I have decided to "open source" my Ghostmaster invention. The Ghostmaster is a flash fire control system for leaf shutter cameras. The circuit provides for electronic flash synchronization at shutter opening or closing, or a combination of both with two separate optically isolated channels. Powered by its own internal 9V battery, the Ghostmaster can provide protection for any camera from the high synch voltages and currents of older strobes, up to 400V.
The Ghostmaster was patented in 1996, but the patent is now in the public domain. However, after I began production of the product, I refined the circuit for increased reliability and component availability, and I never made these changes public until now.
The current demand for the device is not great enough to warrant quantity production, and there is some hand work involved. Perhaps some of our members might be interested in building the device for themselves. I have a number of the circuit boards on hand, which greatly simplifies construction and miniaturization. All other components are commonly available at electronics suppliers.
You can find complete details by searching US Patent 5,530,320 and I have attached the revised schematic.
Neal
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