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Recent content by mngeow

  1. M

    Problems with Fourier Transform

    Hi , I'm having problems with this fourier transform question from school. If the Fourier transform of v(t) is V (f), show that the Fourier transform of e(j2ft) * v(t) is V (f − f0). I know that the fourier transform of e(j2ft) is d(f-nfo) , where d(f-nfo) is a unit impulse centered at -fo...
  2. M

    Questions on power supply

    I've recently begun my lab sessions and begun using the DC power supply. There are a few things that I'm curious about. Firstly , what is the maximum output current and voltage achievable by the DC power supply? I'm afraid to just crank up the voltage and current knob all the way , don't want...
  3. M

    How to use a cell phone bluetooth interface with a microcontroller?

    Re: School Project Would it be easier if I use the bluetooth device installed inside my handphone?Found alot of posts on the forum using this.
  4. M

    How to use a cell phone bluetooth interface with a microcontroller?

    Re: School Project Hi sorry I haven't replied in awhile,been busy with examinations.Exams are over!*But I still have this project :cry: * Anyways is there something like a circuit diagram that would help me? http://www.iearobotics.com/personal/ricardo/proyectos/skybluetooth/docs/wt11.pdf I...
  5. M

    How to use a cell phone bluetooth interface with a microcontroller?

    Re: School Project "First u should be through with the bluetooth and its pairing with other devices..."? What do you mean?Our device is designed to operate within a short distance of about less than 10m.
  6. M

    How to use a cell phone bluetooth interface with a microcontroller?

    Re: School Project Well it is a prototype,so i guess it doesn't have to be long range for the prototype.But is there anyway to extend that range?
  7. M

    How to use a cell phone bluetooth interface with a microcontroller?

    Ok so I have this school project in which I'm supposed to design and build something related 'Home Security'.Anyways I'm abit lost,my prototype is supposed to work this way : when I press a key on my cell phone,a bluetooth device will send a signal to a microcontroller(MCT).After that 2 active...
  8. M

    Help with time delay using D f-f

    Hi i'm looking for a 5sec time delay,would it be too much trouble if you could send me a diagram as well?It'll be easier for me to follow.Thanks alot! :D
  9. M

    Help with time delay using D f-f

    Help with time delay Hi guys,is there anyway I could get time delay using D Flip flops?I've tried googling it but all I get is info. on 555 IC timers.
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