Product Description

MOSFET is an electronic device with excellent switching characteristics, widely used in circuits that require electronic switches, such as switching power supplies and motor drives, as well as lighting dimming. Relays are another type of module with switch characteristics that everyone is very familiar with. However, due to the fact that the working principle of relays generally relies on mechanical contacts to achieve the purpose of opening and closing, this inevitably leads to the situation where relays cannot work when the switching time is very short. In addition, the honking sound emitted during contact switching is also a troublesome thing in some situations.

The 4-channel MOSFET switch we designed can provide up to 4 sets of electronic switches, each used to control different circuit modules. Due to the working principle of MOSFET, this electronic building block can only be used to control DC circuits, such as DC LED screens, and is not suitable for controlling AC circuits. In extreme cases, this MOSFET switch can be used to control a 100V/33A DC circuit, but the recommended minimum DC voltage for control is not less than 9V.

In terms of circuit connection, the wiring at the controlled end is slightly more complicated. Taking the control of a 12V LED strip as an example, first connect the power supply between the positive (+) and negative (-) poles;

Next, connect the positive pole of the LED strip to the positive pole (+) of the module, and connect the negative pole of the LED strip to switch 1 (S1);

If there are other LED light strips that need to be controlled, simply connect the positive pole of the LED light strip to the positive pole (+) of the module, and then connect the negative pole of the LED light strip to switch 2 (S2), switch 3 (S3), and switch 4 (S4) in sequence;

The wiring of the control end is much simpler. We only need to connect the corresponding control port to the Arduino sensor expansion board through the sensor connection wire, and then we can control these 12V LED light strips through Arduino. In the experiment, we connected two LED light strips.

The test code is as follows:

int s1Pin = 6;

int s2Pin = 7;

void setup() {

  pinMode(s1Pin, OUTPUT);

  pinMode(s2Pin, OUTPUT);

}

void loop() {

  int i;

  digitalWrite(s1Pin, HIGH);

  digitalWrite(s2Pin, HIGH);

  delay(500);

  digitalWrite(s1Pin, LOW);

  digitalWrite(s2Pin, LOW);

  delay(500);

  for (i = 0; i < 10; i ++) {

    digitalWrite(s1Pin, HIGH);

    delay(500);

    digitalWrite(s1Pin, LOW);

    delay(500);

  }

  for (i = 0; i < 100; i ++) {

    digitalWrite(s2Pin, HIGH);

    delay(50);

    digitalWrite(s2Pin, LOW);

    delay(50);

  }

}

Product Parameters

1. Working voltage: DC9-100V

2. High level triggering

3. Maximum output current: 33A

4. There is optocoupler isolation between the input end and the signal end

5. Support PWM control

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