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Thread: SG Oscillator Questions

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    SG Oscillator Questions

    Quote Originally Posted by John_Koorn View Post
    bluestix, that is why you should try the self-oscillator circuit. Study this patent, figure 4 is the circuit I'm talking about:

    Patent US7990110 - Circuits and related methods for charging a battery - Google Patents

    you can then adjust the main base resistor for different sized batteries. If you get real clever with the chip you could switch different resistors in and out.

    To monitor the battery voltage you will need to learn how to use the ADC inputs on the PIC.

    John K.

    Hi John K.,

    I have examined the patent and looked at the Fig 4 schematic. What are the component values? Where is the coil that was show in a video Bedini posted in the SG Oscillator thread?

    I want to use the SG oscillator to charge the Lead Alum batteries.

    Sincerely,

    //teej_seeker

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    Senior Member John_Koorn's Avatar
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    Quote Originally Posted by teej_seeker View Post
    Hi John K.,

    I have examined the patent and looked at the Fig 4 schematic. What are the component values? Where is the coil that was show in a video Bedini posted in the SG Oscillator thread?

    I want to use the SG oscillator to charge the Lead Alum batteries.

    Sincerely,

    //teej_seeker
    t_s, from memory the component values are in the text of the patent.

    John K.

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    Quote Originally Posted by John_Koorn View Post
    t_s, from memory the component values are in the text of the patent.

    John K.
    John K,

    I just checked the patent. the component values are not there. :-)

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    Senior Member John_Koorn's Avatar
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    t_s, sorry about that, must've been another patent. The base-collector is 18K and the base-emitter is 10K. The base resistor - 2K will get you in the ball park but you use this to tune the oscillator.

    These are really questions that should be in the SG Radiant Oscillator thread.

    John K.

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    Quote Originally Posted by John_Koorn View Post
    t_s, sorry about that, must've been another patent. The base-collector is 18K and the base-emitter is 10K. The base resistor - 2K will get you in the ball park but you use this to tune the oscillator.

    These are really questions that should be in the SG Radiant Oscillator thread.

    John K.

    Hi John K.

    Thanks for your reply, and thanks for moving my query to the correct thread. How are the coils wound? If i am correct, it is 40ft of 21 AWG with 7 conductors including 1 for trigger. Am i correct?

    sincerely,

    teej_seeker.

  6. #6
    Senior Member John_Koorn's Avatar
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    teej,

    What are you going to charge with it?

    John K.

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    Quote Originally Posted by John_Koorn View Post
    teej,

    What are you going to charge with it?

    John K.

    John,

    For now, a 12V 7AH battery. Eventually, I will need a bench power supply.

    Teej_Seeker

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    John K,

    Referring to Fig 4 of the Bedini patent, am i correct in stating that the base resistor is #76, the base-emitter resistor is #74 and the base-collector resistor is #78?

    teej_seeker

  9. #9
    Senior Member John_Koorn's Avatar
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    teej, the base resistor is #78, the base-emitter #74 and the base-collector is #76.

    I would start off with a bifilar coil of 125' of #19 for the trigger and #18 for the power winding. Get it running and study it first before moving into larger setups.

    John K.

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    Quote Originally Posted by John_Koorn View Post
    teej, the base resistor is #78, the base-emitter #74 and the base-collector is #76.

    I would start off with a bifilar coil of 125' of #19 for the trigger and #18 for the power winding. Get it running and study it first before moving into larger setups.

    John K.
    John,

    Thanks for the information.

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