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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by lmartinel

  1. L

    sawtooth Generator Circuit

    It will be for a pure DC to AC power inverter. I built one in the past but it used a lot of microchips. I now would like to build one by using all discrete circuits. It is fun.....Thank you for your responses:)
  2. L

    sawtooth Generator Circuit

    Sawtooth wave - Wikipedia, the free encyclopedia Pulse-width modulation - Wikipedia, the free encyclopedia I completely understand the contents within the links given above. However, it has been a while since I design discrete circuits to accomplish the periodic waves shown in the links...
  3. L

    time to be realistic

    Set a goal and go for it.
  4. L

    sawtooth Generator Circuit

    I would like it to be perfect. It should be at a frequency of 500k Hz. It will be used to compare it with a low frequency sinusoidal signals to achieve a pwm output signal. So far I am still working with the sawtooth. I am knowledgeable with pic pic16f690 andpic16f887! Thank you
  5. L

    sawtooth Generator Circuit

    I appreciate your responses. I tried the previous circuits provided but as you all know they are not a very good sawtooth generator. However, I am exploring the one below. It is good up to 20k Hz but beyond that point the signal dies completely out. I will keep on working on it. Any help will be...
  6. L

    sawtooth Generator Circuit

    This circuit is not being close to being a perfect sawtooth..Can someone help.....:mad:
  7. L

    sawtooth Generator Circuit

    HOW!!!!!! Is the circuit made out with a 555.....
  8. L

    sawtooth Generator Circuit

    Thank you for your feedback:):):):):):):):):):):)
  9. L

    sawtooth Generator Circuit

    hey guys, Does anyone of you may be able to provide a simple discrete circuit for a sawtooth circuit....500k Hz frequency with a variable amplitude. I have done my research but have not found a reliable one. thank you
  10. L

    Why the voltmeter Shows this?

    Mathematics is a wonderful tool to understand the complexity of the electrical behavior of a capacitor. The voltage across the capacitor is governed by V = Q/C where Q is the charge and C is the capacitance of the capacitor. The capacitor has not been charged. As a result, the charge on the...
  11. L

    Assembly Code Help. Pic 16f690

    Thank you very much guys for all of your help.
  12. L

    Assembly Code Help. Pic 16f690

    Do you know the details of how the process takes place? Please advice
  13. L

    Assembly Code Help. Pic 16f690

    Hello everyone: I am having a difficulty understanding what the following assembly code does: bsf TRISA ^ 0X80,0 I comprehend that bst TRISA, 0 is enabling port pin AO as an input, but what the effect of ^0X80 is not understandable to me. Can anyone of you sharp guys help me. Thank...
  14. L

    Delay C-code for Pic 16F690

    Can you provide a simple delay routing with the _delay_us macro. Thank you
  15. L

    Delay C-code for Pic 16F690

    I am using the following code for Time Delays when programming the Pic 16F690. However, I am not totally understanding how it works to provide the time delay. Can anyone of you be so kind and explain it to me in detail how it works? // Using Internal Clock of 8 Mhz #define FOSC 8000000L...

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