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  1. C

    Voltage amplifier Design

    "And I consider AC to be bipolar." It depends on if you expect the signal to have a negative excursion.
  2. C

    Voltage amplifier Design

    "That would be AC superimposed on DC." Not necessarily. There is no DC on a speaker. It would shift the cone.
  3. C

    Project at my lab(EE student)

    "May I suggest the op very probably meant "lit", not "lid". All my hard work, designing a servo controller to expose a LED . . . down the drain.
  4. C

    Voltage amplifier Design

    "Well, it states "... output at 1kHz...", that sure is AC for me. And I consider AC to be bipolar." What about all the thousands of 9v transistor radios you must have fixed. The output can be 1kHz. Where is the -9v battery ???? AC does not mean bipolar. It just means a waveform similar to a...
  5. C

    Project at my lab(EE student)

    You can say 1Hz multivibrator, 3v3 to 5v SMPS @2A 3v1 SMPS @1A or insert Schottky diode. You don't need to provide any parts specification, circuit layout, The only thing you have to provide is a LID. The LID is a motorised flap that opens when the voltage is just right and the GRN LED is...
  6. C

    Voltage amplifier Design

    "bipolar (AC) operation." No-where does it specify bipolar output. The output can be 20% distortion. There is no required specification on the distortion. "1.5V rms = 2.12V peak, much more than a typical LED will limit." Green LEDs go to 2.3v but two diodes will go to 1.5v The only...
  7. C

    Transformer question

    Yes. You can get 90% of 48 watts in any combination of volts and amps. I was thinking of a linear regulator.
  8. C

    Voltage amplifier Design

    The LED is to limit the output to 1.5v or you can put 2 diodes in the output.
  9. C

    Project at my lab(EE student)

    If it's just a block diagram, you can put anything.
  10. C

    Transformer question

    "then you can draw 90% of 2A." That's still 2A as an AC rating. So the output current is about 1.4A.
  11. C

    Toroidal transformers

    Get two identical 240v to 12v transformers and connect the 12v windings together. This will give you 240v and a small current capability. Connect the output to the primary of the toroid and measure the secondary voltages. This is the safe, isolating way to test it. Each kgm is about 50VA
  12. C

    Project at my lab(EE student)

    What you have been asked to do is very complex. To be dealing with 2 amps and converting voltages is a very difficult thing to do. This project is for finals exam 4th year student.
  13. C

    Voltage amplifier Design

    You will need 2 stage of amplification as a single stage generally provides a gain of 70 to 100. You don't know the input voltage. It may be 1mV or 5v p-p. It is going to very hard to accommodate the wide range with a general-purpose circuit, but here's an answer: You could try driving a LED...
  14. C

    1n400X complete datasheet

    "I'm trying to figure out the forward current when the diode voltage is 0.65V" Basically you are working around the wrong way. Generally we want to know the forward voltage when the current is 20mA, 100mA, 700mA etc.
  15. C

    Creating my own transformer

    Each of the laminations acts as a SHORTED TURN. This is something that no-one has ever explained before. Even though a shorted turn is considered to be a turn that has both ends connected together, each of the laminations is exactly like a shorted turn and to make this clearer we place a solid...
  16. C

    EMITTER DETECTOR SENSOR

    You only label a relay by the voltage needed to pull it in.
  17. C

    Holiday PCB production schedules?

    None of the PCB manufacturers are busy. There is no work being done. Everything is almost dead.
  18. C

    Dumb question re. simple inverter

    Remove R1
  19. C

    Creating my own transformer

    Making a transformer is much harder than you think. Yours will simply buzz and annoy you.
  20. C

    Motor question

    Put a 12v battery on it and see if it spins
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