but I sit here for hours every day for years with 25kv or so, not to mention all the radiation of other types, spewing from the monitor a foot or two away from the jewels...:)
jim
as far as I know, the pinballs all used electro-mechanical displays until they switched to computers with LED or vacuum flourescent displays about 1977.
I have a Gottlieb Royal Flush, ca 1976, one of the last em machines...and a classically good playing one too. The numbers are just silkscreened on round wheels, with a cheezy solenoid driven stepping mechanism to advance it. I suppose it would make a neat clock, though...not as simple as the mechanical "digital" clocks made in the 40s-60s.
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http://www.mindspring.com/~jforbes2/tubeclock/cloc k.html
jim
but I sit here for hours every day for years with 25kv or so, not to mention all the radiation of other types, spewing from the monitor a foot or two away from the jewels... :)
jim
as far as I know, the pinballs all used electro-mechanical displays until they switched to computers with LED or vacuum flourescent displays about 1977. I have a Gottlieb Royal Flush, ca 1976, one of the last em machines...and a classically good playing one too. The numbers are just silkscreened on round wheels, with a cheezy solenoid driven stepping mechanism to advance it. I suppose it would make a neat clock, though...not as simple as the mechanical "digital" clocks made in the 40s-60s.