Is joule thief circuit gets overunity?

[Void]

*** I shall do the tests on Board 118 and 119 at home first and then take them to Zhou's Shop and repeat.  If the "noise" is indeed much higher, we may have a possible explanation of the "extra energy".

Hi Lawrence. You do not need to send any boards to me for testing if what you have been interpreting as unusual results is really just due to electrical noise pickup. However I can still test some boards for you if you like, if you want to have a comparison of my measurements compared to your measurements.

[Void]

See TK's Video.  His JT (based on my circuit diagram) lighted brightly with no power supply.  He attributed this to the board picking up "electrosmog" energy.  This explanation makes sense.....

Yes, this is what I have been saying. Electrical noise in a circuit can have many causes, including EM radiation. The electrical noise doesn't always come directly through wiring, but more often is induced from EM fields produced by various types of electronics equipment. Switching power supplies and computers, etc.,  produce a lot of electrical noise, and this noise gets induced in circuits and scope probes via the EM fields surrounding this type of equipment, but this electrical noise can also get picked up through electrical wiring such as an AC power cord or power supply wires, for example.

In TK's example, he is holding the board in close proximity to a very strong EM field, but even a weak EM field could potentially induce enough voltage in your circuit to cause the sensitive transistor to activate a little bit. You do not even need a transistor to get this sort of effect. I have done tests where I found I can hold one lead of a LED in my finger tips and touch the other lead of the LED to a terminal on my DC power supply with the DC power supply switched off, and the LED lights dimly. This is due to some voltage from the AC line and transformer in the DC power supply coupling into the power supply wiring, even though the power supply is switched off. The power supply still has to be plugged into the AC outlet for this to work this way however. Also, the LED I was testing with is a very sensitive type of LED, and it starts to light at currents as low as 15uA to 18uA or so.

Also, see my note in a previous reply (Reply #882 ) which I made a few posts ago about making sure to set both the scope probe switch multiplication factor setting and the scope channel probe multiplication factor setting to match. It seems that you didn't have this set to match in your input current waveform measurements?

[ltseung888]

Yes, this is what I have been saying. Electrical noise in a circuit can have many causes, including EM radiation. The electrical noise doesn't always come directly through wiring, but more often is induced from EM fields produced by various types of electronics equipment. Switching power supplies and computers, etc.,  produce a lot of electrical noise, and this noise gets induced in circuits and scope probes via the EM fields surrounding this type of equipment, but this electrical noise can also get picked up through electrical wiring such as an AC power cord or power supply wires, for example.
*** Agreed.  But can we effectively use such energy?  Board 124 with the capacitor and twin timer suggests that such may be possible.  I think if you use your supercapacitor and a twin timer, you may be able to make a rechargeable AA Battery last much longer.  The addition of a small capacitor in parallel with the 1K Ohm resistor may help also.

In TK's example, he is holding the board in close proximity to a very strong EM field, but even a weak EM field could potentially induce enough voltage in your circuit to cause the sensitive transistor to activate a little bit. You do not even need a transistor to get this sort of effect. I have done tests where I found I can hold one lead of a LED in my finger tips and touch the other lead of the LED to a terminal on my DC power supply with the DC power supply switched off, and the LED lights dimly. This is due to some voltage from the AC line and transformer in the DC power supply coupling into the power supply wiring, even though the power supply is switched off. The power supply still has to be plugged into the AC outlet for this to work this way however. Also, the LED I was testing with is a very sensitive type of LED, and it starts to light at currents as low as 15uA to 18uA or so.

*** I have seen such "ghost lighting effects" also.

Also, see my note in a previous reply (Reply #882 ) which I made a few posts ago about making sure to set both the scope probe switch multiplication factor setting and the scope channel probe multiplication factor setting to match. It seems that you didn't have this set to match in your input current waveform measurements?
*** I usually set the scope and probes to x10.  I damaged one Atten over three years ago by setting all values to x1.  My student teams were on the learning curve.  All my posted results used x10 except during calibration.

The question is - can we design efficient circuits to use the electrical noise or electrosmog???  From the description of the neighbors of the Hong Kong Person who "rumored" to have mastered such technique, the house was full of wires, electrical equipment and antennas.....  The Zhou Board is unlikely to be the final and best design to capture and use such energy.  More research needed (at Universities with the appropriate equipment and experts?)

The TK video pointed to many new possibilities.....

[Void]

Agreed.  But can we effectively use such energy?  Board 124 with the capacitor and twin timer suggests that such may be possible.  I think if you use your supercapacitor and a twin timer, you may be able to make a rechargeable AA Battery last much longer.  The addition of a small capacitor in parallel with the 1K Ohm resistor may help also.

The question is - can we design efficient circuits to use the electrical noise or electrosmog???  From the description of the neighbors of the Hong Kong Person who "rumored" to have mastered such technique, the house was full of wires, electrical equipment and antennas.....  The Zhou Board is unlikely to be the final and best design to capture and use such energy.  More research needed (at Universities with the appropriate equipment and experts?)

The TK video pointed to many new possibilities.....

Yes, your experiments with the timer charging a capacitor seem worth investigating further. Does the timer circuit you are using have a relay output with isolated contacts?

You probably can use electro-smog as a source of energy, but the problem is that most of this EM radiation around us is fairly low power, and you can probably only use it to at best light a LED or make a very low power battery charger. Maybe if a person set up a big array of high gain antennas they might be able to pull in a bit more power.
If someone is able to pull in more power than just a little bit this way, then they may be drawing power inductively off the main power grid lines, which is probably illegal.

[forest]

I saw somewhere an article in russian with a circuit tapping radio waves from radio station and using it to power small load like 5-10W bulb (depending on the distance to the transmitter).
The point is that the only needed thing is to charge large electrolytic capacitor, then everything should work in close-loop system....can you design such circuit charging capacitor from radio waves ?