Recent content by Averagesupernova

A pull down resistor has one lead grounded. The table top example I gave is using a pull down resistor. - The benefit of the pull up or pull down resistor is that if there is nothing else attached to IC lead besides the resistor it is tied to a logical something. Either high or low and not...

Agreed. Is there another way to maintain order of contact without excessive complexity? I can see a peg in the end of the plug that would activate all of the contacts at the last moment. Reliability, size and complexity becomes an issue. A triangular plug with redundant contacts all around would...

While we are dreaming of a new type of connector that plugs into the wall for power I would make it triangular and keyed so it's impossible to plug in 120 degrees off. A contact on each side arranged so a specific order is achieved upon plugging in as to what makes contact first. Flipper door(s)...

The NEC is very concerned about keeping 'everyone else's business' out of the equipment that the rules of the NEC govern. In other words, nothing can share a conduit or technically even be zip tied to a conduit. This begins at the meter and ends at the receptacle. NEC has no say in what you plug...

Great! That's what this forum is for. Refreshing change from those who come here to argue that they can, or already have, broken the laws of physics. Or to claim they are above safety. -

Current code in the USA requires pretty much every receptacle to be tamper proof as @tech99 described. - If you are serious about having input to develop a standard you need to be more informed. If this is just for fun, then I guess we'll just keep going as we are here. - I know it has been...

In the USA low voltage wiring such as data, speaker wires, etc are not allowed to run in the same conduit and eventually receptacle box as the 120 volt power wiring.

The circuits are the same. You get the one with the metal tabletop correct but for some reason cannot understand the other.

@Patch Cabbage do you realize that a correctly configured pass transistor(s) act to reduce ripple? Apparently not and apparently the experiments you have done have not proven this out. It is impossible to get anywhere farther than you have without understanding schematics. Arm waving and talking...

None of that makes any sense to me.

I never realized it was so difficult to understand. Yes, you could say that there is no voltage source powering anything. Suppose you have a work bench with a metal top. Solder one lead of a resistor to the bench top. Then set a double A battery (cell technically) next to it with the negative...

If you cleaned that schematic up to make it more readable...... - .....it still won't work.

Hint: You always have an infinite number of infinite resistances in parallel with the open switch. You have that even with no switch. If a switch is open, it is the same as it not being there. How could that be anything but a logic zero with a pull-down?

We did this as kids outdoors with a blindfold and being lead around. We knew the area well but it was very easy to get lost. Get lead around for twenty minutes while the person who was guiding tried their hardest to disorient the one blindfolded. No one ever got hurt or walked of a cliff.

The part you do have correct is that GND = GND = GND. - What is Req1 and Req2? Equivalent? Why would you have an Req1? R1 is always in series with the rest of the circuit. Why do have an infinite equivalent resistance of the open switch in parallel series with a finite resistance? That is wrong. -