Andrés Valenzuela said:
Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
heres a very simple function generator using opamps. I used a TLO-72
but you could use a couple of 741's too if you got them hanging
around. I think they'll do fine.
The first part is a non inverting schimtd trigger used to generate the
square wave, the second part is an integrator which will convert your
sqaure wave into a triangular wave. then add a couple of filter
sections to get the sine wave. if you dont need the triangular wave
then you can skip it and just add more filters and get your sine wave
directly out of the square wave.
note: This is for a 1000hz generator change resistor
and capacitor values as needed.
you will need at least 3 filters to get a decent
sine wave maybe even 4 or more for a really clean
wave.