Tremolo or vibrato oscillator for audio: the basis oscillator between 1 Hz and 50 Hz demo/schem pt1.

Please read the description/textbox first.
In this video I show the basics of an oscillator in the (say) 1 Hertz up to (say) 100 Hertz range that is suitable to drive a transistor that does one job: generating tremolo or vibrato in audio circuits.

I still have to study the differences, also have to study how to drive the “tremelo” or “vibrato” transistor (that has to generate these specific audio effects: tremolo/vibrato) but I surely know that both audio circuits need an oscillator in the 1 Hertz (perhaps even lower) to (say) the 30-70 Hertz frequency band.

This 2 transistor circuit can do that job.

First lighthouse LED schematic (old first video) is here https://youtu.be/mXZJi4gzjG8
Second lighthouse LED schematic (make an ambient light) is here https://youtu.be/o7IAv5EhhB4

I used now 2 x a capacitor of 100 N (=0,1 uF) but you can surely use 2 x a capacitor of 220 N (0,22 uF) or even 2 x a capacitor of 470 N (0.47 uF) to get to very low “tremolo” or for whatever use frequencies.

Study that perhaps with the oscilloscope & a frequency counter, to get insight. Or simply listen to the sound(s) via an audio amplifier.

Of course (perhaps) I will need some components to drive the tremolo or vibrato circuit (read: the tremolo or vibrator transistor) in a proper way, it will take time to develope it further. It surely will succeed, even when I have to start allover again.

This circuit shows the basics and is even very useful for other purposes, everywhere where a transistor or a MOSFET or whatever other electronic “switch” component has to/can be driven on very low frequencies, say in the 0.1 Hertz (or 0.01 Hertz) up to 50 Hertz (or higher) range.

Simply by changing the 2 capacitors, showed in the schematic. These values go from 10 uF to 10 N (0.01 uF).

Making high value quasi bipolar capacitors can be done by soldering 2 electrolytics “back to back”, to mimic a non polarized capacitor.

The capacitor value is in that case halved (1/2): because the electrolytics are in series. So two 10 uF electrolytics soldered back to back act as a quasi non polar capacitor of 5 uF. In general not usable for high power circuits or loudspeaker circuits, such a quasi combi can burn out on higher AC (loudspeaker) currents. Up to say 5-8 Watt that simple solution can work.

Test, try, use, experiment & enjoy.

Nothing can go wrong with this circuit when you make it, on a breadboard or otherwise.

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Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. Some persons try to find gold via my circuits. I take distance from all these fake claims. I cannot help that these things happen. Upload 30 August 2022.