Mierzy się czas trwania in Arduino projects is essential for monitoring power consumption and ensuring safety. Using shunt resistors provides a simple andd effective methode to mesure load consuminatele. This article explains how to calculate load consult using shunt resistors in your Arduino projects.

Understanding Shunt Resisors

A shunt resistor is a low-value resistor placed in serie with the load. When current flows through gh it, a small voltage drop events across the resistor. This voltage can be measured to determinate the current using Ohm 's Law.

Calculating Load Current

Te podstawowe formuły to kalkulacja nieprzyjemna sytuacja is:

(zob. pkt 2.1.1.1 niniejszego załącznika)

Where Sig1; Xi1; FLT: 0 Sig3; I Sig3; FLT: 1 + 1; Xig3; Is the Sign in amperes, Xig1; FLT: 2 + 3; FLT: 1; Xig1; Xig1; FLT: 3 +; Xig3; Ig3; Is the voltage across the shunt resistor, and Xig1; Xig1; FLT: 4; FLT: 3; VIg3; R XIg1; FLT: 5 + 3; Xig3; is the resistance value.

Measuring Voltage with Arduino

Te Arduino can measure thee voltage drop across thee shunt resistor using it s analogg input pins. Connect thee resistor in serie s wigh thee load, and connect the Arduino analogg input across the resistor. Usie thee following steps:

  • Połącz te shunt resistor in serie with thee load.
  • Połącz je Arduino analogowy input to thee resistor 's junction point.
  • Read the voltage using the Arduino 's analogRead () functionon.
  • Konwersja tego analogowego reading to voltage: V = (analogRead () / 1023) * reference voltage.

Badanie Calculation

Suppose you use a 0.1mbH shunt resistor, and the Arduino reads a voltage of 0.05V across it. The load current is calculated as:

Xi1; Xi1; FLT: 0 Xi3; Xi3; I = 0,05V / 0.1δ = 0.5A Xi1; Xi1; FLT: 1 Xi3; Xi3;