Hotshoe flash converter

Here you find a design that can be used to connect old fashioned flashes to modern camera's. The old flashes normally have very high voltages on their connectors (about 300VDC) and the modern camera's do not like that that much.. With this self-powered converter you can use the old flash on your new camera without demolishing it. The circuit is self-powered and is easy to build. With a small addition you can also use it as a slave-flash unit, in case you have no connection for an external flash on your camera.