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Recent content by aamit4

  1. A

    calculating voltage at base

    Thanks dick_freebird for your input. Assume the off page branch is not connected to anything. here the modified image. thanks
  2. A

    calculating voltage at base

    Hello: what would the Voltage at point "E"? How would i calculate voltage at point "E"? Thank you
  3. A

    Android based Embedded System

    Thank you, ftsolutions and Surender Reddy for help. Surender, I want android os based ES. Are there anyone who makes with preloaded Android OS? I also like to have integrated WiFi if possible.
  4. A

    Android based Embedded System

    Hello, I'm new in Android and embedded system. I am looking for Android Embedded system W/LCD. Can anyone point me to right direction to look for one? I am also looking any standard peripheral that comes with embedded systems. Thank You
  5. A

    circuit oscillation while laptop AC is connected

    GoldSmith, I can't see those noises on oscilloscope becasuse as soon as i connect my ground lead it will stop oscillating.
  6. A

    circuit oscillation while laptop AC is connected

    The circuits works fine without AC adapter connect to Dell laptop. The problem is when AC adapter is plugged into the laptop. So, i far i have tried two Dell laptop. One is Dell Latitude E6410 and second is Dell Latitude D620. It will also works fine when it is connected to desktop and...
  7. A

    circuit oscillation while laptop AC is connected

    Thanks Goldsmith for your input. So, i have tried two different laptop and adapter but same results. i tried build EMI filter with inductor and Cap, but didn't work. I guess i need to built better EMI filter. Any idea on EMI filter. Thank You.
  8. A

    circuit oscillation while laptop AC is connected

    I have a circuit that would run on voltage from serial cable. While my laptop is connected to AC power; the circuit would output garbage data into hyperterminal; but it would work perfectly when laptop is not connected AC adapter and running on battery. Can anybody help me with this? I would...
  9. A

    Slew rate of op amp Slew rate of op amp

    Hello, can anyone tell that whiich op amp would be faster in terms of "Slew Rate"? MCP602 has slew rate of 2.3V/us, MCP 3.0V/us and MCP6041 3.0V/ms. Thank you.
  10. A

    photodetector or Ambient light sensor

    BradtheRad and keith1200rs,tThank you for your help. I have changed my circuits little bit. see the image. Now, i'm seeing my amplified signal and bias point is 2.5v. But i still want to amplified further. Do i need to add coupling capacitor for the next stage? would it be fine if i...
  11. A

    photodetector or Ambient light sensor

    Hello, I am trying to build phototdetector circuit that would detect blinking LED, that's the data. I am using ambient light sensor from Visay (TEMD6010FX01)and MCP602 single supply op-amp. My circuit would work without biasing non-inverting(+) pin such as at mid-supply (2.5V). But, when i...
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