Recent content by 280Z28

30wpm right now with strictly-proper touch typing :) https://www.physicsforums.com/showthread.php?t=150292

I switched to the Dvorák keyboard layout on 12/28/06, 4:30pm. I want to see not only how quickly I can match my previous speed (65wpm on QWERTY), but how much I can exceed it by. I did not rearrange my keyboard keys, so I never look at them (since only the a and m keys type the letter that's...

I have a servo motor that I'm controlling with a simple PID controller for a constant frequency square wave with varying duty cycle. My supply voltage is 5.17V with ~1V drop across my low side driver. The controller sits right around 50% duty cycle to keep the servo open to position A. A...

I need a DC power supply for a project I'm working on. I have a Leach amplifier with a monster power supply and heat sinks able to handle it clipping at ~500W/channel. It's just sitting on my floor. I also have a 2 16bit 1MHz DACs and 2 16bit 200KHz ADCs attached to a National Instruments...

Maybe the links are different when you're logged in, but they go to 106 and 103 for me. :dunno: Thanks for that explanation, I found my error: What I finally had was: (4 choose 1)*(3 choose 1) + (4 choose 2)*(2 choose 2) + (4 choose 1)*(3 choose 2) + (4 choose 1)*(3 choose 3) I forgot to...

I assume it means you can pair a 1 element set with a 1, 2, or 3 element set, but you'd definitely not have to compare 1x1 element sets or nxm element sets where n doesn't equal m. But still, there are (2^4-1) non-empty subsets in that case. :dunno: I just can't find a pairing that counts to 25...

What are "Subset Pairs" as mentioned in this problem? In reference to this problem. BTW - I'm not asking for a solution or even a method of attack for a solution since I just enjoy doing these puzzles. I'm just trying to get clarification on one of the terms used...