How do I make a voltage controlled capacitance multiplier set the frequency of an oscillator

130

00:42:05

I'm trying to learn some basic electronics, I come from a music background, so please keep it simple, I just want to make some blinking lights and fun tone generators along the way.
How can I implement voltage control capacitors to make simple oscillators tuneable?

published 1 year ago

ViolationMad

1 year ago

EC component models are as basic as it gets and therefore diodes also lack voltage dependent junction capacitances. In reality a varactor diode would be a place to start even though I think that's pretty much obsolete technology by now. Anyway, here is a little hack for EC to get a sim going: https://everycircuit.com/circuit/6222024766390272

ViolationMad

1 year ago

Considering you already have opamps in your schematic, for LFOs (low frequency oscillator) it might be worth looking into VCO (voltage controlled oscillator) designs. For basic audible frequency tasks, practically any off the shelf general purpose opamp will do: https://everycircuit.com/circuit/6326160337403904

SleepyMolecule

1 year ago

Thank you

TheObserver

7 months ago

These different options might also help for wave shaping and tuning..... especially linking with an OP amp https://everycircuit.com/circuit/5392621660930048

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