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Hello.
It is not uncommon for LED light bulbs to emit a faint glow when turned off, be it the nature of their internal driver circuitry, capacitive induction of the dwelling wiring, secondary effect of dimmers/switches, opening neutral, whatever. Found the effect a few times at home and solved...
Hello all.
A plain mobile phone can be charged with the 'usb' adapter plugged in to the 12VDC cigarette outlet in an automobile. But noticed that in my case, takes longer time than using the other adapter/charger from the 120VAC at home.
What schematic diagrams tell the difference ? Found...
Understood. Galvanized water pipes in my house are 64 years old. There is calcium build-up inside, irrelevant for electrical conduction.
Copper conducting 5 times better than iron, yes. Is that relevant for very high voltages for less than a millisecond ? Aluminium being also a better...
Thanks. That considerable power is typically ~100 microseconds to less than a millisecond in a lightning strike.
Why conductors from lightning rods-to-ground are not plain iron reinforcing bars as used within concrete, but copper ? Is it the extra profit of selling it in copper by installers...
Greetings.
Very high tension transmission lines do not need to be made of copper as the cost would be prohibitive and also, at very high voltages, the current can be reduced to convey a given power. For the reduced current and increased voltage, conductors can be a more resistive aluminium...
Hello all.
Which one do you believe is the reality ?
- Lightning rods do attract lightning and if there is a strike, current is conducted to ground.
- Lightning rods do repel lightning protecting a building from being striken.
- It is unpredictable. Can work both ways as above.
- Nobody knows...
A wrong answer worth trying if pleases you : Use 120VAC wiring two lamps in series and evaluate if performs reasonably well.
120V----------------------lamp1----------------lamp2----------------neutral.
120V----------------------lamp3----------------lamp4----------------neutral...
Thanks.
" ... 3.- can that diode in place of the bridge rectifier be a LED as the ones on the right side of the circuit ?
No. LEDs cannot withstand more than 5V Peak Inverse Voltage before the leak towards avalanche failure. "
What is the peak inverse voltage on the LEDs at right of the CCR on...
Thanks. Shifting a bit the subject; on post #1:
1.- can the bridge rectifier be replaced by one single diode ?
If yes,
2.- Will the circuit work more 'relaxed' on lower voltages from a single diode ?
3.- can that diode in place of the bridge rectifier be a LED as the ones on the right side...
Hi all.
Do you know of another brand of current regulator to drive LEDs directly from 240VAC ? I cannot find the one I saved its datasheet now. This is similar from ON semiconductor :
:
Hi . If I understood something, a scuba tank (~3000+ psi) with a regulator can provide a very long breath for nearly anything; the energy contained can be harnessed with ease for time or flow or pressure needed and the sum of them too.
Some expressions in Morse code allow only the ones who know the subject to respond; 'weeding out' who do not or unsure. I do not know if CT is center tap, or charging transformer, or computerized tomography. Why some posters assume everyone receives their telepathy ? Is it that hard to type ?
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