On Thursday, May 30, 2019 at 5:59:48 PM UTC-4, gregebert wrote: > > My big clock simulates clock-hands with 306 NE-2H bulbs; during self-test, > all of them light-up and you can actually *feel* the light on your face. > It's a weird sensation because the bulbs dont actually heat-up and > re-radiate in that short of time. >
When I ran the computer center at St. Potato's (see https://www.glaver.org/blog/?p=926 for some background) we had acquired a donated Gandalf Quad PACX IV which was a 1024-terminal to 512-host-port concentrator. Each port had 4 red LEDs, so a total of 6144 LEDs. It also had a "lamp test" button. I bet you can see where this is going... Those LEDs gave off enough IR that you could feel it from quite some distance away - we'd have people stand there with their eyes closed and hit the lamp test button. I wonder how much of the power supply capacity was in there just to handle the lamp test function. Of course, IBM 370 systems had incandescent lamps and the CPU "lamp test" button would light up everything on the CPU and most peripherals - but that CPU had a 3-phase 60A power connector. I eventually got a trade-in credit from DEC to replace the PACX with a bunch of DECserver 550 units. Between that credit, the educational discount, and some special discounts I applied creatively, they actually paid us to take the DS550s. And then we made them haul away the PACX, because it was a trade-in after all. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1f40de57-1bc3-491e-8034-067a23378832%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
