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  1. k7elp60

    LED FLASHER

    I got the 0.602 by building the circuit, measuring the frequency and the individual components and plugging the values into formula.
  2. k7elp60

    LED FLASHER

    First let me apologize to Alun and others for any confusion my post of the formula to calculate the freqency.  As it turns out the formula is incorrect. When I did the calculation I got a negative number.  I knew that could not be right so I ignored the - sign. I did some checking and find...
  3. k7elp60

    LED FLASHER

    Audioguru is correct, I was having a brain cramp.  Increasing the value of the base resistor(39k) will decrease the flash rate. The 2ln term actually means 2 times the natural log of the result of  the  RC calculation. The circuit and formula is from my notes.
  4. k7elp60

    LED FLASHER

    I calculate the flash rate to be 2.012 Hz. The attached image and formula was used to calculate the flash rate. Reducing the value of the 10uF capacitor and increasing the value of the 39k resistor will increase the flash rate.
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