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Direct digital synthesis (DDS) generators can make it easy to generate signals from square/ramp/sine to any arbitrary waveform with Arduino. The frequency can be set in the sketch and the system takes care of making it happen. Here's an overview of how the DDS concept works and a demo for an Uno. The circuit is shown with the waveforms on a scope and is also simulated online with Tinkercad's free Uno simulator. Timing: 0:00 Intro 1:03 Basic DDS: Counter with R-2R Resistor ladder DAC simulated on an Uno in Tinkercad 2:58 Change from Ramp to Square wave 3:18 DDS Sine wave generator using look up table 4:21 DDS block diagram and functional description 7:05 Phase accumulator - lots of bits 9:57 DDS system equation for calculating the tuning word 10:36 DDS generator Uno sketch and hardware demo on a scope 13:18 Summary Sketch https://github.com/GadgetReboot/DDS_G... DDS System block diagram, info, and equation from Analog.com https://www.analog.com/en/analog-dial... Tinkercad Circuits https://www.tinkercad.com/learn/circuits Resistor Ladder DAC https://en.wikipedia.org/wiki/Resisto... Nyquist conditions https://en.wikipedia.org/wiki/Nyquist... Numerically controlled oscillator https://en.wikipedia.org/wiki/Numeric... Support the channel by using these affiliate links to check out Banggood's sale on Tools & Electronics this month (2021 4.07 - 4.18) : Banggood hot brand tools https://bit.ly/3dSyO2l Electronic Brand Sale https://bit.ly/2PHpeau Creality 7th Anniversary Sale https://bit.ly/3d0fLUi Equipment I regularly use (support the channel by shopping through these affiliate links - I may earn a small commission and it doesn't cost you extra): Mustool MT315 Digital Microscope https://www.banggood.com/custlink/KKv... 946C Solder Hot Plate 200mm x 200mm https://www.banggood.com/custlink/K3D... ANENG AN8008 True RMS Multimeter https://www.banggood.com/custlink/KKD... Minleaf NPS3010W Power Supply https://www.banggood.com/custlink/KKK... FY6900 Dual Channel 60MHZ Signal Generator https://www.banggood.com/custlink/vGK... Siglent SDS1104X-E 100Mhz Digital Oscilloscope 4 Channels Standard decoder Amazon.com: https://amzn.to/36fH1ui Amazon.ca: https://amzn.to/36fNWUc Support me on Patreon: / gadgetreboot LBRY/Odysee: https://odysee.com/@GadgetReboot:4 #ElectronicsCreators