Capacitor help (sawtooth signal)

[danielclark]

generating saw tooth signal

Hi guys, I am using a PIC Micro to generate a signal of 11hz per second (i.e. it pulses 0 and 1 eleven times per second), which will generate a squarewave signal.
I want to modify the signal to output a 'sawtooth' signal. How do I calculate the capacitor value to use?

Is there a formula to use where I input Voltage, frequency etc.

Thanks

 

[kronos2k3]

generating sawtooth signal

Hi!
Only use a integrator construct with OP-AMPs.
See this: http://www.ecelab.com/circuit-integrators.htm
Good luck!

BR!