auto in a thrift store, and it seems to work perfect with my Nikon D5000.

SOURCE: Vivitar 283 on a digitial camera?

It depends on the variant of the 283. Take a look here.