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  1. Arouse1973

    ring oscillator with stable frequency

    Adding capacitors won't this also reduce the harmonic content and possibly produce a more sinusoidal wave shape? Adam
  2. Arouse1973

    Voltage from rotation

    Can you show me the electrical circuit you think will be the final design? Adam
  3. Arouse1973

    atmega328p Arduino

    Ok no probs. Adam
  4. Arouse1973

    Voltage from rotation

    You could add some circuitry to do this like a diode. Adam
  5. Arouse1973

    Driving a DCC model railway track with +/- 15V

    Hello Can you just clarify something? Do you want the signal to go from 0V to +15V and then switch to 0V to -15V or go from 0V to +15V back to 0V and then to -15V. Thanks Adam
  6. Arouse1973

    atmega328p Arduino

    What about a breakout PCB? http://www.adafruit.com/product/1163 Adam
  7. Arouse1973

    Noob Question About Current From Voltage Regulators

    Greek letters, me to.... don't even go there, and then they use lowercase just to confuse you :) Adam
  8. Arouse1973

    BNC connectors: 50 or 75 Ohm?

    If you look at the ends of the connectors is the white dielectric different? Are there any that don't come to the top of the fingers? Adam
  9. Arouse1973

    Voltage from rotation

    Here is what I mean. The brown rectangles are the coils and the grey ones are the magnets behind the coils. Adam
  10. Arouse1973

    Do i need resistors?

    That narrows it down a bit :) Can you send me a link? Adam
  11. Arouse1973

    Voltage from rotation

    Have you turned the coils and magnets yet? Adam
  12. Arouse1973

    Do i need resistors?

    What LED are you using. It's just you might not have enough voltage to run the Green and Blue LEDs as Jerid mentioned. The Red will need a resistor not because it may be damaged but it will be a lot brighter than the others and may swamp the other colours. Adam
  13. Arouse1973

    Begginer help please.

    Have a look for blown fuses and any signs of components overheating or burn marks, have a good sniff. Also check for swollen or bulging capacitors they seem to be a common problem in power supplies. But be very careful where mains in concerned. Always work with the TV plugged into an RCD when...
  14. Arouse1973

    Measuring small currents (microamps)

    You are also driving the output of IC1 into 0V. I assume you were trying to create a midpoint of the supply? All you are doing with IC2 is switching the output into saturation. You need to be measuring across the load resistor with an op-amp that has rail to rail inputs. But also make sure the...
  15. Arouse1973

    Is this a ceramic capacitor and is it bad?

    Do any of the other capacitors have ferrite beads around the legs? The glue is to stop the ferrite beads from moving due to vibration and shock. This could possibly damage both the legs of the component or the ferrite beads themselves. Thanks Adam
  16. Arouse1973

    Is this a ceramic capacitor and is it bad?

    Yep!
  17. Arouse1973

    Voltage from rotation

    Looking at your drawing again. You need to make sure the coil passes through the magnetic flux of the magnet. It difficult to explain. I may have to do a drawing. Adam
  18. Arouse1973

    Noob Question About Current From Voltage Regulators

    Kris answered this correctly. Adam
  19. Arouse1973

    Voltage from rotation

    Its all about number of turns and surface area. Adam
  20. Arouse1973

    Voltage from rotation

    At the risk of my idea being diluted by other great ideas.More voltage will be induced in the coil when the magnetic flux changes in strength over a period of time. The magnetic flux should pass through the coil which is why I said about turning the coils and magnets. Adam
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