On 03/19/2010 12:58 AM, Harry Veeder wrote: > > > test 8 http://www.youtube.com/watch?v=sbgwlJx0zNw With only a signal > generator attached.
This is a variation on Stiffler's circuit, which, as you may recall, worked with just one wire from a signal generator connected. Capacitive coupling is very likely playing a role here. And, once again, the *only* way to be sure of what's going on is to measure the *POWER* coming out of the signal generator. And that can *ONLY* be done is to make simultaneous voltage and current measurements, at the signal generator terminals, and integrate their product. Note well: With this load, the voltage and current from the signal generator may very well not be -- are probably not -- exactly in phase with each other. During the part of the cycle where the voltage and current are going "in different directions", power is flowing backwards into the SG. During the part of the cycle when voltage and current are going "the same way", power is flowing forward out of the SG. So, as I said, the only way to find the total power out of the SG is to integrate the product of the voltage and current (which a digital scope such as the one used in these experiments may be able to do). The reason it's possible to have this behavior, where power flows from the SG to the circuit part of the time and from the circuit to the SG part of the time, is that both capacitors and coils store energy, and when they give it up, it can flow back into the source. Resistors don't store energy, they just throw it away, so when you're driving a resistor the current and voltage are always precisely in phase. > ALL meters removed in the second half of this > video. At the end he asks others to build the circuit and post their > results. > > test 9 http://www.youtube.com/watch?v=bgPR9r14zWE With a pick up > coil. Green LED is used to provide a relative comparison between > current from the mosfet vs current from output coil. > > Harry > > > __________________________________________________________________ > Looking for the perfect gift? Give the gift of Flickr! > > http://www.flickr.com/gift/ >
