Just a thought: Does the couple of turns through the magnets, if large current is pulled, make the magnets jump around - under perhaps rare placement conditions? Great video, thanks.
I don't think so. The wire is not insulated and does not form a coil. Current will go everywhere including through the magnet. Anyway currents can not get that high.
(Google translate helped...) You need a resistor between the capacitor and the LED to reduce the maximum current. Without the resistor the LED will blow up. Let's say your capacitor gets charged to 12V and your LED is a white one with 3V and 100mA max. Then the resistor must be about 90 Ohm and it must be at least a 1Watt type or higher. If you take a low power resistor it will burn. R = U(total) - U(LED) / I U=voltage, I=current Better that a resistor would be a constant current regulator that could be made with a simple FET transistor. This would allow a constant brightness when the capacitor voltage drops.
Have one sitting somewhere, a junk I bought in one of the many fairs I attended in the past... Probably now it is submerged by the other junk I bought later...
yes but not at full brightness. Anyway, the capacitor will be overcharged every time you shake that thing... You can choose to blow the cap or the LED :-)
To reach the 20V with the supercap (=0.47F vs your cap=0.0047F), you will need to shake it 100 times the amount you've done, ca.40 X 100 = 4000 times… Edit: It has a biological (getting tired) over-charge protection.
No, it doesn't take anywhere near that to easily destroy it. It's only a 2.5V cap and the LED can't handle much more. People often shake the flashlight before each use, regardless of whether it was fully discharged. Supercaps keep their charge for a long time, so it would gain charge over time till it self-destructed (as this one did).
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Can you make 4 and spin it on a wheel ?
That you connect with a Motor 🤔
You just invented the generator....
I can confirm that the original capacitor is indeed a supercap, probably 0.47 to 1F, 2,5V
Just a thought: Does the couple of turns through the magnets, if large current is pulled, make the magnets jump around - under perhaps rare placement conditions? Great video, thanks.
I don't think so. The wire is not insulated and does not form a coil. Current will go everywhere including through the magnet. Anyway currents can not get that high.
back in the 70's , we used to say "Shake it, but don't Break it"
Shake it don’t break it
Took ya mama nine months to make it 😉
Nice trick with the ring magnets. Interesting video overall.
Felicitaciones por el trabajo, me puedes decir de cuanto es el valor de la resistencia a colocar y en que parte del circuito, saludos desde Argentina
(Google translate helped...)
You need a resistor between the capacitor and the LED to reduce the maximum current. Without the resistor the LED will blow up.
Let's say your capacitor gets charged to 12V and your LED is a white one with 3V and 100mA max. Then the resistor must be about 90 Ohm and it must be at least a 1Watt type or higher. If you take a low power resistor it will burn.
R = U(total) - U(LED) / I U=voltage, I=current
Better that a resistor would be a constant current regulator that could be made with a simple FET transistor. This would allow a constant brightness when the capacitor voltage drops.
Fantastic I love shaking my junk, my wife not so much these days
There is some nice design that went into that flashlight. Always a bit baffled about the shortcuts taken. . .
Have one sitting somewhere, a junk I bought in one of the many fairs I attended in the past... Probably now it is submerged by the other junk I bought later...
The Modern white LEDs the common Voltage is 2.9V so even 2.5V are enough to light it up.
yes but not at full brightness. Anyway, the capacitor will be overcharged every time you shake that thing... You can choose to blow the cap or the LED :-)
Put a 3.1V zener diode in parallel with the cap to stop overcharging.
I shook my junk too fast and it only took 4 seconds untill it began to self oscilate...
Interesting skills... :-)
The og shake weight how about an old fashioned
To reach the 20V with the supercap (=0.47F vs your cap=0.0047F), you will need to shake it 100 times the amount you've done, ca.40 X 100 = 4000 times…
Edit: It has a biological (getting tired) over-charge protection.
Put it on top of the washing machine when its on spin cycle to shake it for you. 4000 is easily achievable.
No, it doesn't take anywhere near that to easily destroy it. It's only a 2.5V cap and the LED can't handle much more. People often shake the flashlight before each use, regardless of whether it was fully discharged. Supercaps keep their charge for a long time, so it would gain charge over time till it self-destructed (as this one did).
my intro :(