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A Thief in the night---- His lights went out
@ Everyone ---Sometime last night when I was asleep, my first JT stopped. It was beyond the 8.5 day mark. This morning the source battery reading was .5 volts and the charge battery was 1.12 volts. The little guy's eyes were dark. I swapped the batteries and his eyes lit up again and I'll let it run some more to make up for the time that I was asleep. The depleted battery should regain some energy but this afternoon I will consider the experiment over and take final readings.
When this was started the calculation was that it might run as many as 200 hours and it did so this should be considered a success---but not a total one. If I had simply put the two batteries together in parallel at the start with no charge battery, this might have run just as long. Amigo's experiment would tend to support this. If I let this run to the bitter end when neither battery will run the system, this might show a few hours gain in run time. Either way this was one of my most interesting endeavours.
Imagine this: You go on a weekend camping trip and take along one of these. You turn it on in the tent when you get there and never turn it off. Or say you build half a dozen of these and spread them around the house. That bad day comes when the power goes out and doesn't come back on. You go around the house, turn these on and forget about emergency light for a week while you deal with other problems.
Mart Hale told me that he might make one one these with one "D" cell. That would do the trick. Add a second one and it gets even better.
@Luc----I will try working with the coil windings and the capacitors to see if this can be made more efficiect and resonated better. Another idea has come up about frequency. If the LED blinked, our eyes would not be able to detect it if it was just above 60Hz. The thinking is that the energy needed to blink the light at that low frequency would be less. How to get the circuit to resonate at that low a rate is the question.
Cheers,
Lidmotor
@ Everyone ---Sometime last night when I was asleep, my first JT stopped. It was beyond the 8.5 day mark. This morning the source battery reading was .5 volts and the charge battery was 1.12 volts. The little guy's eyes were dark. I swapped the batteries and his eyes lit up again and I'll let it run some more to make up for the time that I was asleep. The depleted battery should regain some energy but this afternoon I will consider the experiment over and take final readings.
When this was started the calculation was that it might run as many as 200 hours and it did so this should be considered a success---but not a total one. If I had simply put the two batteries together in parallel at the start with no charge battery, this might have run just as long. Amigo's experiment would tend to support this. If I let this run to the bitter end when neither battery will run the system, this might show a few hours gain in run time. Either way this was one of my most interesting endeavours.
Imagine this: You go on a weekend camping trip and take along one of these. You turn it on in the tent when you get there and never turn it off. Or say you build half a dozen of these and spread them around the house. That bad day comes when the power goes out and doesn't come back on. You go around the house, turn these on and forget about emergency light for a week while you deal with other problems.
Mart Hale told me that he might make one one these with one "D" cell. That would do the trick. Add a second one and it gets even better.
@Luc----I will try working with the coil windings and the capacitors to see if this can be made more efficiect and resonated better. Another idea has come up about frequency. If the LED blinked, our eyes would not be able to detect it if it was just above 60Hz. The thinking is that the energy needed to blink the light at that low frequency would be less. How to get the circuit to resonate at that low a rate is the question.
Cheers,
Lidmotor
that it could work if disruptive discharge from capacitor was manually switched into the Bifiliar coil - windmill could do this - then the voltage produced would be high enough. I've outlined a theory why voltage increases in a coil btw, on Aromaz thread.
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