So I am trying to develop a saw tooth generator using a 555 timer however I have a couple of problems regarding the calculations. The saw tooth generator is built in this way:
The mathematical way to describe the behavior of this is by the following formula: F = (Vcc-2.7) / (RCVpp)
where Vcc is the voltage from the power supply, R stands for Resistance, C for the capacitor and Vpp for the output voltage of the wave generated.
My problem is that I need the saw tooth wave to last 60 seconds which is 0.016 Hz, a really low frequency, also it will use a 12V power supply. The voltage Vpp I have no idea how to find it and it is exactly the value that is affecting my circuit. According to my research the Vpp value comes directly from the input voltage used, this means the R and C values won't affect it, therefore I can't use the equation to Vpp's value. How can I find the Vpp value?