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  1. ramussons

    Hacking a microwave oven

    The microwave oven has presets ( i guess that's what you are referring to) that are programmed in a chip. You will have to re program / replace those chips.
  2. ramussons

    Common Cathode Triple digit display pinmap help!!!

    Trial and Error is a sure method. Takes time and patience. But can be done.
  3. ramussons

    series parallel RC circuit help

    A capacitor that's fully charged has Infinite resistance. Presume that there are no capacitors, calculate the voltages at the various Nodes. Those Voltages will be the same after "All the Capacitors Have Fully Charged".
  4. ramussons

    Selector Button

    Since you want to count upto 3 (for the 3 options), you need to have a 2 bit binary counter whose output ( 00, 01, 10, 11) can be decoded to the chosen option. A CMOS chip 4511 should help you thru'. http://www.doctronics.co.uk/4511.htm Just ground the Inputs C and D.
  5. ramussons

    Battery cells paste

    Sorry, your question is difficult to understand. Can you explain your doubt a litle more? What do you mean by "Battery Cells Paste"? Are you referring to the "paste" that is inside the normal Dry Cells? That is Ammonium Chloride with Manganese Dioxide.
  6. ramussons

    Ethernet to fiber optic converter

    AFAIK, there is no "Single" IC for this conversion. You can get Modules for this. Google for "ethernet to fiber media converter"
  7. ramussons

    smps

    Google is your friend. http://www.datasheetspdf.com/datasheet/download.php?id=635051
  8. ramussons

    Determining the Inverter DC Voltage input Limit

    What is the output voltage supposed to be? 110? 220? Once you know that, give an input starting with 6 volts, go to 12, 24, .... till you get the output voltage. That will tell you what the nominal input voltage.
  9. ramussons

    Software to control COM or Parallel port pin output

    Does this help? http://electrosofts.com/parallel/
  10. ramussons

    Can a clock pendulum be slowed down by adding a resistor to the PSB?

    There IS a solution - a Compound Pendulum. A simple rod pivoted at its centre will not swing, but if the pivot point is shifted, it will. http://farside.ph.utexas.edu/teaching/301/lectures/node141.html
  11. ramussons

    How many amps can I pull from my battery?

    300 mA. That's a 10 hour discharge rate.
  12. ramussons

    Bore pump start capacitor

    The Capacitor inside the sealed motor will have at least 1 connection that is NOT accessible from the outside unless you open the motor - in which case you may as well replace the capacitor.
  13. ramussons

    Home made inverter...

    Sorry AnalogKid, I was'nt contesting you :D. I agree with what you say. I was only suggesting to the OP that the Amplifier needs to be PWM based to take care of losses as mentioned in my first post. Invertors of 50 or 60 Hz are basically Class D amplifiers.
  14. ramussons

    Home made inverter...

    Yes, and you design a Class D power amp - that's basically a PWM switching.
  15. ramussons

    Home made inverter...

    If the idea is to charge mobile phones from a 12 volt battery, why go through this complicated process? You can buy mobile chargers working of 12 volts (look for car phone chargers) that serves your purpose. If you drive the FET's with a Square wave, your transformer will have Eddy Current...
  16. ramussons

    Help with a flasher circuit with 555 Timer IC

    You are likely to burn off the B-E junction of your transistor.
  17. ramussons

    Audio amplifier from biased square wave

    If you drive a speaker from a "biased square wave", you will generate a sound. Is'nt that what you want? o_O A capacitor will block the DC. Or are you planning to make a wide range Sine Wave Oscillator? Then there are other ways to go about it.
  18. ramussons

    Need help identifying this part

    I also go with and also where did this part spring up from ....
  19. ramussons

    Information about power IC

    How do you know it's a power IC? How will a Mosfet replace the IC? No, you are not likely to get any help this way. If you give details of the motherboard along with photographs of where on the motherboard is this IC placed, there maybe someone who can throw some light on its replacement...
  20. ramussons

    Information about power IC

    To start with, how about info on its use. Where is it used. What it looks like, a photo.
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