What is the footprint (for planning purposes)

[BuckeyeDennis]

Sorry, but this is a bit off subject, but just barely.

When I lived in Oklahoma, in the Army, a friend and I got a couple of old pinball machines, and had to restore the electrics on them There was nothing electronic, it was all relays and transformers.

Cut to 5 years later, when I was working at McDonnell-Douglas, on the new MD-11. The cargo loading system was (again) run off of relays, and the Electrical Engineers had NO IDEA how to fix them, since most of their training was in semiconductors. I had to explain the process to them, after reading the schematics.

Sometime, EEs are smarter than they think they are. (But, most of the time...)

steve

That story took me Waaaay back to when I was a newbie grad student at Ohio State. A technician friend took me to some obscure lab and introduced me to the tech who ran the place. The subject of vacuum tubes came up. I confessed that while I had been told that they were easier than transistors, I really had no clue how to design vacuum-tube circuits. I thought that old tech would bust a gut laughing at me.

It took me a few decades, but I did finally come to appreciate the elegance of a classic ladder logic diagram. Now I use that format anytime it is appropriate, even when the circuitry is all electronic.

[JPG]

That story took me Waaaay back to when I was a newbie grad student at Ohio State. A technician friend took me to some obscure lab and introduced me to the tech who ran the place. The subject of vacuum tubes came up. I confessed that while I had been told that they were easier than transistors, I really had no clue how to design vacuum-tube circuits. I thought that old tech would bust a gut laughing at me.

It took me a few decades, but I did finally come to appreciate the elegance of a classic ladder logic diagram. Now I use that format anytime it is appropriate, even when the circuitry is all electronic.

And, boolean converts to ladder very easily.

Now about 'time'! . . . .

[skou]

That story took me Waaaay back to when I was a newbie grad student at Ohio State. A technician friend took me to some obscure lab and introduced me to the tech who ran the place. The subject of vacuum tubes came up. I confessed that while I had been told that they were easier than transistors, I really had no clue how to design vacuum-tube circuits. I thought that old tech would bust a gut laughing at me.

It took me a few decades, but I did finally come to appreciate the elegance of a classic ladder logic diagram. Now I use that format anytime it is appropriate, even when the circuitry is all electronic.

I know a guy, who designs and builds jet engines, as well as gas turbine engines. For his control units, it is basically a ladder design, even though he uses a LOT of electronics. (OK, for me, electronics involves some kind of semiconductor. Transistors, diodes, MOSFETs, LEDs, anything that functions without any physical action.) Vacuum tubes would be electronic, if we could still find some.

Try and figure out a starting circuit for a jet (or turbine) engine. This guy does it, and does some AMAZING stuff. If you want to see some of his stuff]http://www.rcdon.com/index.html[/url]

Go to the experimental projects section.

steve

[dusty]

Didn't mean to stir the pot and go away but lack of a power surge when it starts was my point exactly. The salesperson (anonymous) specifically said 2 amps and not when turning the computer on but at motor startup. He did follow up with a further comment about increasing speed and load required additional amps. I can not run my 510 or 520 and a DC3300 on a 15 amp circuit with consistent results but I can a Power Pro and DC3300. My point being that the original poster might not need to change his 15 amp circuit to run a Mark 7 Power Pro. Stand alone SPTs like coffee pot and toaster may want to be on another circuit if used at the same time. Can not remember the exact startup amperage of the Mark V but someone can remind me.


Think about the ads on Craigslist for a Shopsmith when the guy says he only used it once. Sometimes its the truth the machine had five other owners in its lifetime but he only used it once when he broke it. Like this forum there is a lot of fantastic advice here and some that even I have had to shake my head at.

I bought a Shopsmith for a hobby the car I had to have or walk.

I've been doing that for many years. Just turn on the Mark V first and then the DC3300.

[dusty]

I know a guy, who designs and builds jet engines, as well as gas turbine engines. For his control units, it is basically a ladder design, even though he uses a LOT of electronics. (OK, for me, electronics involves some kind of semiconductor. Transistors, diodes, MOSFETs, LEDs, anything that functions without any physical action.) Vacuum tubes would be electronic, if we could still find some.

Try and figure out a starting circuit for a jet (or turbine) engine. This guy does it, and does some AMAZING stuff. If you want to see some of his stuff]http://www.rcdon.com/index.html[/URL]

Go to the experimental projects section.

steve

Tell me what you need and I'll check the Tube Caddie. I know I have a good supply of 5U4s.

[JPG]

I know a guy, who designs and builds jet engines, as well as gas turbine engines. For his control units, it is basically a ladder design, even though he uses a LOT of electronics. (OK, for me, electronics involves some kind of semiconductor. Transistors, diodes, MOSFETs, LEDs, anything that functions without any physical action.) Vacuum tubes would be electronic, if we could still find some.

Try and figure out a starting circuit for a jet (or turbine) engine. This guy does it, and does some AMAZING stuff. If you want to see some of his stuff]http://www.rcdon.com/index.html[/URL]

Go to the experimental projects section.

steve

A ladder 'design' is essentially a method of drawing a schematic with boolean terms. A timing chart is definitely a good 'addition'.