Hey,
I'm looking for a way to build a frequency generator that's variable in the low Mhz range.
Application is for the main frequency generator of a class E solid state Tesla coil driver. I have a rough idea of what the resonant frequency will be, but it would be nice to have some variability on the control side instead of always adjusting the # of turns on the secondary to change Fres.
CMOS 555 timers can do ~3MHz astable but that's really really pushing it. Any other ideas? It can be square wave, sine wave, whatever - and duty cycle doesn't really matter, so long as the fundamental frequency/period is correct.
And I guess it doesn't need to be variable over that total range (1-10MHz). If I could be able to adjust it from +/- 25% from a center frequency, or even +/10%, that might work too. I won't know til I wind it and fire it up and start drawing arcs what kind of frequency shift and error I might have vs. my calculations.
Any ideas? Thanks!