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Recent content by mechguy

  1. M

    Insert Image and animation with XAML

    Hello, Does anyone know how to insert image and animation by using XAML? How is the code looks like? Any help and suggestion is kindly appreciated. :wink: Regards, mechguy
  2. M

    byte programming with union function with C

    Hello everyone, Currently I'm doing an embedded project with byte programming with C. The following is the program: #include <stdio.h> void main () { long velocity; union { int NUMvelo; int byte[2]; } CURRENTvelo; CURRENTvelo.byte[0] = 200 * 256; CURRENTvelo.byte[1] = 130...
  3. M

    Measuring Irradiance with Photodiode

    To enjunear: I have been thinking of this assumption before. For your info, instead of just yellow sunlight emit to the photodiode's surface, we have to consider the surrounding light, especially from the blue sky in which the sunlight is scattered by earth's atmosphere, blue light is...
  4. M

    Measuring Irradiance with Photodiode

    Hi enjunear, First, thanks for you suggestion. I have also thought of the equation which you suggested to me. I can get the value Ee (irradiance) after measuring Irms (photocurrent) with an ammeter, or using the equation Vout / R1. However, for Responsitivity value (or Sensitivity as shown in...
  5. M

    Measuring Irradiance with Photodiode

    Hello, I have a project to build a photodiode circuit with microcontroller to measure solar irradiance. The function of OpAmp is to limit the analog voltage to A/D converter, as shown in attached picture below. Vout will be connected to A/D converter (Vout = Ip * R1). My problem is, how to...
  6. M

    Problem with OpAmp Simulation in LTspice

    Finally, my problem is solved: 1. It's my carelessness for the equation, yes it's 3.6k. 2. I've changed my voltage supply inversely. 3. I apply double voltage supply to OpAmp. The output voltage is + 2.5V. Thanks for your helps!
  7. M

    Problem with OpAmp Simulation in LTspice

    Hello, Recently I have some problem with simulation in LTspice for operational amplifier (inverting amplifier) circuit. The source voltage and first resistance before opamp is 9 V and 3.6m ohm. The second resistance is 1k ohm. So, the expected output voltage should be Vout = 9 / 3.6m* 1000 =...
  8. M

    OP Amp Frequency Calculation

    hello, Does anyone know how to calculate the frequency of op_amp as photo attached below? Any help and suggestion is kindly appreciated. Thanks!

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