In keeping with the off topic theme and since you mentioned CD ignition... http://www.autoartisans.com/images/igf200.jpg This one is CD ignition (with that 350V step up) for one coil per cylinder and multi-point sequential fuel injection for Honda VTEC 1500CC engines used in homebuilt aircraft and hovercraft.
But I had fun last night after reconditioning all the filter caps since they hadn't been powered since about 1991. http://www.autoartisans.com/S100/Hydra-80186-Inside.jpg and then put the power supply back together, verified power was good before I plugged in the motherboard and SASI/Floppy disk controller. http://www.autoartisans.com/S100/Hydra-80186-DriveB.jpg Might just have to write a utility that reads and rewrites each sector on the hard drive. Don't think something like LCNC would run on something like this. John > -----Original Message----- > From: dave engvall [mailto:dengv...@charter.net] > Sent: April-10-22 9:23 AM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Controlling DC motors. > > Clearly OT! > Indeed electronics have�� come a long ways since then. > I still have my Dad's 200 w-sec strobe. Oil filled caps from Edmund > Salvage dumped to the flash tube with a thrytron. Later vintage an > electronic ignition, nice toroid 6 v to 400 v converter and a decent SCR > for my�� PV544 (pregnant roller skate). Got me a gain of about 1.5 > mi/gal averaged over a year. .... and a constant current supply ... that > drove a 1:2 step up transformer to light 5 to 32 orchard heaters ( eg. 1 > row ) a single person could light up a whole orchard in a few minutes, > either propane or fuel oil. I think that project only lasted a few > years. pulsed 220 drifting avout an orchard was just too dangerous. > Finally came the switch to sprinklers and orchard fans. .... > and then grey smog� in the morning went away. No the old days were not > necessarily the good old days. > > Dave > > On 4/10/22 8:31 AM, Mark Johnsen wrote: > > That brings back memories. The fun of being at Grandma and Grandpa's was > > the Popular Mechanics and Popular Science magazines I could page thru when > > visiting. > > > > I remember all the pages in the back of the magazine where people were > > trying to sell things, I always wanted a VW Bug replica car conversion to a > > porsche or some old cool MB. Those pages are like today's internet > > advertisements, only the pages didn't do much tracking of your 'reading' > > history. > > > > Mark > > > > On Sun, Apr 10, 2022 at 4:55 AM Mark <wendt.m...@gmail.com> wrote: > > > >> Beat me to it. I was just about to say the exact same thing. > >> > >> What comes around goes around. > >> > >> Mark > >> > >> On 4/10/22 05:28, Gregg Eshelman via Emc-users wrote: > >>> In other words the person who designed that created a pulse width > >> modulation motor controller without calling it that. > >>> > >>> On Saturday, April 9, 2022, 08:18:17 PM MDT, John Dammeyer < > >> jo...@autoartisans.com> wrote: > >>> > >>> Really nothing to do with LCNC or even automation. > >>> > >>> I've been cleaning out old shelves and I have piles of Popular > >> Electronics Magazines. This one from December 1965 (yes, almost 57 years > >> old) has an article on how to improve model trains so they start slowly or > >> crawl rather than lurching forward requiring backing off the speed control. > >>> They call it pulse power. Using only transistors and diodes the article > >> describes a method of creating narrow pulses superimposed on a varying DC > >> voltage. One knob controls the width of the 12V pulses and the other the > >> amplitude of the DC mixed with the pulses. The pulses are 60Hz. > >>> Now we just buy stuff like that for way less than what the transistors > >> would cost. Things have come a long way. > >>> Just thought I'd share. > >>> John > >> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
