Matrix - Relay/zh

English

1 Introduction

Relay

这是一个单刀双掷继电器，线圈电压为直流5V，触点电流可达10A，适合驱动直流或交流大功率负载。NO为常开触点，NC为常闭触点，COM为公共触点。当向S引脚施加高电平，继电器线圈导通，此时NO触点断开，NC触点闭合。 This is a SPDT relay. Its coil voltage is 5V.

2 Features

• 1 Form C
• 5V coil voltage, 3.3/5V control signal
• Contact current up to 10A
• LED indicator
• 2.54mm spacing pin

3 How To

3.1 Connection

• Connect to Tiny4412 SDK (1506)

Connect the module's pin S to GPIO PIN1, V to 5V and G grounded

3.2 Code Sample in C Under Linux

#include <stdio.h>
#include <string.h>
#include "libfahw.h"
 
int main(int argc, char ** argv)
{
    char *status = "off";
    if (argc != 2) {
        printf("Set relay on\n");
    } else {
        status = argv[1];
        printf("Set relay %s\n", argv[1]);
    }
 
    int pin = TINY4412_GPIO_PIN1;
    int ret = -1;
    if ((ret = exportGPIOPin(pin)) != 0) {
        printf("exportGPIOPin(%d) failed!", pin);
    }
    if ((ret = setGPIODirection(pin, GPIO_OUT)) != 0) {
        printf("setGPIODirection(%d) failed", pin);
    }
 
    if (strcmp(status, "on") == 0) {
        ret = setGPIOValue(pin, GPIO_LOW);
    } else {
        ret = setGPIOValue(pin, GPIO_HIGH);
    }
    return ret;
}

3.3 Compile and Run

git clone http://github.com/friendlyarm/fa-hardware.git
cd fa-hardware
cd demo
cd matrix-relay
make

Copy your compiled bin to your board and you are ready to go.