Relaxation oscillators select resistors

Question

Every circuit diagram of a relaxation oscillator says I have to put a 100 ohm resistor between the capacitor and the voltage source like this:

^{simulate this circuit – Schematic created using CircuitLab}

But I think it would be better to use an 1000 ohm resistor instead of a 100 ohm resistor. This would discharge the capacitor at a slower rate and give me a lower frequency.

What do you think?

^{simulate this circuit}

Answer 1

I presume your "Zener" K-A is actually something like the E-(B)-C pins of an NPN BJT.

Try this out in real life (I don't think this will simulate).

I think you'll find if you increase the resistor too much, the relaxation oscillator will be very relaxed indeed and will 'stick' after the first breakdown.