to convert 12v ~ 5v R1 = 13kOm R2 = 20kOm || constant for arduino nano : KF 0.00488758553 ; error 0.021 ; ...
Arduino board requires a USB cable connected to a laptop/PC or an external AC/DC adaptor for power supply. If you want a portable Arduino-based project, you need a battery for power supply. 9V PP3 is ...
This code is used to display voltage and frequency measurements on an OLED display. The voltage measurement is done by using an analog input and a voltage divider circuit with resistors R1 and R2, ...
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