Is joule thief circuit gets overunity?

ltseung888 · May 10, 2013, 03:05:51 PM

Day 4 of the experiment. There is excitement with the results.

Note that the voltage on Board 116 has dropped to 0.352V but the LED was still ON. The voltage on Board 124 was 1.175V and the LED was still brightly ON. The contrast of the brightness was unmistakeable even to an old man with poor eyesight.

Why should the addition of the Capacitor and the Twin Timer made so much difference? The timer was bought at a local electric components store and no schematics or circuit diagram of the timer was provided.

While I waited for the possible purchase of the Tektronics, I used the Atten to find out what was going on. There was still the crossing of the 0 reference line. But there were sharp voltage spikes in both directions well exceeding 20mV. That would imply positive and negative Input Power or pulse charging and draining of the battery.

@Poynt99
Can you check this out with your Tektronics now? Otherwise, we have to wait a few weeks. Thanks. For this part of the experiment, you do not need the Timer. You just need to get a rechargeable AA battery and hook it up to Board 33 with NO capacitor. Wait for 3-4 days until the battery voltage drops to below 400mV. Then take scope pictures. All other testers can do the same.

This "spike crossing 0 reference line" may explain the long life of some JTs - over 1 year? Amen.

ltseung888 · May 10, 2013, 06:09:36 PM

Quote from: ltseung888 on May 10, 2013, 03:05:51 PM
Day 4 of the experiment. There is excitement with the results.

Note that the voltage on Board 116 has dropped to 0.352V but the LED was still ON. The voltage on Board 124 was 1.175V and the LED was still brightly ON. The contrast of the brightness was unmistakeable even to an old man with poor eyesight.

Why should the addition of the Capacitor and the Twin Timer made so much difference? The timer was bought at a local electric components store and no schematics or circuit diagram of the timer was provided.

While I waited for the possible purchase of the Tektronics, I used the Atten to find out what was going on. There was still the crossing of the 0 reference line. But there were sharp voltage spikes in both directions well exceeding 20mV. That would imply positive and negative Input Power or pulse charging and draining of the battery.

@Poynt99
Can you check this out with your Tektronics now? Otherwise, we have to wait a few weeks. Thanks. For this part of the experiment, you do not need the Timer. You just need to get a rechargeable AA battery and hook it up to Board 33 with NO capacitor. Wait for 3-4 days until the battery voltage drops to below 400mV. Then take scope pictures. All other testers can do the same.

This "spike crossing 0 reference line" may explain the long life of some JTs - over 1 year? Amen.

One would expect the LED will soon be OFF with a 0.352V AA battery supplying energy. It is at least 3 hours since my last post. The LED is still ON on Board 116.

The most surprising thing was that LED on Board 124 with the capacitor and the timer is still ON brightly. The Brightness is always on the high side.

This experiment is easy to perform and repeat. Highly accurate instruments are not needed.

Are the Zhou Boards OU in this environment???

ltseung888 · May 10, 2013, 06:46:42 PM

The Input waveform expanded. The time scale was changed to show more detail on the spikes.

It was clear that the spikes go above and below the main horizontal trace. The values are approximately the same. If we take the main horizontal trace as the "presumed 0 ref line", we have positive current and negative current.

Now it is a matter of waveform and NOT accuracy. Will the Tektronics or other reliable DSOs produce the same or similar waveform?

Can the up and down spikes explain the long lighting of a 0.352V rechargeable battery?

ltseung888 · May 10, 2013, 08:23:45 PM

Another result 2 hours later. I hope to have more results before the LED on Board 116 goes OFF completely.

So far, it appears that the LED will still be ON for several hours more. The up and down spikes may actually mean charging and draining of the rechargeable battery. Additional energy (Lead-out energy?)must come in to do that.

The encouraging part is that Board 124 LED is still brightly ON. We do not have to work with dim LEDs.

This particular experiment will be repeated with multiple Boards and Parties in Hong Kong and Shenzhen first - with 4-CH Tektronics when available. It may open the door to the mystery of lighting many LEDs for months or years with just a rechargeable AA battery. I am sure that Lead-out energy is responsible.

ltseung888 · May 10, 2013, 11:13:26 PM

May 11, 11:05 am. LED on Board 116 still ON.

Shall go out for 3 hours. Not bad for a battery reading less than 360mV.

LED on Board 124 is still brightly ON. I shall meet a couple of researchers for lunch. I shall ask them to do the same experiment on their boards. Just purchase rechargeable AA batteries. They already have DMMs. This experiment is definitely worth repeating and spreading to multiple groups.