Recent content by Virus

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    555 HV FB

    Hero999 I have got it this far, please see attached, Any suggestions on this, Can the OPTO be turned on more gradually (or is it only on/of like shown), it will allow for a faster charge to get to 550v in 4.7 msec needed, but then it needs to flatten out faster and not still rise on the out...
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    555 HV FB

    I have looked at LT3751 chip designed to do this fly-back circuit, the data sheet circuit is running nice in LT spice, but I could not get a bread-board or a fully built pcb version to work, (lease see attached) So KISS is the next step using a 555 timer. Thanks Virus
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    555 HV FB

    Hi Guys I need a circuit that can charge (1 or 2) - 2.2uF cap(s) to 550v in ±4.7m sec. I do need the pri and sec grounds to be isolated. This circuit does a good job ( according to LT Spice) please see attached, but I need to replace Q2 with an OPTO to get the isolation as needed and would...
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    Proteus Help needed

    Hi Guys I have downloaded the IR2110 model from IR's site - http://www.irf.com/product-info/models/sim/index.html How do I get the IR2110 model into Proteus, to simulate a circuit. Can you refer me to a tutorial or pdf, that can assist me in this. Thanks Theunis
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    Some transformer advice/help required

    Hero999 With the diodes I took a wild guess, about the retarding the timing- I am totally in the dark, you will need to point me in a direction please. With timer you maybe mean a 555 chip. Please Theunis
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    Some transformer advice/help required

    Hero999 I know you are not a mechanic you are a Electronics god, that is why I asked the question, I mean can it be retarded/delayed electronically even made adjustable and how, one will still have the normal/mechanical advance and retard, but there should be a way to retard the timing every...
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    Some transformer advice/help required

    Thank you Hero999 I will be at it this weekend, and see how far it will go, If I need to retard the ignition pulse/timing a little, which would be the best way to do it. It was mentioned that the CDI could advance the timing because of the fast discharge? Thank you Theunis
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    Some transformer advice/help required

    Hi Hero 999 Please be patient with me I am a rookie at this  ;) For all intensive purposes you can then charge multiple caps as long as the supply is capable delivering ? Thank you for the feedback Theunis
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    Some transformer advice/help required

    Hero999 Ok. that would help. can I ask you for a diagram, I need to see how to connect the diodes, hand drawn will be just fine, if it's not to much trouble. Thank you Theunis
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    Some transformer advice/help required

    Hi Hero999 Attached 2 x jpg's, 1st the original schematic (I have changed the number of turns on the transformer Primary = 13 turns and Secondary = 360 turns), 2nd jpg (simplified circuit) is what I have in mind, I did think that it should be possible to charge the caps using diodes but no...
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    Some transformer advice/help required

    Hero999 Thanks for your response, I need the caps to be isolated from each other, with common negative after each has been rectified, as each cap will be discharged separately,  I did wind the secondary 2 wires is parallel simultaneously, but the transformer seems to heat up fast, and wonder...
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    Some transformer advice/help required

    Hi guys/galls Would appreciate some advice.  ;D I intend to build a cdi circuit for my car, but with a slight difference and need some advice on a modification on the transformer. I need to charge 2 x 1 uF caps at the same time, normally the transformer would be 1 primary and 1 secondary...
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    Help with PWM - SG3524N pinout

    Hi Guys This is what I have figured out from the datasheet so far, also must some of the other pins not used be tied to ground or positive rail. Please correct me here. Virus
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    Help with PWM - SG3524N pinout

    Hi Guys Long time no post ! Attached a schematic from a patent that I want to build, can anyone please help me with the pin numbers on the PWM - SG3524N chip for the corresponding connections to the chip as shown, before I start making a PC-board. ??? Thanks Virus ;D
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    Some brain draining needed, thanks

    Hi Is this circuit layout beter! Can you please take time look at this circuit and give me some contructive advice. Any one please ? Virrus ;D Mag_pulsar_240v_3.PDF
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