5V 12V low level trigger One 1 Channel Relay Module interface Board Shield For PIC AVR DSP ARM MCU for Arduino

Relay module with one channel operating at 5V or 12V, designed to control electrical devices using controllers like Arduino or PIC and AVR, and others. 🔌 What is this product? It is an electronic board containing one relay (a mechanical electric switch) capable of turning on or off high-voltage devices (such as 220V) using a small signal from the controller. ⚙️ Basic specifications Number of channels: 1 (one relay) Operating voltage: 5V or 12V (depending on the version) Activation type: Low Level Trigger (works when signal is LOW) Supports: PIC / AVR / DSP / ARM / Arduino Endurance: usually up to 10A at 250V AC or 30V DC 🔧 How does it work? When a LOW signal (0V) is sent from the controller → the relay activates When a HIGH signal (5V) is sent → the relay disconnects 💡 This is opposite to some units (High Trigger), so pay attention in programming. 🧩 Components of the unit Relay Transistor for control Diode for protection LED indicator (lights up when on) Connection terminals 🔌 Connection terminals Control side: VCC → 5V or 12V GND → Ground IN → Control signal from the controller Load side: COM → Common NO (Normally Open) → Open by default NC (Normally Closed) → Closed by default ⚡ Usage example You can use it for: Turning on a 220V lamp Turning on a fan or pump Controlling household appliances Smart home projects