Presenting the Sallen-Key filter topology, an easy to design and analyze active filter that can be adapted to work as any kind of filter, from Low Pass, to High Pass and Band Pass. This video goes through the theory behind this type of filter and shows a design example of a 2nd order low pass filter. To better understand the contents of this video it is recommended to first view the previous episodes of the series, especially episode 5, first order high pass filters, which introduces the concepts of transfer functions, poles and zeros: https://youtu.be/O043gCEHHt8 Happy Experiments! Link to the tutorials series: https://www.youtube.com/watch?v=NWeY9smWsmQ&list=PL3SNC7XyKklZmaZnn3TQkYOXXnTN_lO3U On-line circuit simulator, from PartQuest (Siemens): https://explore.partquest.com/ Link to my Patreon page: https://patreon.com/eleneasy Please check out my website eleneasy.com, where I publish related articles: https://eleneasy.com/ and my dazzlingsolutions.com web site, where I post blogs related to networking, software, IT and electronics in general: http://dazzlingsolutions.com/ I also have a presence on: Twitter: https://twitter.com/eleneasy1/ Facebook: https://www.facebook.com/crcarrano/?modal=admin_todo_tour LinkedIn: https://www.linkedin.com/in/carlo-carrano-32ab7653/ Pinterest: https://www.pinterest.com/crcarrano/ Quora: https://www.quora.com/profile/Carlo-Carrano-1 Instagram: https://www.instagram.com/eleneasy_i/ If you liked this video, please don’t forget to give it a “thumbs up” and, also, consider to subscribe to the channel, to get free notifications when new videos are published. You can also help me create these videos by making a small periodic donation on Patreon: https://patreon.com/eleneasy Or, you can support the channel through a single PayPal donation. In such a case, please add a note to clarify that that is your gift to the eleneasy.com channel: https://paypal.me/eleneasy Thank you for watching! ... https://www.youtube.com/watch?v=aVQ7iV_Ir7A

Today we upgrade the synth rack to host the softpot that we introduced last week, and a keyboard. It is a new shelf that is deep enough to work as a sort of a table. The keyboard, on which we'll work later, sits on the back of this table, while the softpot stands in front of the keyboard, glued to the table thanks to the sticky bottom of the softpot itself. Here are the links to previous videos that might be useful to better follow this one: The making of the rack: https://youtu.be/JhL6bF2AeFA Assembling and installing the power rails: https://youtu.be/BbaRJ3uu0NI Glue for PLA: https://smile.amazon.com/Model-Expo-Insta-Super-Filling/dp/B07Z57WPBJ/ref=sr_1_1?crid=3L4PLVV77I8WD&keywords=rockets+gap+filling+medium+glue&qid=1654182787&sprefix=erockets+gap+filling+medium+glue%2Caps%2C74&sr=8-1 Where to buy the softpot: https://www.sparkfun.com/search/results?term=membrane+potentiometer https://www.amazon.com/s?k=softpot+membrane+potentiometer&crid=2E45HX0BTNBA1&sprefix=softpot%2Caps%2C154&ref=nb_sb_ss_ts-doa-p_1_7 https://www.digikey.com/en/product-highlight/s/spectra-symbol/softpot-potentiometers https://www.mouser.com/c/?q=softpot How a softpot membrane resistor works: https://www.spectrasymbol.com/product/softpot/ Link to the archive page, containing all the schematics and other design parts of the project: https://eleneasy.com/the-analog-synthesizer-project/ Link to the complete YouTube series on the project: https://www.youtube.com/playlist?list=PL3SNC7XyKklY-bs-r3Dx5Ctq3Ha0DXRIb Subscribe to the channel to receive notifications for every new video I publish, so you can follow all the episodes related to this project. And, please, don't forget to give me a thumb up! Please support the channel by donating through the following links: one time donations: https://paypal.me/eleneasy monthly donations: https://patreon.com/eleneasy Also: Check out my website eleneasy.com, where I publish related articles: https://eleneasy.com/ and my dazzlingsolutions.com web site, where I post blogs related to networking, software, IT and electronics in general: http://dazzlingsolutions.com/ I also have a presence on: Twitter: https://twitter.com/eleneasy1/ Facebook: https://www.facebook.com/crcarrano/?modal=admin_todo_tour LinkedIn: https://www.linkedin.com/in/carlo-carrano-32ab7653/ Pinterest: https://www.pinterest.com/crcarrano/ Quora: https://www.quora.com/profile/Carlo-Carrano-1 Instagram: https://www.instagram.com/eleneasy_i/ Thank you for watching! ... https://www.youtube.com/watch?v=ULLdrwnD4HU