{wiki}

= Oscillator
{synonym}

Something where <DC voltage> comes in, and a periodic voltage comes out.

\Video[https://www.youtube.com/watch?v=eYVOdlK15Og]
{title=Oscillators: <RC oscillator>[RC], <LC oscillator>[LC], <crystal oscillator>[Crystal] by GreatScott! (2015)}
{description=
Good video. Contains actual <breadboard> experiments on <oscilloscope> and circuit diagrams
* https://youtu.be/eYVOdlK15Og?t=66 <RC oscillator> on <breadboard>. Produces <rectangular wave>. Mentions popular <integrated circuit> that does it: <555 timer IC>.
* https://youtu.be/eYVOdlK15Og?t=175 <LC oscillators> allows for higher frequencies. Produces <sinusoidal> output on <MHz> range. Uses an amplifier to feed back into input and maintain same voltage. Hard to make reliably on breadboard.
* https://youtu.be/eYVOdlK15Og?t=315 <crystal oscillator>. Mentions it acts like an <LC oscillators>. Shows and equivalent model. Wish he had talked more about them. You need support components around it: similarly to the LC case, the amplifier is generally not packaged in.
}


 Electronic oscillator