If you are looking for a way to switch on or off devices that use higher voltage or current than your microcontroller or sensor can handle, you might want to consider this Relay Module 4 Channel. This is a module that contains four 5V relays and the associated components for switching and isolating. Each relay can handle up to 250VAC or 30VDC and 10A of current, which makes it suitable for controlling devices such as lamps, motors, pumps, fans, etc. The module can be easily interfaced with various microcontrollers and sensors, such as Arduino, Raspberry Pi, NodeMCU ESP8266, etc. using the four input pins that accept TTL logic signals. The module also has optocouplers that form an additional layer of isolation between the load and the input, which can prevent damage from voltage spikes or noise. The module has two power pins that can be connected to an external 5V power supply or the same power source as the input, depending on the jumper setting. The module also has LEDs that indicate the status of each relay.
Some of the features and specifications of this product are:
- Relay type: SPDT (Single Pole Double Throw)
- Relay voltage: 5V
- Relay current: 15-20mA (drive), 10A (contact)
- Relay contact voltage: 250VAC or 30VDC
- Input type: TTL logic
- Input voltage: 3.75V to 6V
- Input current: 5mA
- Isolation type: Optocoupler
- Power selection: Jumper
- Power pins: DC+ and DC-
- Input pins: IN1, IN2, IN3, IN4
- Output pins: NCx, NOx, COMx (x = 1 to 4)
- Indicator type: LED
- Dimensions: 75 x 55 x 19 mm
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