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  1. K

    Buck Converter Design Problem

    The input voltages are very high, making the control circuit difficult to design. An ordinary opamp and PWM couldn't be used. The main pass transistor should be a low on Vds FET or bipolar transistor operated between cutoff and saturation to achieve higher efficiency. The inductor capacitor...
  2. K

    5V Inductive Charger Design

    An opamp can be used out of saturation to amplify a digital signal. A very high gain, which would not be needed with the 12v signal from the pulse width generator, would be less stabile.
  3. K

    5V Inductive Charger Design

    A sort of variation of a buck converter could be used in this case. A simple fixed pulse width generator can allow the control opamp to supply input to a regular 5V voltage regulator. An electrolytic capacitor would be needed at the input to the regulator. The opamp could be made stabile enough...
  4. K

    5V Inductive Charger Design

    Indulis, are buck converters used very often? They're not standard regulators which I have seen more often. Maybe they can only be used for certain applications.
  5. K

    analog ammeters

    Are analog ammeters worth purchasing? I'd like to buy a few low current ones. I've never seen them used in low current circuits.
  6. K

    Christmas Lighting Ideas

    That's a good question. I've seen those flashing light displays at Christmas time. A specialty store of some sort if you can't find them at the local stores.
  7. K

    High Voltage (2 Kvrms) shielded cables

    200m of cable carrying 2 KVrms sinewave at 2 KHz requires only a small guage stranded wire.
  8. K

    how this H-brigde is working?

    Looking again at the design, the ground symbol is very similar to the the voltage source signal. So the design isn't over engineered and is a basic H-bridge. It has two main series circuits which supply voltage to the device. Only one of the series circuits is used at one time. The desired...
  9. K

    how this H-brigde is working?

    The circuit looks alright. Input A and input B are not specified, but the circuit is much over engineered and needs simplification. What type of device uses this?
  10. K

    IC compatability

    Many analog IC's require very large external design to be compatible with a system. Aren't there more variations to IC's that are more useful and less accurate? The whole of the circuit design is very limited. Not knowing much about the availability, are there more manufacturers with better...
  11. K

    5V Inductive Charger Design

    Another aspect, is not only will the 5v charging system need to regulate at 5v, it must also not overcharge a low battery to quickly. The same as the slow charge fast charge switch on an automobile battery charger.
  12. K

    5V Inductive Charger Design

    A 5v charging system, I'll guess to charge a 5v battery, will include resistors and capacitors too. The idea is to start with a higher voltage and a regulate the ouput at 5v. Automobile battery chargers are suited for general auto battery charging, while others are designed to charge less...
  13. K

    detect pulse of 140ns and 50mv.

    What is the circuit generating the pulse? Digital electronics produce pulses at 5V and maybe 3.3V. 140ns eliminates many integrated latches which operate at logic levels. It's possible even a latch at 140ns will not trigger with the circuit supply voltage.  I'd use a use a two stage high...
  14. K

    0-30 Vdc Stabilized Power Supply

    There is nothing wrong this stabilized 30Vdc power supply. Having not tested the orginal circuit, it must be a good design, or it would not be posted. Since it's a good design, but doesn't meet your requirements, a totally new design is needed. The engineering principle behind this design is...
  15. K

    voltage amplifiers

    Integrated amplifers have become synonymous with circuit development. Their gain or their function is excellent as is shown by specification. But most designs are very large and dependent. Do you guess on which IC might be the right one?
  16. K

    Help with voltage regulator

    Another thing to consider is the ability of solar panels to be used with reactive loads. If they can, the apparent power consumption will be an additional loss in power transfer. You must have a good size and expensive solar panel. I wouldn't risk in damaging it.
  17. K

    Help with voltage regulator

    No. The voltage regulator can be any high current 12v regulator. A very efficient DC ro DC converter has to be used to increase the power efficiency of a circuit powered by a solar panel, and that may not even be efficient enough.
  18. K

    12v to 230 volts dc with voltage doubler circuit its possible?

    You can't mean a high current voltage multiplier can't be designed from an oscillator. Many high power oscillators use low power oscillators which again get power gain. You can't use electrolytic capacitors because their voltage rating is too low. The inverter designed using a voltage multiplier...
  19. K

    12v to 230 volts dc with voltage doubler circuit its possible?

    Capacitors are good power transmission components. But electrolytic capacitors, which have the most capacitance, are low voltage. You can combine numerous electrolytic capacitors and achieve a very high current. The NE555 timer can be used or another IC or circuit.
  20. K

    Types of nonlinear loads?????

    Simple nonlinear loads can be found in many components. Most of the time, large transistor based circuits are used. Nonlinear loads are really important in circuit development.
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