Ultrasonic Sensor HC-SR04
$3
OLED LCD display, 0.96 inch OLED screen, I2C display module, 128x64 OLED, Arduino display, ESP32 OLED, OLED for Raspberry Pi
$20
The PZEM-004T is a compact and powerful AC energy monitoring module capable of measuring voltage, current, power, and energy consumption. Ideal for DIY energy meters, smart homes, industrial monitoring, and IoT applications.
The PZEM-004T V3.0 is a high-precision AC energy monitor sensor that can be integrated into microcontroller systems (like Arduino or ESP32) via TTL serial communication. It measures the key parameters of an AC load: voltage (V), current (A), active power (W), and energy consumption (Wh).
The module comes with a non-invasive split-core current transformer (CT) that clamps around a wire to measure current without direct electrical contact, making it safer and easier to install.
It supports 80–260V AC input and offers real-time data reporting for dynamic applications. It’s widely used in smart energy projects, IoT devices, and home automation systems.
