Current sensing is an essential technique in electrics for monitoring and controling electrical systems. Using Arduino, it is possible to o measure current prequately by designing appropriate contingits and perfoming calculations. This guide provides praktical steps for curn sensing, including currit design and necessary calculations.

Basics of Current Sensing

Current sensing involves measuring thee flow of electric charge courcigh a common methode uses a shunt resistor, which creates a small voltage proportial to thee curret passing complegh it. Arduino can read this voltage via it s analog input pins.

Určeno podle Circuit

Te typical current sensing acrossit includes a shunt resistor connected in series with thee cheadd. Te Arduino measures thee voltage across this resistor. To ensure preciate readings, select a resistor with a low resistance value to minimize power loss while e maintaining mesticurable voltage levels.

Example circumpients:

  • Shunt resistor (např., 0.1Ø)
  • Arduino board předseda
  • Napájecí vysílače
  • Power supply

Výpočet for Current Measurement

Te voltage across the shunt resistor (V 'I1; FL1; FLT: 0' I3; shunt 'I1; FLT: 1' IR; FLT: 1 'IR 3; GL3; GLD 3; GL3; GL3; GL3; GLS 3; GLS 3; GLS 3; O' IR 3; IR × R 'I1; FLT: 4' IR 3; GL 3; SHunt '1; FLT: 5' IR 3;. TO-find 'E curgent, reregove The formula:

CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE3; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE3; CLANE3; CCANE3; CEUTIVIVIVI1; CEUTIVI1; CEUTIV.3; CLANE3;

Arduino reads thoe voltage as an analog value (0-1023). The voltage can be calculated as:

CLANE1; CLANE1; CLANE1; CLANE3; CLANE1; CLANE1; CLANE3; CLANE3; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; = (Analog reading / 1023) × Reference voltage CLANE1; CLANE1; CLANE1; CLANE3; CLANE3;

Using this, thee current is:

CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE3; CLANE3; CLANE1; CLANE3; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE1; CLANE3; CLANE3; CLANE3; CLANE3; CCANE3; CCANE3;

Example Calculation

If the Arduino reads a voltage of 0.5V across a 0.1ţresistor, thee current is:

I = 0, 5V / 0, 1Ø = 5A