On Wednesday 11 December 2019 21:43:44 jrmitchellj . wrote: > An X10 appliance module would be a better option for that. Lamp > modules are essentially dimmers. > > --J. Ray Mitchell Jr. > [email protected] > Does that make a huge diff to a switch mode psu?
Using an appliance module means the lubricant in that alternate action relay is 40+ years old. I have a couple of those, controling Christmas lights on the front deck, and they have reached the age at which even 3 bangs from heyu a second apart will not reliably switch them. Attempts to re-lubricate them have not been successful here. I would think the speed of the lamp modules response would not be a huge problem as long as the off period was both complete, and long enough to discharge the output caps of that psu, at least 10 seconds. All the hullabaloo is to keep you from using it to control a transformer primary which can be subjected to saturated iron by an unbalanced dc waveform which the LM465 will definitely do as its switching by ramping up and down. But its a transformer these supplies _don't_ have, its a direct line voltage ac to dc conversion feeding an ultrasonic inverter. I think the 300 watt lamp rating would not be exceeded at turn on if a 1 second fadeup to full power was sent, the input capacitor charge rate would be a control to prevent even a single cycle of overload as its recharging the psu's input capacitor. That 300 watt rating of the LM465 is in deference to the inrush of larger cold lamps, which can easily exceed several kilowatts on the first cycle if just banged on. Ramping it on over a second or so seems absolutely safe to this old C.E.T. I also do not know if feeding a std BoB with 5 volts from the 5i25 can be done via the 5i25 jumper settings as ISTR ringing one out years ago and finding that all 8 wires in the db25 were indeed ground, so enabling the 5i25 jumper can only be done if the BoB on p2 is a suitably wired mesa card. These are not, they are both std BoBs. Instantaneously I suspect only Peter can comment to that concern today. Now if that 5 volts jumper on the 5i25 only switches P3 and the 7i76D we're home free by enabling it, but if it also switches P2, we just smoked the pci buss and the 5i25 because a stock BoB uses all 8 ground lines and would be a very low R short on the 5 volts being fed out by the 5i25. The computer I was using for email while ordering stuff for this one, was in the midden heap because it wasn't supplying 5 volts to the slot the 5i25 was in. And its possible that was caused by the jumper being enabled with a std BoB on p2. It happened while rebuilding that interface originally. So I think this needs clarified by Peter. Does that jumper switch P2's 5 volts on the 5i25? If it does, I can't use a std BoB on p2 without breaking the "now" 5 volt pins off in the db25. Peter? Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
