Amazon : 2 Channel Relay Module

4 PCS 5V 2 Channel Relay Module with Optocoupler Isolation, Relay Board with High/Low Level Trigger Jumper, 250V/10A AC or 30V/10A DC Load, Fault-Tolerant Design

5V Four-Channel Relay Module

Following are the major components present on the four-channel relay module, we will get into the details of this later in the article. 5V relay, terminal

Amazon : 3.3v Relay

Alinan 10pcs 1 Channel 3V/3.3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board for ESP8266 Development Board Add to cart

Amazon : 4 Channel Relay Module

2pcs 4 Channel Relay Module with Optocoupler Isolation, 4.5–36V Wide Voltage, -40°C to +85°C, 10A Load, High/Low Level Trigger, Microcontroller Compatible Add to cart

KEAcvise 4-Pack 5V 1-Channel Relay Module

About this item Control Equipment The single-channel relay module employs a high-quality DC5V relay and SMD optical isolator, supporting high/low level triggering and widely used for controlling various

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