Voltage and Current Sensors
12 products
Voltage and current sensors are essential for energy monitoring, power analysis, and protection circuits in electronic projects. In this category, you'll find a variety of sensor types ranging from DC voltage divider modules to AC voltage measurement boards, Hall-effect current sensors to shunt resistor modules. These sensors are widely used in microcontroller-based hobby projects (Arduino, ESP32, STM32) as well as industrial control systems.
When selecting the right sensor, first determine the type of current/voltage (AC/DC), maximum rating, and accuracy requirements. For current sensors, factors like output type (analog voltage, digital I2C/SPI), isolation (opto-isolated, Hall-effect), and internal shunt resistor are critical for safety and measurement accuracy. For voltage sensors, the voltage divider ratio, input impedance, and galvanic isolation (especially for AC signals) become important.
Commonly Used Sensor Models
- ACS712: Hall-effect based, isolated DC/AC current sensor (5A/20A/30A options)
- ZMPT101B: AC voltage transformer-based isolated measurement module
- INA219: High-side current/voltage monitor with I2C interface
- Voltage Divider Modules: Resistor divider circuit for 0-25V DC measurement
Typical applications include battery capacity tracking, solar panel power monitoring, motor driver current control, and energy metering. When integrating a sensor into your project, pay attention to supply voltage, output signal level (0-5V, 0-3.3V), and compatibility with your microcontroller's ADC resolution. Overlooking these can lead to unexpected measurement deviations or port damage.
