Selfrunning cold electricity circuit from Dr.Stiffler

[DrStiffler]

If you have build the 'Thomas' oscillator and used an NPN as specified, try the following.

1)Run your existing circuit. Pay special attention to the heat given off by the transistor, the current drain and the maximum number of LEDS you can drive.

Lets say for example you are using a 2N3904 NPN hfe >=195

Switch to a PNP that is comparable, lets say a 2N2907, same ~hfe (if not a 2907) then one with bandwidth as good as the 3904.
Be sure to adjust the polarity of any filter capacitors you may be using, insure you have properly switched the power supply polarity.

2)Run the new configuration, which should be the same except for changing to a PNP. Watch and note the heat dissipation from the transistor, note the brightness of the LEDS and how many more you could add.

So with all the theory being expounded in this thread about RF theory and how common these circuits, please point me to why there may be a difference in NPN versus PNP for the oscillator???

[EMdevices]

*removed* EM

[DrZLowe7]

If you have build the 'Thomas' oscillator and used an NPN as specified, try the following.

1)Run your existing circuit. Pay special attention to the heat given off by the transistor, the current drain and the maximum number of LEDS you can drive.

Lets say for example you are using a 2N3904 NPN hfe >=195

Switch to a PNP that is comparable, lets say a 2N2907, same ~hfe (if not a 2907) then one with bandwidth as good as the 3904.
Be sure to adjust the polarity of any filter capacitors you may be using, insure you have properly switched the power supply polarity.

2)Run the new configuration, which should be the same except for changing to a PNP. Watch and note the heat dissipation from the transistor, note the brightness of the LEDS and how many more you could add.

So with all the theory being expounded in this thread about RF theory and how common these circuits, please point me to why there may be a difference in NPN versus PNP for the oscillator???

Thanks for asking.
A similar PNP transistor to the 2N3904 is the 2N3906. A 2N2907 is rated to handle 5 times more current than the 2N3904.

[DrStiffler]

If you have build the 'Thomas' oscillator and used an NPN as specified, try the following.

1)Run your existing circuit. Pay special attention to the heat given off by the transistor, the current drain and the maximum number of LEDS you can drive.

Lets say for example you are using a 2N3904 NPN hfe >=195

Switch to a PNP that is comparable, lets say a 2N2907, same ~hfe (if not a 2907) then one with bandwidth as good as the 3904.
Be sure to adjust the polarity of any filter capacitors you may be using, insure you have properly switched the power supply polarity.

2)Run the new configuration, which should be the same except for changing to a PNP. Watch and note the heat dissipation from the transistor, note the brightness of the LEDS and how many more you could add.

So with all the theory being expounded in this thread about RF theory and how common these circuits, please point me to why there may be a difference in NPN versus PNP for the oscillator???

Thanks for asking.
A similar PNP transistor to the 2N3904 is the 2N3906. A 2N2907 is rated to handle 5 times more current than the 2N3904.

Thanks for he less than informative response. So what? This is far from my point. But your response is irrelevant. If you have built the circuit and tried what I suggest then report your scientific finding, not a spec sheet response.

[DrStiffler]

RStiffler, 

I like the circuits discussed here, and it's realy nice to see light.    I appreciate all this QUALITATIVELY,  but we need QUANTITATIVE analysis to prove if it's OU.   If that's not the intent, then I guess we can continue to play with batteries and LEDs and make pretty light.

Now,  I am convinced the power comes from the battery, signal source, etc..  Untill I see quantitative results, I can't change my opinion.  Perhaps if I see a closed loop system without batteries then we won't need the quantitative results, maybe.

Have you observed anything unusual with the PNP instead of the NPN?

EM

Lets see you have built a circuit and need to known how to obtain QUANTITATIVE data? Its called measurement. Measure your circuit, is it a circuit I spec or one of the others that have measured OU? If not then what are you talking about.

See you do not accept data already presented, so what spoon feeding, how does someone like you become convinced. Like build and test, I'm not around to serve you, I owe you nothing. If you don't like what is going on, you know what is said, 'Don't look' then it will not bother you....