Please don't let the title fool you.
It's an inexpensive build. And if you like to tinker with Arduinos., this project offers lots opportunities.
The code used in this video can be found here:
https://github.com/jmharvey1/ArduinoCPO
Key components used:
2.8" Inch TFT LCD Display Touch Screen
SS Micro
Leonardo/Uno
LM2596S
MAX9814
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Code Practice Oscillator; Aka: The Three Arduinos | NatokHD