change a square wave into a sine wave (3 pole R-C filter). How to change a square wave into a sine wave (or triangle wave) with the help of a 3 pole R-C filter. The showed circuit works good on 31 KHz. The signal weakens when it passes the filter, so amplificaton (1 transistor at the output) could be necessary. More circuits in my books, on the Lulu website, author Ko Tilman.
All the videos hat I have published on You Tube can be found via my Channel Trailer: Link is
In thematical order you can find these video’s under the “comments” section. My books about electronics are available via the website from “Lulu”, search for author “Ko Tilman” there. My books are also available via Barnes and Noble and via Amazon. Regarding all my video’s: I constantly keep them actual, so the original video’s with the most recent information are always on YouTube. That is the source, and search there. When my video’s are reproduced or re-edited on other websites/channels you cannot be sure about the original content (=really working electronics) and important adaptations to the circuits.
Tags: change a square wave into a sine wave (3 pole R-C filter), square, wave, sine, radiofun232, resistor, capacitor, filter, waveform, change