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  1. Arouse1973

    Fuel Gauge converted to Volt Meter

    Nice work Bob. Quite a bit to digest :eek: I'll study this in more detail later. Adam
  2. Arouse1973

    Is this layout good for a DC-DC converter?

    Post the circuit digram also. Adam
  3. Arouse1973

    Slim Motor for electric Fan

    Bob well I never new about pancake motors until you mentioned it. Thank you Adam
  4. Arouse1973

    Is this layout good for a DC-DC converter?

    Where is the inductor?
  5. Arouse1973

    12V - 36V 30mA Converter using LT1173

    But smps do have more ripple. You dont think your expecting too much. Try this put a 100R and a 100uF cap on the output. Connect the resistor to the output and the cap from the other side of the resistor and then to 0V. To form a lowpass filter. Adam
  6. Arouse1973

    Fuel Gauge converted to Volt Meter

    Its like riding a bike you soon pick it up again. Adam
  7. Arouse1973

    Fuel Gauge converted to Volt Meter

    Thanks Bob. I thought he wanted a few steps to switch automatically in. How can one opamp do this without intervention? Thanks Adam
  8. Arouse1973

    12V - 36V 30mA Converter using LT1173

    Lol It is now cool :)
  9. Arouse1973

    Fuel Gauge converted to Volt Meter

    Oh sorry I thought you had knowledge of electronics. To what level would you say you are? I will look at a circuit for you if you are not comfortable with this. Adam
  10. Arouse1973

    Fuel Gauge converted to Volt Meter

    What about a battery level monitor made from op amps which switches in a different value resistor using say a MOSFET depending on the voltage level. Adam
  11. Arouse1973

    Power source help

    No probs Kris. I thought you might have a giggle at that :) Cheers Adam
  12. Arouse1973

    Fuel Gauge converted to Volt Meter

    So the fuel sensor is connected to a 5 Ohm resistor and this is what produces the voltage level needed by the cluster? Adam
  13. Arouse1973

    12V - 36V 30mA Converter using LT1173

    Cool :)
  14. Arouse1973

    Power source help

    This might help? Not very good at drawing sorry :) Adam :)
  15. Arouse1973

    12V - 36V 30mA Converter using LT1173

    The reference design in LT Spice uses significantly higher feedback resistors. Why have you chosen such low values? You are wasting approx. 30 mA in the feedback network, why? Adam
  16. Arouse1973

    Help with frequency divider

    I think your right Harald. I always prefer to just label the supplies +12 V +5 V and 0V etc. for most of my stuff. I think this stops confusion. But that's just my choice, Vdd and Vss are meaningless on a diagram because you don't necessarily know what the voltage is. Adam
  17. Arouse1973

    Light measurement

    Sorry I didn't understand your question. What do you mean insensitive? Adam
  18. Arouse1973

    Power source help

    Beat me again Kris :)
  19. Arouse1973

    Power source help

    Yes that's how you do it. Set the meter to read D.C volts that would include the 12 Volt level. If you get a -12 Volt reading with the red lead connected to the centre pin then the connections are opposite to what you have noted and the middle pin is 0 V. Assuming you have them plugged in...
  20. Arouse1973

    common emitter amp design

    Thanks for that Kris Adam
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