/diy/ - Do It Yourself

>>1842634
>some IC that spits out a triangle wave
Not what I was talking about. Pic related.

>>1842665
I was going to suggest that, but there's a slightly better circuit than that. IIRC, the circuit you posted has an amplitude that's dependant on frequency (because of the integrator), but there's a design that uses the integrator as a part of the oscillator that avoids this issue. Pic related.

Just add an inverting amplifier for variable gain and variable DC shift on the end.

>>1089328
This requires less components, particularly with a dual opamp. And even if it didn't, sine is still an awful compromise.
Okay, it's actually a triangle wave oscillator, but triangle works better for PWM than sawtooth.

If you insist on sawtooth, it is possible to do with a 555 and some discretes. Total component count will still be less. Even less components are needed if somewhat mangled waveform (part of exponential) is ok.