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
Second lighthouse LED schematic (make an ambient light) is here

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.

My You Tube channel trailer is here: When you search, search always “NEWEST FIRST” to get the right overview. You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in.

My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there. I keep all my YT videos constant actual, so the original video’s with the most recent information are always on YouTube.

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.
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