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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

    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 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 there, I have built the attached circuit found on the web, purpose of the circuit is to develop a electromagnetic pulse in an air coil using 240v AC, and it is not working. I can
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    VCR - BLDC Motor Controller

    Hi All Can anyone please help me with a simplified but complete controller to control a VCR head motor. 3 phase DCBL motor controller.
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    How to simulate the heat generated in side a PC-case.

    Hi guys I have a PC power supply in side PC case. NO other components. I need a resistor or something ells, that I can connect to the power supply in the case that will generate the same amount of heat or even more inside the case, (should it be a fully functional PC).  I was thinking in the...
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    HELP - resistors and dip-switch

    Hi Guys A million dollar question, and please I need help with this one. I know a little about ohm’s law etc. but still can’t figure this one out. Being a non electronic tech and wanting to build a fan controller and I need some expert advice. In the circuit I am building I am using a 10 k ohm...
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    Emulate a 10k thermistor

    Hi Guys I need a circuit that would emulate a 10 k ntc thermistor, for the sake of endurance testing a product. As temperatures vary the thermistor will follow, by changing its resistance up and down between
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    Small electronics production wanted

    Hi Guys Does any one know of a small electronics production company that can help me produce small pcd boards 1 sided,
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    Testing Mosfets

    Hi guys Is there a way of testing a IRF510 mosfet to determine if it is blown or not. I believe these things can blow with static, etc.  I am building a circuit from a diagram with not much knowledge of electronics, and need to make sure of the Mosfets. Thanx Virus ;D ;D ;D
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