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Author Topic: The anomalous kicks  (Read 13808 times)

Rosphere

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Re: The anomalous kicks
« Reply #15 on: February 19, 2007, 06:56:36 PM »
EMdevices,

I reconfigured my coil to the 3/1 ratio as described.  The LED, (with no resistor,) does not glow in this configuration with the MOSFET I used.  (Yes, Stefan, the LED still works.)

I am not getting your results.  Please tell us your exact MOSFET component when you are able to see it again.

Rosphere--Waiting patiently.  :)

The LED glow in the photo is a camera flash reflection.
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EMdevices

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Re: The anomalous kicks
« Reply #16 on: February 19, 2007, 10:23:10 PM »
Rosphere,

I'm not using a MOSFET, I think its a BJT for high voltage horizontal and vertical Television coil controls.  I bought it a while ago.   It's a PNP type.  I don't have the specs on it cause I lost the cover, but I have a simular cover for a NPN I bought at the same time,  I remember they were veryclose in specs.

I'll post more later tonight.

EM
« Last Edit: February 20, 2007, 01:30:48 AM by EMdevices »
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hartiberlin

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Re: The anomalous kicks
« Reply #17 on: February 19, 2007, 11:49:25 PM »
Hi EM,
what do you mean by BJT ?

What abbreviation is this ?

Many thanks.

P.S: Why is your LED has any effect on the circuit ?
I heard some new blue-green LEDs have some kind of negative differential resistor
regimes...hmm, but this is a standard red LED ?!
Can you put a 100 nF power supply buffering cap across the battery
and the circuit still oscillates ?
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hartiberlin

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Re: The anomalous kicks
« Reply #18 on: February 19, 2007, 11:54:31 PM »
@Rosphere
if you use a MOSFET with almost no input current,
you probably have to set the DC gate working point with a voltage
divider potentiometer at the right DC operation voltage level,
so put a 10 KOhm pot between + 9 Volts and ground and
put the center pot pin additionally onto the gate.
Then adjust for the right gate-ground DC voltage until you get
oscillations.

You might also try to put the gate coil between
output of the center pot pin and the gate, so the
DC gate voltage is oscilllated-(modulated) from the coil
voltage.
Then the 2 coils just have to have the right 180 degrees phase shift to
start the oscillations.

Regards, Stefan.
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gyulasun

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Re: The anomalous kicks
« Reply #19 on: February 20, 2007, 12:24:44 AM »
Quote from: hartiberlin on February 19, 2007, 11:49:25 PM
Hi EM,
what do you mean by BJT ?

What abbreviation is this ?

Many thanks.


Hi Stefan,

BJT usually is short for Bipolar Junction Transistor, so it refers to a normal transistor like 2N2219 or the age old AD161 etc.

Regards
Gyula
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Rosphere

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Re: The anomalous kicks
« Reply #20 on: February 26, 2007, 01:34:43 PM »
.
« Last Edit: April 02, 2007, 03:07:49 AM by Rosphere »
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xilusma

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Re: The anomalous kicks
« Reply #21 on: February 27, 2007, 03:14:14 AM »
Hi All,

Just for info, I think the circuit that EM used is more likely to be a fly-back configuration, only using air core.

You could get more Volt from it, if you have more turn on the collector coils. The only lacking is the current  ??? .

My suggestion is, try to used the bedini-cole configuration and used with the fly-back (if possible) to get it to self powered (self induced).

Regards,
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bitRAKE

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Re: The anomalous kicks
« Reply #22 on: February 27, 2007, 06:02:20 AM »
Similar circuits are used to charge a battery from a solar cell:
http://www.talkingelectronics.com/Projects/SolarCharger/SolarCharger.html
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pese

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Re: The anomalous kicks
« Reply #23 on: February 27, 2007, 07:57:40 AM »
http://pixerve.de/47752/pese.html

shown this from my collection

http://ch.to/FE

Pese
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EMdevices

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Re: The anomalous kicks
« Reply #24 on: February 27, 2007, 04:46:40 PM »
That's wonderful Rosphere,

can you post a picture or graph?  I'm currious if the spikes look simular.

thanks for those links everyone,  interesting circuit isn't it? 

EM
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