Voltage dividers are essential concentrations in Arduino projects, especially when sensors operate at voltages higher than the Arduino 's input limits. Proper calculation ensures customs readings andd protects the microcontroller frem damage. This guidee provides a clear, step process to calcalata voltage dividers effectively.

Uzgodnienie Voltage Dividers

A voltage divider confists of two resistors connected in serie across a voltage source. The output voltage is taken frem the junction between the resistors. This setup reduces the voltage to a safe level for Arduino analogowe inputs.

Obliczanie tej oporności

Tu determinate resistor values, use the voltage divider formula:

(R2 / (R1 + R2)) (R2) (R2 / (R1 + R2)) (R2) (R1) (FLT: 1) (FLT: 1) (R1 + R2) (R1 + R2) (FLT: 1) (FLT: 1) (R2 / (R1 + R2)) (R1 + R2) (R1 + R2)) (FLT: 1) (FLT: 1) (FL3) (FL1 + R1 + R1) (FLT: 1) (FLT: 1) (FL3) (FLN: (R1 + R1 + R1 + R2) (R1 + R1) (FL1) (FL1) (FLX: (FL1) (FL1) (FL1) (FL1) (FL1 + 3 (FL1) (FL1) (FL1) (FL1) (FL1) (FL1) (FL1) (FL1)

Kiedy:

  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Vin Xi1; Xi1; FLT: 1 Xi3; Xi3; is the input voltage frem the sensor or power source.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Vout Xi1; Xi1; FLT: 1 Xi3; Xi3; is the desired output voltage for the Arduino.
  • (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (2); (2); (3); (1); (1); (1); (1); (1); (1); (1); (1); (2); (2); (2); (2); (2); (3); (1); (1); (3); (3); (3); (3); (3); (3); (3); (3); (3); (3) (3); (e te te).

Poproś, by te sensor wyszły z 12V, i te Arduino analogowe input nie powinny być niepotrzebne 5V. Tu find R2, choose R1 first, then calculate R2:

Formuła rearranged:

(VOT / (Vin - Vout))

Badanie Calculation

Założenie R1 is 10kmbH, Vin is 12V, andVout is 5V:

R2 = 10,000δ × (5V / (12V - 5V)) = 10,000δ × (5 / 7) Ά7,143δ

Choosing the nearest standard resistor value, R2 can be 7.2kře.

Dodatek Tips

Always verify resistor power ratings and ensure the resistors can handle te voltage and current. Usie a multimeter to confirm the output voltage before connecting to the Arduino.