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  1. Hero999

    How can I clean some dirty AC from my generator?

    Yes, alternators generally produce quite a clear sine wave.
  2. Hero999

    How can I clean some dirty AC from my generator?

    So it's a diesel generator, not gasoline. From what I've read, only large diesel engines don't have glow plugs but it doen't matter either way as glowplugs are just heaters ant don't produce any electrical noise. All gasoline engines have spark plugs which can cause electrical noise if not...
  3. Hero999

    [SOLVED] Dropout voltage concerns.

    THere shoud be no need for a voltage regulator for speakers which should be fine when operated from 10V to 15V. If you measure the voltage or the mains adaptor powering the speakers, you'll probably find that the voltage is probably higher than 15V.
  4. Hero999

    How can I clean some dirty AC from my generator?

    Please post a photograph of the waveform. Any petrol (gasoline) engine will have an ignition system, even if it has no battery. Diesel engines have glow plugs but no ignition system. An inductor is just a coil of wire, normally wound round an iron core to increase the inductance. Non-polarised...
  5. Hero999

    Is it possible ???

    It all depends on the required sound quality and how much experience you have. It's possible to use PWM from an MCU I/O port and a low-pass filter to get an analogue signal or build an R2R DAC from resistors but the sound quality won't be great. CD sound quality requires a proper DAC, an MCU...
  6. Hero999

    Is it possible ???

    To answer your question: it's definitely possible. You shouldn't need to use 50 ICs, unless you need to play them all at once of course, the data could all be stored on one flash memory device and played back through a DAC. There shouldn't be any need to use an MCU with 50 pins either...
  7. Hero999

    Plz help ! Reed switch fails within a few operations

    Have you tried putting the reed switch on the 24VDC side?
  8. Hero999

    Plz help ! Reed switch fails within a few operations

    I assume you're using 110VAC, the DC is a typo? Even if the steady state current is low, a large current will flow for a short time when the capacitor charges which is probably what's causing the switch to fail.
  9. Hero999

    USB to EIDE Converter

    I don't have the files, mixos posted them, not me.
  10. Hero999

    How can I clean some dirty AC from my generator?

    That's not too bad, it appeard to be EMI, possibly generated by the ignition system, rather than distortion which would change the overall shape of the waveform. A capacitor probably wouldn't do much because the imedance of the generator to high frequencies wouldn't be enough. An inductor in...
  11. Hero999

    EQUIVALENT TRANSISTORS AND FETS

    Try searching for 2SkK608 amd 2SK2545. And please don't spam the forum by posting the same question in several threads. Why did think asking the same thing over and over increases their chance of a helpful? Would you give a better answer if I asked you the same question several times? If so why?
  12. Hero999

    Step Up Battery Voltage Problem

    If you look at the Linear Technology, National and Maxim Semiconductor websites (Google them, if you don't know) you'll find a wizard to help you find the correct part. There's also a program which will help you to design the circuit.
  13. Hero999

    impedance matching transformer

    You need to have a peak voltage of at least 502V to get 70W RMS into a 180 Ohm load. The amplifier would have to be designed for 63kW RMS into 8R for that voltage. You won't be able to find an audio amplifier with that power level. You could use an impedance matching transformer with an...
  14. Hero999

    impedance matching transformer

    Does it need to be a sine wave? There are probably cheaper and more effective options such as an h-bridge IC designed for motor control.
  15. Hero999

    3v led chaser

    Hi welcome to the forum. Please don't make duplicate threads, I deletecd the other thread. Have you read audioguru's detailed explanation of how the circuit works?
  16. Hero999

    Need help in designing switching/chopping circuit

    A Reed switch is too slow. A MOSFET is probably the best solution but the inductor will need to have a supressor diode fitted. How do you plan to generate the 250Hz signal to drive the MOSFET? A 555 timer can be used but it needs a lower voltage power supply. You could use the LM317 to...
  17. Hero999

    SMPS with part No. HF100W-SB-13.8.

    Try the 2SK940. Have you tried tracing the PCB and reverse engineering the schematic?
  18. Hero999

    Amplifier for ISD module

    TDA7052 Datasheet linked below: http://www.kitsrus.com/projects/tda7052.pdf
  19. Hero999

    Voltage / Frequency Powersupply

    I thinkyour best bet is to reverse engineer the circuit. If you bodge something together yourself and it doesn't properly stun the chickens, you could have the animal rights people on your back.
  20. Hero999

    Power adapter jack 3.5mm to MicroUSB

    Are you sure the voltages are the same? I'd just buy a new adaptor or cur off the 3.5mm jack and replace it with a micro USB. This will only work if the voltage is the same and the new satnav doesn't use more current.
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