Recent content by solvejskovlund

My loved ones were kidnapped two years ago. There's nothing I can do with a battery to harm them. Regarding my previous posts, I see them as there are 3 or 4 highly active users in here that focuses details that I don't see as relevant for the question asked, and they use that "missing", not...

You're right. We don't know. At least I don't know. I find it strange that the could be switched on/off many times during the test. If that load was weakening them so much, I find it strange that I would happen to stop the experiment at the very last power on/off they could handle. I feel...

Sure. That's why they have to be prepared for the mission - make sure voltage is within a 50mV difference before connecting them. The purpose of parallel connection before series is to make sure they are perfectly balanced. The old style, with a thin wire coil inside.

The shock of being turned on should be way heavier with the 800Vdc/3 (=266Vdc) that they survived several times than the first 241Vac shock that came only once. Any power on shock may kill a bulb. But all 3 of them at the same instant cannot be explained by ware. Most likely they had different...

You're right. 192 cells in series.

I wanted to figure out which of my used li-on cells that would match, so I connected them all in parallel to make them equal, then connected them in series for a discharge test. This meant I needed something to use for discharging.... accepting over 800V. What I came up with was borrowing 3x...

Sure an arduino would do the job. But if such a circuit is available for order, it may be better/easier. I would assume it exists. I just don't know the correct search term

I'm looking for a circuit to control a relay using preferably a single button, but two buttons is ok. I picture a behavior similar to this, starting with the relay control signal off / disconnected / floating: case 1: Press the button once: power on the relay, set a timer to X minutes and start...

Thank you for this great way to explain whats happening. If I understand this correctly, the resistance of both materials will increase with increased frequency, and this increase happens individually of each other, so the copper (solid) core resistance would be the same no matter if the shield...

As I said above: So the skin effect will not cause all the electrons to prefer the aluminum path to such extent that the higher resistance of the alu will cause total resistance to increase as the copper in center is left nearly unused?

I think all of those cables can be used to send a current in one end, and you'll get it out at the other end. Sure they have different "advanced" properties - like wire cross section area, internal interference, how much current they handle, how much voltage you can apply before you may...

That assumes the shield was connected to ground, which I though was clearly stated in the question - and the follow up - that the shield was not connected to anything other than the wire (cable core) in both ends.

It's quite similar to a coax, yes. Just that the shield in a coax tend to be woven copper, while the cable I was handling, and got me into this thinking, was a aluminum sheet wrapped around. Either I don't understand what you are explaining, or we are thinking two very different scenarios. What...

Well, if the shield was connected to something else, then surely that something would be affected as well. But I was thinking of what happens to just the cable, for the simplification used as a 1-wire only. This implies that there must be another path/cable for the return current.

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the...